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6111459 Multi mode power amplifier and communication unit  
A power amplifier including: a first amplifier having an input terminal and an output terminal; a passive circuit PC3 having an input terminal and an output terminal; and a first switch SW2 having...
6107887 Differential to single-ended video cable driver having BICMOS current-mode operational amplifier  
A two-stage differential to single-ended amplifier. The input stage converts a differential voltage to a differential current. A first pair of bipolar input transistors are biased with constant...
6104247 Power amplifier for mobile communication system  
A power amplifier for a radio communication system is provided which includes a divider for equally dividing a received signal into two signals, an amplifier for separately amplifying the divided...
6094097 Programmable RF power combiner  
A programmable combiner including a first terminal providing a radio frequency input signal, a second terminal providing a radio frequency output signal, a plurality of linear amplifiers in...
6085074 Apparatus and method for amplifying an amplitude-varying signal  
An amplifier (300) comprising two amplifier stages (301, 303), a signal splitter (305), and a signal combiner (307) amplifies an amplitude-varying input signal (128) in the following manner. The...
6070063 Transmitting apparatus and method of adjusting gain of signal to be transmitted, and receiving apparatus and method of adjusting gain of received signal  
A transmitting apparatus which can suppress unnecessary power consumption. An optimal signal line is selected from a plurality of signal lines (53-56) having different gains provided by respective...
6069797 Power distribution assembly  
A power distribution assembly (100) that comprises at least two direct current power supplies (106, 107), at least three signal splitter modules (102-104), wherein each signal splitter modules...
6064264 Backgate switched power amplifier  
A switched power amplifier circuit employs non-linear amplifier stages including MOSFET transistors. The transistors each have source, gate, drain and backgate terminals. An input Rf signal is...
6054894 Digital control of a linc linear power amplifier  
The inventive LINC amplifier provides substantially linear amplification from two nonlinear amplifiers by decomposing the original signal into two constant amplitude envelope, phase varying...
6055418 Computer program product configured to control modular transmission system components  
A computer program product is configured to control a modular transmission system having a control processor and at least N power amplifier modules, each having a controller submodule, wherein the...
6054900 Power amplifier MMIC and mobile communication terminal  
A power amplifier MMIC has a first stage amplifier circuit having a transistor and matching circuits provided on input and output sides of the transistor; a plurality of final stage transistors...
6049251 Wide-dynamic-range variable-gain amplifier  
A very-wide-dynamic-range amplifier with very low-noise in the high-gain mode and very high-input-overload in the low-gain mode. The amplifier utilizes two parallel signal paths, one a high-gain,...
6049229 Self-biasing CMOS PECL receiver with wide common-mode range and multi-level-transmit to binary decoder  
A pseudo-emitter-coupled-logic (PECL) receiver has a wide common-mode range. Two current-mirror CMOS differential amplifiers are used. One amplifier has n-channel differential transistors and a...
6037840 Article comprising a combiner-splitter  
A multicarrier linear RF power amplifier incorporating an improved signal splitter and an improved signal combiner is disclosed. The amplifier comprises a plurality of wedge-shaped amplifier...
6034568 Broadband dc amplifier technique with very low offset voltage  
An operational amplifier with two differential input stages is used to separately achieve low offset voltage and broad bandwidth characteristics. One input stage addresses dc and low frequency...
6028485 Power amplification apparatus and method therefor  
A method and apparatus for efficiently amplifying input signals includes multiple amplifiers (20, 30). Each amplifier receives a signal from a power divider (12) where the input signal is split...
6028486 Method and apparatus for reducing power dissipation in multi-carrier amplifiers  
A method and apparatus are provided for reducing power dissipated by an amplifier circuit such as a line driver in a Digital Subscriber Line (DSL), a power amplifier in a radio environment, etc....
6028484 Ultrasound apparatus and method for amplifying transmit signals  
A method and system for amplifying an ultrasonic transmit signal is provided. A first amplifier stage has a first supply voltage input and receives transmit signals. A second amplifier stage has a...
6028483 Universal fixture/package for spatial-power-combined amplifier  
A combined test fixture and spatial-power-combined amplifier includes a base, a first waveguide mounting flange engaged to said base, a second waveguide mounting flange engaged to said base, a...
6023612 Modular transmission system and method  
A modular broadband transmission system and method include an input signal connector that receives an input signal which is then divided into N parts and amplified with an amplifier have N power...
6018270 Low voltage RF amplifier and mixed with single bias block and method  
A single bias block for a single or multiple low voltage RF circuits including one or more amplifiers and one or more single or double balanced mixers with compensation for temperature and...
6005442 Divider/combiner  
A divider/combiner circuit for dividing or combining radio frequency power applicable to communication units utilizing a microwave band or the like. The divider/combiner circuit includes first,...
5994965 Silicon carbide high frequency high power amplifier  
A high power amplifier (10) includes intelligent independent fault tolerant amplifying modules (11). Each of the modules (11) includes a power amplifier (17) having a plurality of silicon carbide...
5990750 Amplifier and driver system with multichannel operation  
An RF amplifier includes a FET output stage and a driver. The FET is subject to long-term degradation in multiple-carrier use if its average gate current often exceeds a predetermined value. The...
5990737 Balanced amplifier using single-ended output operational amplifiers  
A balanced amplifier includes first and second multi-input single-ended output differential amplifiers having matched characteristics and a feedback circuit. The feedback circuit connects...
