pli

Light emitting device, electronic appliance, and method for manufacturing light emitting device

To provide a light emitting device that has a structure in which a light emitting element is sandwiched by two substrates to prevent moisture from penetrating into the light emitting element, and a method for manufacturing thereof. In addition, a gap between the two substrates can be controlled precisely. In the light emitting device according to the present invention, an airtight space surrounded by a sealing material with a closed pattern is kept under reduced pressure by attaching the pair of substrates under reduced pressure. A columnar or wall-shaped structure is formed between light emitting regions inside of the sealing material, in a region overlapping with the sealing material, or in a region outside of the sealing material so that the gap between the pair of substrates can be maintained precisely.




pli

Vertically adjustable shelf support assembly for an appliance

An appliance is provided having one or more racks or shelves, the position of which may be adjusted vertically. Multiple different positions along the vertical direction can be made available for selection by a user of the appliance. One or more mechanisms allow for the selective adjustment and securing of the vertical position at which a shelf may be located.




pli

Convertible furniture system base and modular applications including armchairs, tables, and storage cabinets

The present invention pertains to a modular furniture system in which a flat-foldable or easily assembled and disassembled rigid base structure composed of rectangular-cross-sectioned pieces each with specific dimensions serves variously, once assembled, as the supporting framework for a flat-foldable chair seat-and-backrest module, which configured together with the base structure serves as either an upright dining chair with armrests or as a lower and more reclined lounge chair with armrests, or alternatively as configured for supporting the connectable or foldable components of a flat planar surface module to be used for dining or to serve as a desktop, or alternatively as configured for supporting a storage cabinet module with drawers or doors.




pli

Method for the application of a permanent electrical contact to the web of rails

Method for applying an electrical contact to a hole (2) of a metal wall portion (1), comprising the steps of providing a bush (12), a punch (11) with a shaft (16), an expansion portion (19) and a connecting portion (20) thereof, a pulling device (21) with an abutment portion (22) and a pulling mechanism (23) for engaging the punch (11) and to pulling it proximally with respect to the abutment portion (22), inserting the punch (11) in a passage hole (25) of the bush (12) so that the connecting portion (20) protrudes proximally from the bush and the expansion portion (19) is located on end (14), bush connecting the punch (11) to the pulling device (21), inserting the preassembled bush (12)-punch (11)-unit from a proximal side of the wall portion (1) distally in the hole (2) and activating the pulling device (21) to pull the punch (11) proximally through the bush, thereby radially expanding bush and permanently anchoring it in the hole (2).




pli

Magnetic latch for safety applications with adjustable holding force

A magnetic latch for industrial environments includes fixed magnetic pole pieces that may be sealed within a housing to resist environmental contamination and which provide for perpendicular engagement faces for use with gates having a rolling or swinging configuration. An RFID tag reader may be incorporated into the magnet assembly of the latch for reading a specially encoded RFID tag in a keeper portion of the magnetic latch.




pli

Fully automatic self-service key duplicating kiosk

A self-service, fully-automatic kiosk for duplicating keys includes a kiosk housing having a customer interface for receiving payment from a customer for the purchase of at least one duplicate of the customer's key. A key-receiving entry in the housing receives at least a portion of the customer's key to be duplicated, and a key analysis system within the housing analyzes the blade of a key inserted in the key-receiving entry to determine whether the inserted key matches one of a group of preselected key types and, if so, which preselected key type is matched. A key blank magazine within the housing stores key blanks for each of the preselected key types. A key blank extraction system extracts from the magazine a key blank for the preselected key type matched by the blade of the key inserted in the key-receiving entry. Then a key duplicating system within the kiosk replicates the tooth pattern of the blade of the key inserted in the key-receiving entry, on the blade of the extracted key blank.




