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7315207 Doherty amplifier and its distortion characteristic compensation method  
Pre-distortion compensation circuits (11, 12) are disposed at stages previous to carrier amplifier 13 and peak amplifier 14, respectively. Pre-distortion compensation circuit (11) has such...
7312673 Radial power divider/combiner  
A radial power divider-combiner is disclosed. The divider-combiner includes a divider and a combiner. An input signal is provided to a transmission antenna that radiates the input signal inside...
7307479 Handset radiofrequency front end module in fine pitch quad flat no lead (FQFP-N) package  
An apparatus and method for transmitting signal, the apparatus comprising a front end telecommunications module including a power amplifier, a matching circuit coupled to the power amplifier, and...
7295074 Doherty power amplifier with phase compensation  
A Doherty power amplifier is provided that includes a main amplifier device and an auxiliary amplifier device. The Doherty power amplifier further includes a phase compensation network. The phase...
7295065 High efficiency doherty amplifier with a segmented main amplifier  
A Doherty amplifier that includes a main amplifier device and an auxiliary amplifier device. The main amplifier device includes a plurality of independently controllable amplifier segments. The...
7286017 Controllable RF broadband and amplifier with a constant input impedance  
A variable-gain RF amplifier arrangement whose input impedance is essentially independent of the selected gain is proposed, which has a large number of selectable elementary amplifiers, with an...
7286018 Transistor circuit  
The transistor circuit 1 includes a plurality of transistor cells 10 each having a transistor 11, a base ballast resistor 12, a capacitor 13, and an inductor 14. The transistors 11 have the...
7279971 Composite power amplifier  
A composite amplifier comprises several Chireix pairs (PA11, PA12; PA21, PA22) of power amplifiers connected to a common load. Means (21) are provided for driving each Chireix pair by drive...
7276972 Distributed amplifier  
A distributed amplifier with a simple structure that permits miniaturization of circuit in which the input-side transmission line of the distributed amplifier is constituted by a coplanar line...
7271661 Operation amplifier circuit having digital driving circuitry and analog driving circuitry  
An operational amplifier circuit includes an analog driving circuitry and a digital driving circuitry. The analog driving circuitry is coupled to a load and drives the load according to an input...
7270005 Transducer-based sensor system  
A transducer-based sensor system including a drive signal generator for generating a drive signal, a transducer coupled to the drive signal generator and configured to receive the drive signal, a...
7271657 Traveling wave amplifier  
A traveling wave amplifier comprises a first normally off MOS transistor having a drain, source and gate terminal. The drain terminal is connected to a node of a drain line, which is connected to...
7268627 Pre-matching of distributed and push-pull power transistors  
Pre-matching of distributed push-pull and power transistors enabling the effective use of high-power and high-frequency transistor arrays. In accordance with the invention, a pre-matching element...
7262656 Circuit for parallel operation of Doherty amplifiers  
A circuit is disclosed for operating Doherty amplifiers in parallel in a small size circuit and at a low cost while reducing transmission loss and preventing a narrowed band. The circuit has a...
7256650 VSWR tolerant power detector  
A system is provided for detecting the output power of power amplifier circuitry in a transmitter of a mobile terminal. Balanced power amplifier circuitry is provided having in-phase power...
7254164 Method for transconductance linearization for DC-coupled applications  
A Class AB voltage-to-current converter includes a plurality of DC coupled transconductance stages that produce a linearized output and a biasing circuit. The biasing circuit generates a primary...
7250816 Method and apparatus for combining multiple signals for high efficiency applications  
Methods and apparatus are provided for efficiently combining and filtering a plurality of input signals into a single combined output signal. M number of input signals are received, combined and...
7248108 Power amplifier employing thin film ferroelectric phase shift element  
An amplifier includes a signal splitter operable to receive an input signal and generate at least first and second split signals, a first amplifier adapted to receive the first split signal and to...
7248110 Modified doherty amplifier  
Systems and methods are provided for efficient amplification of a signal utilizing a modified Doherty amplifier system. A modified Doherty amplifier system includes a nonlinear main amplifier and...
7245183 Apparatus, methods and articles of manufacture for processing an electromagnetic wave  
A method of processing an electromagnetic wave comprises regulating at least two independently controllable current sources with a signal determined from at least one characteristic of the...
7233207 System and method for providing an input to a distributed power amplifying system  
A system and a method for providing an input to a distributed power amplifying system are provided. In an embodiment, a distributed power amplifying system includes a plurality of amplifying...
7227418 Power amplifier  
In order to supply a bias voltage to the base terminals of heterojunction bipolar transistors (HBTs) Q1 to Q3 connected in parallel to one another, resistors RB1 to RB3 and heterojunction bipolar...
7224229 Electronic signal amplifier and method and article for determining the gain of such an amplifier  
An embodiment of an electronic signal amplifier comprises a power source, an input inductor, an output inductor and one or more branches connected in parallel between the terminals of the power...
7221219 Composite amplifier structure  
A composite power amplifier structure includes a first power amplifier configured as an auxiliary amplifier of a Doherty amplifier and connected to an output node and an even number of further...
