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8634789 Multi-mode power amplifier  
A multi-mode power amplifier includes a high-power mode amplifier circuit, a mid-power mode amplifier circuit, and a low power amplifier circuit, where the low-power mode amplifier circuit...
8629722 Doherty amplifier and method for operation thereof  
An amplifier having a Doherty-type architecture and a method for operation thereof are provided. The amplifier comprises a main amplifier path comprising a main amplifier, an auxiliary amplifier...
8629718 Signal splitting apparatus suitable for use in a power amplifier  
Disclosed is a signal splitting apparatus useable in a power amplifier having two or more power amplifiers. The apparatus includes a direct gain component; and a derived gain component connected...
8618878 Multiport amplifier and wireless device using the same  
A multiport amplifier and a wireless device using the same are obtained in which isolation among output terminals is improved, whereby the quality of communication is improved. The multiport...
8618883 N-way doherty distributed power amplifier with power tracking  
A power amplifier using N-way Doherty structure with adaptive bias supply power tracking for extending the efficiency region over the high peak-to-average power:ratio of the multiplexing modulated...
8610503 Apparatus and methods for oscillation suppression  
Apparatus and methods for oscillation suppression are disclosed. In one embodiment, a power amplifier system includes a plurality of power amplifiers for amplifying an input radio frequency (RF)...
8610504 Dual band amplifier  
A dual band amplifier is provided comprising a first matching circuit disposed in a first radiofrequency path between an input port and a first amplifier and a second matching circuit disposed in...
8610502 Re-configurable amplifier  
An amplifier stage in a radar system including an input matching stage, a transistor stage and an output matching stage. At least one of the matching stages includes a switch. Each switch is...
8604881 Efficiency improvement of doherty power amplifier using supply switching and digitally controlled gate bias modulation of peaking amplifier  
An apparatus for amplifying a signal is provided. The apparatus includes a carrier transistor, a peaking transistor, a controller, and a power supply switching unit, wherein the controller...
8604880 Buffering apparatus and method  
The output impedance of an amplifier is substantially matched to an input impedance of a receiver using a buffer circuit. The buffer circuit includes a primary transistor and a secondary...
8598954 Doherty amplifier and semiconductor device  
A Doherty amplifier includes a carrier amplifier including a first FET, the first FET having a plurality of gate electrodes, and a peaking amplifier including a second FET, the second FET having a...
8593219 Method and apparatus for amplifying a radio frequency signal  
A radio frequency (RF) amplifier structure provides highly efficient RF signal amplification across a wide bandwidth, when implemented in both inverting and non-inverting Doherty designs, by...
8587375 Power amplifier linearization method and apparatus  
Disclosed is a method and apparatus for linearizing a power amplifier using a digital signal process (DSP), and particularly, is a method and apparatus for effectively linearizing an amplifier...
8581665 Doherty amplifier  
A Doherty amplifier includes: an input distributor; a coupler; a plurality of Doherty circuit connected between the input distributor and the coupler; wherein each of Doherty circuits has a...
8576010 Apparatus and method for a switched capacitor architecture for multi-band doherty power amplifiers  
An apparatus and method for a switched capacitor architecture for multi-band Doherty power amplifiers are provided. The apparatus is for amplifying Radio Frequency (RF) signals, and the apparatus...
8570103 Flexible multi-channel amplifiers via wavefront muxing techniques  
This invention aims to present a smart and dynamic power amplifier module that features both power combining and power sharing capabilities. The proposed flexible power amplifier (PA) module...
8564366 High-frequency power amplifier device  
Disclosed is a high-frequency power amplifier device capable of reducing a talk current. For example, the high-frequency power amplifier device has first and second power amplifier circuits, first...
8564367 Power amplifier  
The invention relates to improving the performance of load modulation power amplifiers through the use of coupled transmission line-based power combiners. Exemplary embodiments disclosed include a...
8565341 Power amplifier and semiconductor integrated circuit  
In general, according to one embodiment, a power amplifier includes an envelope detector, a limiter, and a combiner. The envelope detector is configured to sense an envelope component of an input...
8558620 Radial power amplification device with phase dispersion compensation of the amplification paths  
A radial power combination system is provided. The system comprises a radial divider comprising ports in the form of rectangular waveguides on the periphery, a radial combiner superposed on the...
8558613 Apparatus and method for digitally-controlled automatic gain amplification  
Apparatus and methods are disclosed, such as those involving a receiver device. One such apparatus includes an equalizer configured to process an input signal transmitted over a channel. The...
8547177 All-digital switched-capacitor radio frequency power amplification  
Disclosed herein is an improved power amplifier, referred to as a Switched-Capacitor Radio Frequency Power Amplification (SCPA). The SCPA may be fabricated with scale CMOS technology. The SCPA may...
8547174 Broadband linearizer with combined second and third order generation with adjustable tilt  
Systems and methods can provide an improved broadband linearizer that includes a distortion generator with a bypass path for generating both composite triple beat (CTB) and composite second order...
8547172 Optical transmitter with multiple isolated inputs and signal combining network  
Systems and methods can provide an optical transmitter/combiner having improved isolation and signal to noise ratio performance. The input ports can be amplified with single ended amplifiers,...