pli

Cutting machine for gears, splines, and other shapes

A cutting machine for gear shaping or the like is provided. The cutting machine includes a gear shaping head. The gear shaping head has a ram that is guided by and reciprocates along a linear guide mounted between a saddle of the gear shaping head and the ram. At least one linear motor reciprocates the ram along a stroke axis relative to the saddle. The ram also carries a rotary drive and a spindle that reciprocate in unison with the ram. The rotary drive directly drives the spindle to journal the spindle through incremental angular positions during gear shaping.




pli

Key duplication machine

Apparatus, methods, and other embodiments associated with a key duplication machine are described. In one embodiment, an assembly for duplicating a master key includes an optical imaging device, a logic, a clamping assembly, and a cutting member. The optical imaging device is capable of capturing an optical image of at least a portion of the master key. The logic is capable of determining a key pattern of the master key from the optical image of the master key. The clamping assembly is capable of clamping a key blank and the cutting member is capable of cutting a key pattern into said key blank.




pli

Multi-key duplication, identification and cutting machine with clamp

A key duplication system comprising a key duplication housing wherein at least one key receiving aperture on a first side of the housing sized to receive a key blade and at least one key clamp adjacent to the at least one key receiving aperture, the clamp comprising a first clamp arm with a surface topography corresponding to a first key blade surface topography and a second clamp arm with a surface topography corresponding to a second key blade different from the first key blade.




pli

Stroke controller for a key duplicator

A stroke controller is mounted on a key duplicator and has a base, a drive shaft, a knob and a driven shaft. The base has a longitudinal shaft hole and a transverse shaft hole. The drive shaft is mounted rotatably through the transverse shaft hole. The knob is mounted on the drive shaft and has a drive gear. The driven shaft is mounted slidably through the longitudinal shaft hole and has a rack section engaging the drive shaft so that rotating the knob drives the driven shaft to slide relative to the base. The stroke controller precisely controls the movement of an original key and a key workpiece clamped on the key duplicator to manufacture a fine key duplicate.




pli

Axially-split radial turbines and methods for the manufacture thereof

Embodiments of an axially-split radial turbine, as are embodiments of a method for manufacturing an axially-split radial turbine. In one embodiment, the method includes the steps of joining a forward bladed ring to a forward disk to produce a forward turbine rotor, fabricating an aft turbine rotor, and disposing the forward turbine rotor and the aft turbine rotor in an axially-abutting, rotationally-fixed relationship to produce the axially-split radial turbine.




pli

Amplified backscatter x-ray inspection system

A method and apparatus for inspecting an object. A radiation generation system is configured to emit radiation. A detector system is configured to detect backscatter formed in response to the radiation encountering the object. A redirection system is positioned relative to the detector system and is configured to redirect the backscatter to the detector system.




pli

Apparatus and method for rapid and precise application of cosmetics

A method for selectively applying a reflectance modifying agent (RMA) to an area of skin, the method comprising receiving an image of the area of skin, identifying, using the image, a nominated point within the area of skin, determining an actual reflectance of the nominated point, applying an edge protection technique based on the image to generate one or more outputs, determining a desired reflectance of the nominated point based on the one or more outputs, calculating an amount of RMA to be applied based on the output, and determining whether to apply the RMA to the area of skin based on the amount of RMA.




pli

Didactic appliance

Deficiencies in existing attempts at educational software solutions are addressed by providing systems, methods, and devices that both replicate and facilitate the necessary elements of successful classroom-based learning, while taking advantage of the platform-specific benefits of handheld computing devices. Various applications address the issue of the limited screen size of mobile devices by using the motion sensors of the devices both to move from one part of a program to another, thus eliminating the need for on-screen navigation buttons and allowing the entire screen to be used for content, and also to reinforce learning through the use of mnemonics. In these applications, the user rotates the device after completing each step, in sequence, of a process-based series of problem solving techniques. Group learning dynamics are also reproduced through a study group feature.




pli

Coupling structure for multi-layered chip filter, and multi-layered chip filter with the structure

A coupling structure for a multi-layered chip filter includes a resonator layer including a resonator pattern with spaced areas and a coupling layer including at least two separated overlap portion patterns overlapped with the spaced areas of the resonator pattern respectively and a connecting portion pattern having multiple linear portions connecting the separated overlap portion patterns in an area not-overlapped with the resonator pattern.