7212072 High linearity smart HBT power amplifiers for CDMA/WCDMA application  
A power amplifier includes larger size transistors to provide higher power gain at lower frequencies. Transistors of transistor unit cells include a horseshoe-shaped emitter and a strip-shaped...
7205846 Radio frequency CMOS amplifier with enhanced linearity and power efficiency  
In general, the disclosure is directed to techniques for enhancing power efficiency and linearity in an RF power amplifier. In accordance with the invention, a combination of different class power...
7196578 Amplifier memory effect compensator  
An input signal is modified to compensate for amplifier memory effects by combining at least two versions of the input signal, each version of the input signal being offset in time with respect to...
7193472 Power amplifier  
In a power amplifier a Doherty amplifier is provided with an output higher harmonic reflection circuit that is connected to the output terminal of a first FET chip and sets an even-numbered higher...
7193473 High power Doherty amplifier using multi-stage modules  
A high power Doherty RF amplifier utilizes multi-stage amplifier modules for both the main amplifier and the peak amplifiers. In one embodiment of a two way two stage amplifier, the first stage of...
7190229 Shared-current electronic systems with precise proportioning  
Shared-current electronic systems (120, 130, 140, 150, 160, 170, 180, 190, and 200) include two or more solid-state electronic devices, such as a solid-state amplifying device (Q1), a baseband...
7183855 Circuit arrangement for the switchable amplification of variable electrical signals  
Circuit arrangement for the switchable amplification of variable electrical signals having at least one signal input and a signal output. A switchable amplifier is present between signal input and...
7180372 High frequency amplifier  
An amplifier for amplifying an input signal in a frequency band, has a quadrature signal divider for dividing the input signal into first and second components. The first component is amplified in...
7176762 Radio frequency power amplifier  
A radio frequency amplifier comprising a circuit board having a boundary shaped in the form of an ellipse and two dielectric layers, a first dielectric layer and a second dielectric layer,...
7170353 Balanced amplifier circuit and high-frequency communication apparatus  
Between an output terminal (drain terminal) of a semiconductor device in a first unit amplifier and an output port, a −90 degrees phase-shift circuit is connected, while between an output terminal...
7161425 Radio frequency power amplifier for lossless power combining  
An amplifier device (40) includes at least one amplifier (42) having an output. A plurality of conductors (48, 50, 52) are coupled to the output in parallel with each other. The plurality of...
7161433 High-frequency amplifier  
A high frequency amplifier includes a constant voltage driven amplifier 1 using as its amplifying element a bipolar transistor 7 with its base biased by a constant voltage, and a constant current...
7158386 Balanced radio frequency power amplifier with temperature compensation  
A radio frequency power amplifier has first and second amplifier transistors. The first and second amplifier transistors have a common element thereof electrically interconnected with a common...
7157965 Summing power amplifier  
A power amplifier comprises an amplification stage comprises a plurality of amplifiers, wherein each amplifier provides an amplified output, and an inductive summing device configured to receive...
7154339 RF power amplifier  
An RF power amplifier according to the invention comprises a plurality of parallel output transistors (HBT,1,1 to HBT,1,N) connected to a power supply. A plurality of base resistors (Rb,1,1 to...
7145386 Configurable input amplifier for position-measuring devices  
A configurable input amplifier for position-measuring devices includes at least one amplifier unit, which has a first input and a second input, as well as a first output and a second output, and...
7142060 Active splitter for multiple reception units  
An active splitter is disclosed for splitting an input signal into a plurality of split output signals. The active splitter may include a plurality of active circuits connected in parallel that...
7138870 System and method for providing a lossless and dispersion-free transmission line  
A lossless (or low loss) transmission line can be constructed using an auxiliary conductor inductively coupled to the primary conductor and driven by the primary conductor through an active shunt...
7132890 System and method for providing distributed amplification  
A distributed amplifier, or if desired, an oscillator can be constructed using an active transmission line. The active transmission line, in turn, can be constructed using an auxiliary conductor...
7126417 Distributed gain network  
A system and method for a distribution network is provided wherein cascaded power amplifiers with bypass switching are disposed along the branches of the network. The amplifiers may have an RF...
7123087 Radio frequency power amplifier  
The present invention provides a radio frequency power amplifier which may not introduce radio frequency loss during switching power amplifier units between high and low output power levels. By...
7123096 Quadrature offset power amplifier  
An amplifier having a first transistor with an output coupled to a common output node and a switch for coupling a control electrode of the first transistor to a first bias source to bias such...
7119621 Power amplifier  
A power amplifier for receiving and amplifying an input signal and outputting an output signal includes N power amplifying units (N is an integer larger than 1) connected in parallel so as to...
7116170 Differential amplifier and calculation amplifier  
In a differential amplifier and an operational amplifier each for amplifying a signal, a differential signal composed of first and second signals is inputted to a couple of input terminals (1, 2)....
7113758 Automatic gain controller  
Disclosed is an automatic gain controller capable of reducing signal saturation or signal distortion caused by out-of-band signals of a filter extracting an object signal or delay of a control...
7109790 High linearity doherty communication amplifier with integrated output matching unit  
A high linearity Doherty power amplifier integrated with output matching circuitry comprised of capacitive elements, inductive elements, and/or shunted transmission lines. In one embodiment, the...