8536948 Power amplifier  
A power amplifier according to the present invention includes: an input-side transformer which has an annular primary coil which is a first metal line and a plurality of linear secondary coils...
8526536 Quad LINC transmitter with switchable Chireix amplifiers  
A transmitter (200) comprises a first Chireix compensation circuit (230, 232, 238, 240) and a second Chireix compensation circuit (234, 236, 238, 240), wherein each Chireix compensation circuit...
8525594 Radio frequency amplifier circuit  
A radio frequency amplifier circuit according to the present invention is for providing a radio frequency amplifier circuit with high output and high efficiency, and includes (i) a first harmonic...
8521221 Dual mode RF transceiver and receiving method of the same  
A dual mode RF transceiver is provided. The dual mode RF transceiver comprises an antenna, a differential low noise amplifier (LNA), a local oscillator and a dual mode differential mixer. The...
8519787 High frequency amplifier, wireless device, and control method  
Provided is a high frequency amplifier that can suppress from increasing the circuit size while improving efficiency at the time of low output. A high frequency amplifier according to one aspect...
8519795 High frequency power amplifier  
A high frequency power amplifier includes: a first transistor for amplifying an input high-frequency signal; a second transistor for amplifying an output signal of the first transistor; a third...
8508295 Amplifier  
A amplifier that obtains an output by power combining, comprising; a distribution circuit that distributes an input signal into two signals; a first amplifier circuit that amplifies one of the two...
8508299 High-frequency power amplifier  
There is a need to provide a high-frequency power amplifier capable of reducing a talk current and reducing a phase deviation in output. The high-frequency power amplifier includes differently...
8508296 Tunable directional power combiner  
A quadrature amplifier comprises first and second amplifiers, each having an input and an output, a signal splitter connected to the inputs of the two amplifiers, a signal combiner connected to...
8497738 Broadband power combining method and high power amplifier using same  
A broadband power combining method comprises the steps of converting desired voltage or current relation over a specified frequency band to specified polynomial transfer equation; steps of...
8493152 Power amplifier  
A power amplifier comprises a plurality of primary inductors provided on a substrate in a circular geometry as a whole; a plurality of amplifier pairs; a secondary inductor; and a connection...
8487703 Radiofrequency amplifier  
An integrated radiofrequency amplifier with an operational frequency includes first and second Doherty amplifiers each having a main device, and a peak device connected at respective inputs and...
8482348 Class of power amplifiers for improved back off operation  
One embodiment of the present invention relates to a power amplifier comprising a plurality of amplifying elements connected in a serial-parallel matrix configuration, containing parallel columns...
8482353 Doherty amplifier  
A combination amplifier, in particular a Doherty amplifier allowing dynamic biasing, is provided, the combination amplifier comprising a first amplifier (3,3a,3b) having a first input terminal...
8471638 Doherty amplifier  
An amplifier includes a Doherty amplifier composed of a distributor distributing an input signal to two signals, a carrier amplifier that receives one of the two signals and has a first FET, a...
8466746 Three-stage GaN HEMT doherty power amplifier for high frequency applications  
A three-stage GaN HEMT Doherty power amplifier for high frequency applications includes: a carrier amplifier; first and second peaking amplifier; a 10-dB power divider configured to divide an...
8465432 Active transducer probes and circuits  
In an example embodiment, a method for bidirectional signal propagation comprises: a) sensing a voltage level of a first signal at a first port; b) coupling the first port to an output of an...
8456239 Amplifying unit, power amplifier and transmitter  
A power amplifier, which includes n+1 amplifying units coupled in parallel, where n is an integer greater than or equal to 0, third input ends VR(i) of the n+1 amplifying units are coupled to a...
8456238 Tapered attenuator network for mitigating effects of direct current (DC) bias inductor self-resonance in traveling wave amplifiers  
A traveling wave amplifier includes a tapered attenuator network for mitigating the effects of DC bias inductor self-resonance. The amplifier includes a gain stages connected in a ladder network...
8456241 Method and apparatus for improving amplifier linearity  
Aspects of the disclosure provide an amplifier. The amplifier includes a first path, a second path and a drain bias circuit. The first path includes a first transistor that operates in a...
8451062 Radiation hardened differential amplifier  
This disclosure is directed to techniques for preventing or reducing perturbations of an output signal of a differential amplifier caused by ionizing radiation incident upon the amplifier. The...
8446218 Power amplifier and transmitter  
A power amplifier is provided, which includes a power dividing unit, a first power amplification tributary, a second power amplification tributary, and an impedance conversion unit. Input ends of...
8441321 Multi-stage amplifier  
The disclosed multi-stage amplifier (200) comprises several amplifier stages (201-203) which, together with an output network, form different branches. A first branch comprises a first and a...
8432218 Harmonic-rejection power amplifier  
A harmonic-rejection power amplifier is disclosed. In an embodiment, the harmonic-rejection power amplifier includes a plurality of stages, each stage comprising a respective signal-generation...
8427231 Amplifying device and amplifying method  
An amplifying device includes a signal separating unit that separates a first signal and a second signal from an input signal; a first signal-generating unit that generates, based on the first...
8421539 Multi-mode high efficiency linear power amplifier  
A power amplifier includes a plurality of amplification paths in which at least one amplification path is selectively enabled and disabled, wherein each amplification path includes an output...