pli

Battery charge management using a scheduling application

According to some embodiments, battery charge management using a scheduling application is disclosed. A first parameter may be received from a scheduling application running on a mobile computing device having a battery pack. Based on at least the first parameter and battery pack data, a required charge percentage for the battery pack may be determined and the remaining capacity of the battery pack may be determined. If the remaining capacity of the battery pack is less than the required charge percentage, a charge termination voltage may be determined and the battery pack may be charged to the charge termination voltage.




pli

Power supply system for motor vehicle provided with control device of voltage applied to field coil of generator

A power supply system for a motor vehicle includes a generator that includes a rotor having a field coil and a stator having an armature coil; a rectifier that rectifies AC power generated in the armature coil; an excitation control circuit that takes control of a voltage applied to the field coil; a capacitor that is connected to the DC side of the rectifier, and receives and transfers the rectified power; a battery connected to an electric load of the motor vehicle; a DC-DC converter that is connected between the capacitor and the battery and capable of converting unidirectionally or bidirectionally an input DC voltage into any DC voltage; and a selection switch which connects the capacitor or the battery to the excitation control circuit as a power supply source.




pli

Electrical appliance holder system

An appliance holder system for electrical handheld appliances of the type having a flexible electrical power cord attached thereto is provided. The appliance holder system includes an appliance holder assembly having at least one receptacle for receiving and storing at least one electrical handheld appliance having a flexible electrical power cord attached thereto. A power cord storage assembly of the system has a pair of spaced apart cord wrapping elements about which the flexible electrical power cord may be wrapped for storage. At least one of the cord wrapping elements is movable between a storage and release position. The cord wrapping elements are configured to retain the wrapped power cord upon the power cord storage assembly when the at least one of the cord wrapping elements is in the storage position and wherein the wrapped power cord may be removed from the power cord storage assembly without unwrapping the wrapped power cord when the at least one of the cord wrapping elements is moved to the release position.




pli

Device for the coupling of elastic and rigid contact line systems

For the coupling of two parallel contact wires of an elastic contact line system with a rigid contact line system, which has a power track (3) and a contact wire (4) affixed thereon, an elongated cantilever (5) is provided in a transition area, whose rigidity increases in the longitudinal direction from the elastic contact line system to the rigid contact line system. The two contact wires (1, 2) of the elastic contact line system are located along the cantilever parallel to the first contact wire (4), which is, in turn, clamped over the entire length of the cantilever. All three contact wires (1, 2, 4) are affixed on several multiple clamps (9) in the area of the cantilever (5), which clamps are located in a distributed manner along the cantilever. The multiple clamps (9) are located in recesses (12) of the cantilever.




pli

Electrical appliance holder system

A power cord management system for managing flexible electrical power cords associated with hair or bathroom handheld appliances includes a power cord storage body. A pair of spaced apart cord wrapping elements are coupled to the power storage body about which the flexible electrical power cord may be wrapped for storage. At least one of the cord wrapping elements is movable between a storage and release position. The cord wrapping elements are configured to retain the wrapped power cord upon the power cord storage body when the at least one of the cord wrapping elements is in the storage position and wherein the wrapped power cord may be removed from the power cord storage body without unwrapping the wrapped power cord when the at least one of the cord wrapping elements is moved to the release position. A power cord coupling mechanism is coupled to the power cord storage body for facilitating releasable retaining of a free end or other portion of the flexible electrical power cord to the power cord storage body.




pli

Method of controlling combustion of gas appliance

A method of controlling combustion of a gas appliance includes the following steps: a) Read a first burning data in a database; b) Burn gas according to the first burning data; c) Obtain a burning efficiency of the gas appliance; and d) Compare the burning efficiency with a predetermined value, and repeat the step b to the step d when the burning efficiency is higher than the value, or read a second burning data in the database and burn gas according to the second burning data when the burning efficiency is lower than the value. The present invention provides plural stages of burning according to the main component of the gas to be burned to increase the total burning efficiency.