5986518 Distributed MMIC active quadrature hybrid and method for providing in-phase and quadrature-phase signals  
A distributed MMIC active quadrature hybrid (10) provides in-phase (I) and quadrature-phase (Q) outputs (22, 24) over an octave bandwidth. The quadrature hybrid includes in-phase and...
5986510 Method and apparatus for amplifying input signals in one of multiple modes of resolution  
Outputs from an array of input signals are amplified by an amplification section, sampled and multiplexed onto an analog bus. Amplifiers in the amplification section are segregated into groups....
5977827 Circuit arrangement including a differential amplifier stage  
A circuit arrangement includes a first differential amplifier stage with two amplifier members whose main current paths are coupled to one another and, via a first reference current source, to a...
5977828 Multiple-tail transconductance switchable gain amplifer  
This invention relates to variable gain amplifiers. The general technique described consists of adding gain elements in parallel in order to create multiple-gain amplifier stages versus the usual...
5973567 Tunable impedance matching network for a mic power amplifier module  
The output impedance matching network of a power amplifier module is improved by the addition of an intermediate set of bonding pads in close proximity to a power transistor in the power amplifier...
5973568 Power amplifier output module for dual-mode digital systems  
A power amplifier output module 200 having low insertion loss and self-shielding properties for dual-mode digital systems is provided. Module 200 has a first power amplifier drive circuit...
5955926 Power amplifier and chip carrier  
A plurality of FETs have their respective gates connected to each other through a first line and their respective drains connected to each other through a second line. A gate bias is applied to...
5952886 MMIC power amplifier with diagonal circuitry  
A multistage MMIC power amplifier with diagonal oriented field effect transistors (FETs) provides higher power output for a smaller MMIC die size. Corporate feed structures divide the RF input...
5949287 Power amplifier  
In a power amplifier including an input matching circuit; an output matching circuit; and first and second transistors receiving a gate bias and a drain bias, the transistors having the same...
5942939 Amplifier and method of canceling distortion by combining hyperbolic tangent and hyperbolic sine transfer functions  
A differential amplifier (10) receives a differential input signal (VIN). The input signal is attenuated by a first attenuator (12) and applied to a tan h amplifier (16). The input signal is also...
5942944 Low loss based power divider/combiner for millimeter wave circuits  
A power divider/combiner is formed from multimode dielectric waveguides in hich energy in a single mode is translated into a plurality of modes in the multimode waveguide, each mode is separately...
5920230 HEMT-HBT cascode distributed amplifier  
A distributed amplifier formed from high electron mobility transistors (HEMTs) and a heterojunction bipolar transistor (HBT) configured in a cascode arrangement in which a common source FET, such...
5920240 High efficiency broadband coaxial power combiner/splitter with radial slotline cards  
A high-powered, solid state microwave and millimeter wave, power combiner and divider is provided by using a plurality of radially oriented tapered slotline cards disposed in a center cylindrical...
5917370 Split load resistor for wideband preamplifier for magneto-resistive head  
A switch (380) couples one group of MR channels (340, 342, 344) while decoupling another group of MR channels (340, 342 and 344). Thus, the parasitic capacitance associated with the decoupled...
5903854 High-frequency amplifier, transmitting device and receiving device  
A radio frequency amplifier, for amplifying a radio frequency signal, comprises a plurality of active element groups, each comprising one or more active elements for amplifying a signal, with...
5903191 Digitally controlled variable transconductance amplifier system  
A digitally controlled variable transconductance amplifier system including first and second input means for receiving first and second input voltages of opposite phase; first and second output...
5903185 Hybrid differential pairs for flat transconductance  
Hybrid differential pairs and methods of their hybridization by connecting and operating in parallel a degenerated differential pair with a multitanh. Proper matching of the degenerated...
5901345 Transmitter of wireless system and high frequency power amplifier used therein  
The output of a digital modulator is put into a power amplifying device, is distributed into n pieces in an n-power divider in the power amplifier, passes through n input phase shifters differing...
5896062 Amplifier with switched DC bias voltage feedback  
In an amplifier circuit, bias feedback to an amplifying transistor is provided by interconnecting the DC bias voltage applied to the transistor output and the transistor input with a feedback...
5896065 Radially combined RF/microwave power amplifier  
A radially combined RF/Microwave amplifier includes an input divider for dividing the input power signal into "N" input signals, and a single matching/combiner circuit configuration for matching...
5886577 Apparatus for efficient current amplification  
Two emitter follower transistors (260, 250), in which each transistor has an emitter coupled to one of the collectors of a differential pair structure (230, 240)to form two stacked transistor...
5880633 High efficiency power amplifier  
A high efficiency power amplifier 600 consists of a non-linear radio frequency (RF) Doherty power amplifier (67) and a linearization circuit, such as, for example, a Cartesian Feedback circuit...
5872481 Efficient parallel-stage power amplifier  
An amplifier circuit for providing an amplified signal in response to an input signal. The amplifier circuit includes an input network for applying the input signal to a selected at least one of a...
5861776 High efficiency RF amplifier  
An RF power amplifier system is provided including a plurality of the DC voltage sources of different magnitudes. An RF source provides an RF drive signal. N RF actuatable power amplifiers are...
5838201 Solid state power amplifier with planar structure  
A solid state power amplifier which combines the output of several power modules by means of a waveguide radial combiner. The physical structure of the amplifier is such that the power modules lay...