pli

Condensing gas appliance and condensate trap therefor

A condensing fuel-fired appliance has a condensate trap that includes a trap body; a float; a flue gas inlet port for the introduction of flue gas into the interior region of the trap body; a condensate outlet port for the discharge of condensate from the interior region; and a flue gas outlet port for the discharge of flue gas from the interior region of the trap body. The float is configured to move in response to condensate collected in the interior region of the trap body to a position to substantially block the discharge of flue gas from the interior region through the flue gas outlet port. The float is also configured to move to a position to substantially block the discharge of flue gas from the interior region through the condensate outlet port when there is little or no condensate in the interior region of the trap body.




pli

Foam dam for appliance

An apparatus includes an inner rim, a base wall, a side wall and an outer rim. The inner rim has a first opening formed therein. The base wall extends outward from an inner edge of the inner rim and is integral with the inner rim. The side wall extends outward from an outer edge of the inner rim and is integral with the inner rim. The outer rim has a second opening formed therein and an inner edge integral with the side wall. The inner rim, base wall, side wall and outer rim are formed to prevent liquid seepage to one or more surrounding components of an appliance in which the apparatus is installed.




pli

Heating or cooling system featuring a split buffer tank

This invention relates to a heating/cooling system operating on the basis of a novel SPLIT BUFFER TANK; representing an efficiency improvement alternative to HVAC systems functioning with existing commercial buffer tanks. Currently, commercial buffers have the heat source provider (HSP)-return and system-return discharging to a common buffer/vessel. Novel SPLIT BUFFER is provided with a SEPARATION DISK placed inside the tank as mechanical way of separating the hot water inflow from the HSP from the warmer water inflow from system return. The disk moves up and down along the tank driven by demanded water supply and return. Pump-1 circulates hot water from the hot section of the buffer to the secondary system claiming for heat. Pump-2 circulates warmer water from the warmer section of the buffer through the HSP where it is reheated, and subsequently stored in the hot section of the buffer to reinitiate this cycle again.




pli

Horsewhip coupling configuration

A horsewhip includes a coupler having one end secured to a handle portion and having a ring formed in the other end. The coupler includes a recess formed in the middle portion. A tail portion includes a loop formed in one end for engaging with the recess of the coupler and includes a free end for engaging through the opening of the ring so as to solidly secure the tail portion to the handle portion. The tail portion may be easily secured to and may be easily disengaged from the handle portion by the users such that the tail portion can be easily replaced with a brand new one.




pli

Discipline stick

A disciplining apparatus including a handle and a plurality of elongated strips mounted on an end of the handle. The strips extend from the handle in a common direction. The strips are further configured in a shape of a cylinder.




pli

Personal compliance dispenser

A portable personal dispenser assembly comprising a combination of a dispenser and a communication enabled, portable handheld pocket-sized, personal computer in which the pocket-sized personal computer performs compliance monitoring of use of the dispenser and preferably controls and powers the use of the dispenser.




pli

Methods and systems for processing application forms

A method for processing application forms comprising extracting content from filled first forms of consumers, each of the first forms comprising one or more fields, arranging the extracted content of one or more fields of the plurality of fields of the plurality of filled first forms in a first matrix; encoding the content of each of the rows of the first matrix to define a second matrix; and disposing the encoded content of the second matrix in multiple empty second forms such that content of one column is disposed on only one of the empty second forms, each of the second forms includes the same type and number of fields as that of one of the filled first forms, further wherein the number of the filled second forms is based on the number of the one or more fields in the filled first forms.




pli

Slurry applicator for an agricultural machine

A trough is cut in the ground surface by a rotating member. The rotating member displaces soil upward with respect to the ground surface and rearwardly with respect to a direction of travel of the rotating member. While the soil is in the air, slurry is deposited into the trough. The soil is then redirected downward to the trough to cover the slurry with the soil.




pli

Apparatus and method for no-till inter-row simultaneous application of herbicide and fertilizer, soil preparation, and seeding of a cover crop in a standing crop

A no-till apparatus for application of herbicide and fertilizer, soil preparation, and seeding of a cover crop in a standing crop has inter-row assemblies configured to pass along inter-row areas between adjacent row lines of standing crop plants. Each assembly includes a fertilizer applicator, a no-till soil preparation element, a cover crop seed applicator, and a post-seeding element.




pli

Polycrystalline diamond compact including a polycrystalline diamond table containing aluminum carbide therein and applications therefor

Embodiments of the invention relate to polycrystalline diamond compacts (“PDCs”) comprising a polycrystalline diamond (“PCD”) table including at least a portion having aluminum carbide disposed interstitially between bonded-together diamond grains thereof, and methods of fabricating such PDCs. In an embodiment, a PDC includes a substrate, and a PCD table bonded to the substrate. The PCD table includes a plurality of bonded-together diamond grains defining a plurality of interstitial regions. The PCD table further includes aluminum carbide disposed in at least a portion of the plurality of interstitial regions.




pli

Contactless coupling and method for use with an electrical appliance

A coupling and various methods of use of the coupling. In one embodiment a coupling is provided for use with an appliance operated by a power supply, which coupling allows mounting/dismounting of the appliance without electrical isolation from the supply, said coupling comprising: a) a mounting member having a first encapsulated transformer element and suitable controls connectable to the power supply, said member being suitable for fixing to a structure; and b) a holder member engageable with said mounting member and suitable for holding or for connecting thereto an appliance, said holder member including a second encapsulated transformer element able to conduct power to an appliance.




pli

Monolithic optical coupling module based on total internal reflection surfaces

In one aspect, an optical device comprises a monolithic optical module which includes a first total internal reflection (TIR) surface, a second TIR surface adjacent the first TIR surface, and a first optical port aligned with the first internal optical beam dividing interface. An interface between the first TIR surface and the second TIR surface forms a first internal optical beam dividing interface. An exterior surface of the first TIR surface and an exterior surface of the second TIR surface form a generally V-shaped notch on the monolithic optical module. A first optical beam entering the monolithic optical module through the first optical port and incident on the first internal optical beam dividing interface is partially reflected by the first TIR surface to travel in a first direction as a second optical beam and partially reflected by the second TIR surface to travel in a second direction as a third optical beam. The second direction is generally opposite to the first direction.




pli

Light collecting and emitting apparatus, method, and applications

A light guide apparatus includes a light guide layer having a top surface and a bottom surface, and a transversely oriented side-end surface that forms an output aperture of the light guide, characterized by an index of refraction, n1, and further characterized by a length dimension in an intended light propagation direction towards the output aperture, where the intended light propagation direction is a z-axis direction of a Cartesian coordinate system; and a plurality of light injection elements disposed in the form of at least one linear strip in at least one of the top and bottom surfaces of the light guide layer, wherein some of the plurality of light injection elements are disposed on one lateral side of the strip and some other of the plurality of light injection elements are disposed on an opposing lateral side of the strip at a rotation angle Δz about the y-axis.




pli

Method and device for controlling tension applied to a media web

In a web printer, tension on the moving web is controlled by monitoring the tension on the web between two rollers and selectively operating an actuator driving the second roller to restore the tension to an acceptable range. The operation of the actuator includes modulating the speed at which the second roller is driven.




pli

Apparatus, system, and method for digital base modulation of power amplifier in polar transmitter

An amplifier receives an amplitude signal of a polar modulated signal at a base terminal of a transistor and receives a phase modulated carrier signal of the polar modulated signal at the base terminal of the transistor. The amplifier combines the amplitude signal and the phase modulated signal to produce a full complex waveform at a collector terminal of the transistor.




pli

Suppressed carrier harmonic amplitude modulator

A circuit includes a switched modulator stage combining an information signal with a square wave carrier to produce a first modulated signal; and a second modulation stage forming additional steps in the first modulated signal to produce a second modulated signal.




pli

Rail-to-rail comparator, pulse amplitude modulation receiver, and communication system using the same

A rail-to-rail comparator including a first comparison unit connected to a first terminal and configured to compare differential input signals to differential reference voltages; a second comparison unit connected to a second terminal and configured to compare the differential input signals to the differential reference voltages; and an output unit configured to be driven in response to a clock signal and to generate a complementary output signal according to comparison results of the first and second comparison units.




pli

Method of generating driving signal for driving dual mode supply modulator for power amplifier and device thereof

Provided is a method of generating a driving signal for driving a dual mode supply modulator for a power amplifier. The method includes obtaining an envelope of a complex baseband signal to be transmitted, comparing the envelope of the complex signal with a preset threshold value, when a current envelope of the complex signal is the preset threshold value or greater or when there is a result having the preset threshold value or greater in previous N comparisons, outputting a digital board output signal configured with a first logic level through a digital-to-analog converter; and when the current envelope of the complex signal is smaller than the preset threshold value and when there is no result having the preset threshold value or greater in the previous N comparisons, outputting a digital board output signal configured with a second logic level through the digital-to-analog converter.




pli

Apparatus and method for producing signals coded with amplitude shift keying

An apparatus for coding a signal by means of amplitude shift keying comprises a class E amplifier including a switching transistor, to whose gate is supplied a voltage having an operating frequency for operating the class E amplifier. For achieving an amplitude shift keying in the output signal of the class E amplifier, a circuit for switching the operating frequency of the voltage supplied to the gate of the switching transistor, or the resonance frequency of the class E amplifier, between a first value and a second value is provided and in order to switch a deviation degree between the operating frequency and the resonance frequency between a first value and a second value.




pli

Modulation apparatus for class D switching amplifier

A modulation apparatus for a class D switching amplifier is capable of reducing power consumption of an Electro-Migration Interface (EMI) of an output end and a gate driver end in a zero input signal. The modulation apparatus for a class D switching amplifier includes a control unit for detecting and outputting a control signal which is a common signal component of a first modulation signal modulated by using a first input signal and a second modulation signal modulated by using a second input signal; and is characterized by feedback of a first output signal, a second output signal and a common output signal outputted by using the first modulation signal, the second modulation signal and the control signal through an input of the modulation apparatus.




pli

Signaling and channel estimation for uplink transmit diversity

In a method of transmitting a data stream from a transmitter in a multiple-input-multiple-output (MIMO) wireless communication system, where the transmitter comprises a plurality of transmit antennas, a discrete Fourier transform (DFT) is applied to the data stream to generate a plurality of symbol sequences; symbols of a first symbol sequence from the plurality of symbol sequences are paired with symbols of a second symbol sequence from the plurality of symbol sequences to generate a plurality of symbol pairs, wherein the pairing results in an orphan symbol; a space-time block code (STBC) is applied to the symbol pairs to generate a plurality of sets of STBC symbols, each set of STBC symbols being associated with a corresponding one of the plurality of antennas; a cyclic delay diversity (CDD) operation is applied to the orphan symbol to generate a plurality of CDD symbols, each CDD symbol being associated with a corresponding one of the plurality of antennas; and each one of the antennas transmits the corresponding set of STBC symbols and the corresponding CDD symbol.




pli

Profiled arc splitter plate

A profiled arc splitter plate for a switch having a fixed contact and a movable contact is provided to increase electromagnetic attractive forces on the arc generated during contact separation. The plate (300) comprises a body (306) defining an operatively inverted substantially V-shaped recess having a center notch (302) provided at the vertex of the recess and at least one protrusion (304) defined on either side of the center notch (302) along the inclined side walls of the recess, the movable contact of the switch displaceable through the recess without contacting the inclined side walls, in a spaced apart manner from the protrusions (304) and the center notch (302). Chamfers 308 are provided at an end of the plate (300) proximal to the vertex of the recess to provide an exit for hot gases towards the vent of the arc chamber.




pli

Sheet roll and sheet-like coupling member

A sheet roll comprises two glass films and a coupling portion, wherein end portions of the glass films are coupled together via the coupling portion and the coupled glass films are rolled into a roll shape. The coupling portion is a sheet-like coupling member formed of a resin film and placed on the end portions of the two glass films in a rolling direction so as to span therebetween. The sheet-like coupling member includes wide joint portions joined respectively to the end portions of the two glass films, and a necked portion which is narrower than the wide joint portions and is formed at a middle portion of the sheet-like coupling member in the rolling direction.




pli

Method and apparatus for superposed application of shipping labels over packing slips

The invention provides a method and apparatus for applying shipping labels over both folded or non-folded packing slips, or the like, at a single print-and-apply station, either through use of a label configured for application to a substrate and also in a superposed registered manner to another label of identical construction previously attached to the substrate, or by using a shipping label having a non-aggressive adhesive applied to a removable center section of the shipping label for attachment of the packing list, or the like, to the shipping label prior to application of the shipping label to the substrate.




pli

Method for binding a bundle of loose leaves or the like and end leaf applied thereby

Method for binding a bundle of loose leaves or the like in a cover. The method includes the step of providing an end leaf that includes a fixing strip on a side edge, with the fixing strip partly fixed to the end leaf and provided with a strip of glue on a part of the fixing strip which is not fixed to the end leaf. On the side of the fixing strip turned away from the end leaf, said strip of glue being provided with a removable foil. Another step is binding a free edge of the bundle of loose leaves together with the end leaf. Further steps include removing the foil, and providing the bound edge of the bundle of leaves and the end leaf in the back of the cover and fixing thereof in the cover only by the strip of glue.




pli

RF channel amplification module with instantaneous power limiting function

A radio frequency channel amplification module for communication satellite, comprises an input configured to convey an input radio frequency signal, an output configured to restore a pre-amplified output radio frequency signal intended to power a travelling wave tube amplifier that can be equipped with linearization means with predistortion, at least one first upstream gain control module arranged downstream of the input and one second downstream gain control module arranged downstream of the first upstream gain control module and upstream of any linearization means by predistortion. The channel amplification module also comprises an instantaneous power limiter intended to clip the peaks of the input radio frequency signals with a level exceeding a determined threshold value, the instantaneous power limiter being arranged in series between said first upstream gain control module and said second downstream gain control module.




pli

Operational transconductance amplifier with increased current sinking capability

An amplifier circuit includes an input terminal and an output terminal. A current sinking transistor includes a first conduction terminal coupled to the output terminal and a second conduction terminal coupled to a reference supply node. A voltage sensing circuit has a first input coupled to the input terminal and a second input coupled to the output terminal. An output of the voltage sensing circuit is coupled to the control terminal of the current sinking transistor. The voltage sensing circuit functions to sense a rise in the voltage at the output terminal which exceeds the voltage at the input terminal, and respond thereto by activating the current sinking transistor.




pli

Dual-band high efficiency Doherty amplifiers with hybrid packaged power devices

An amplifying structure includes a main amplifier configured to amplify a first signal; and a peak amplifier configured to amplify a second signal, each of the main amplifier and the peak amplifier including, respectively, a hybrid power device, the hybrid power device including, a first power transistor die configured to amplify signals of a first frequency, and a second power transistor die configured to amplify signals of a second frequency different than the first frequency.




pli

Two mode power converter for audio amplifiers

A power converter with positive and negative supply rail outputs for feeding a single ended class D amplifier, the converter comprising a transformer arrangement, a supply pump reduction arrangement connected between the secondary windings and the positive and negative supply rail outputs, and a boost drive mode switching arrangement. A controller is adapted to control the power converter in a negate drive mode and a boost drive mode, wherein the output voltage in the boost mode is increased by means of the transformer and the boost drive mode switching arrangement. The output voltages on the positive and negative rails can be generated at two different output voltage levels without changing the duty cycle or dead time of the control signals.