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8253494 Doherty amplifier with composed transfer characteristic having multiple peak amplifiers  
A combination amplifier (1,1a) is provided which comprises a carrier amplifier (7,7a) and a series connection of a first peak amplifier (9,9a) and a second peak amplifier (11,11a) which are...
8253495 Wireless communication device and semiconductor package device having a power amplifier therefor  
A semiconductor package device comprises a first amplifier block, at least one further amplifier block operably coupled in parallel with the first amplifier block between a common input and a...
8242846 Power amplifier  
There is provided a power amplifier capable of improving harmonics characteristics of an output signal of an amplifier circuit by compensating a phase of the output signal. A power amplifier...
8242838 Amplifier with wide gain range  
An amplifier with wide gain range includes a signal converting unit, a channel unit, and multiple amplifiers. The signal converting unit receives a gain modulation signal and accordingly outputs...
8242847 Method and apparatus for improving amplifier linearity  
Aspects of the disclosure provide an amplifier. The amplifier includes a first path configured to generate a first current that has a first polarity third-order coefficient corresponding to an...
8242855 Multi-primary distributed active transformer amplifier power supply and control  
An integrated power combiner is disclosed. The power combiner includes a first circular geometry primary winding having one or more inductive elements, such as an active winding with one or more...
8237496 Switching amplifier with enhanced supply rejection and related method  
Disclosed is a switching amplifier having an enhanced supply rejection. The switching amplifier comprises a digital modulator that provides a modulated signal. The switching amplifier further...
8237503 Output stage for a digital RF transmitter, method for providing an RF output signal in a digital RF transmitter, and digital RF transmitter  
An output stage (1) for a digital RF transmitter is provided. The output stage comprises: an input adapted to receive an input signal (RFin, b7-b0) to be transmitted; a plurality N of power...
8237506 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...
8237501 Power amplifier with transistor input mismatching  
A power amplifier includes an input module. The input module includes a transformer and is configured to receive a radio frequency signal and generate output signals. Impedance transformation...
8237498 Doherty amplifier system and transmitter using the same  
According to an embodiment, a Doherty amplifier system has a first Doherty amplifier and a second Doherty amplifier. The first Doherty amplifier operates in a SISO communication mode and in a MIMO...
8232834 Boosting xDSL amplifier supply power on-demand  
Systems and methods for increasing amplifier supply power on demand for a plurality of xDSL signals is provided. In an embodiment, circuitry may be used to detect the signal or signals having the...
8228123 Integrated Doherty amplifier  
The invention relates to an integrated Doherty amplifier with an input network connecting the input to the main stage and to the peak stage, and with an output network connecting the main stage...
8222956 Amplifying device and signal processing method based on amplifying device  
An amplifying device and a signal processing method based on an amplifying device are provided, capable of reducing performance requirements of modules and reducing design difficulty of the...
8212614 Class AB output stages and amplifiers including class AB output stages  
A buffer stage includes a flipped voltage follower and an emitter follower. The flipped voltage follower is connected between a high voltage rail and a low voltage rail and includes an input and...
8207790 High frequency power amplifier  
A high frequency power amplifier includes first and second transistors connected in parallel and amplifying a high frequency signal; a first switch connected to outputs of the first and second...
8203386 Reconfigurable outphasing Chireix amplifiers and methods  
Various embodiments relate to a reconfigurable integrated digital Chireix out-phasing power amplifier for use in high power base stations is described and a related method of said design. The...
8198938 Broadband power amplifier  
A broadband power amplifier is embodied by realizing a substantially two-section output matching circuit or a substantially two-section input matching circuit using a quarter wave transformer...
8193857 Wideband doherty amplifier circuit  
An amplifier circuit includes a signal summing node, a first amplifier configured to operate in a first mode, an impedance inverter, a second amplifier configured to operate in a second mode and a...
8188789 Apparatus for improving performance at low power region in a Doherty amplifier  
A method and apparatus improve the performance of a carrier amplifier in a Doherty amplifier. The Doherty amplifier includes a power divider, a carrier amplifier, at least one peaking amplifier,...
8188788 Systems and methods for a discrete resizing of power devices with concurrent power combining structure for radio frequency power amplifier  
Systems and methods are provided for discrete resizing of power devices. The systems and methods can include a plurality of unit power amplifiers arranged in parallel, where each unit power...
8183930 Power amplifier device  
This invention provides a power amplifier device that satisfies both of delivering a high output and reducing the chip area occupied by the power amplifier device. The power amplifier device...
8183929 Multi-chip doherty amplifier with integrated power detection  
In accordance with an exemplary embodiment of the present invention, a Doherty amplifier is provided for applications in radio frequency, microwave, and other electronic systems. An exemplary...
8179195 Current-feedback instrumentation amplifiers  
Current-feedback instrumentation amplifiers that include dynamic element matching for the input transconductance amplifiers by periodically swapping the transconductance amplifiers between the...
8180303 Power amplifier architectures  
Implementations and examples of power amplifier devices, systems and techniques for amplifying RF signals, including power amplifier systems based on Composite Right and Left Handed (CRLH)...
8174322 Power control of reconfigurable outphasing chireix amplifiers and methods  
Various embodiments relate to a reconfigurable integrated digital Chireix out-phasing power amplifier for use in high power base stations is described and a related method of said design. The...
8169264 Distributed Doherty amplifiers  
Doherty and distributed amplifier (DA) designs are combined to achieve, wideband amplifiers with high efficiency dynamic range. A modified Doherty amplifier includes a wideband phase shifter...
8155606 RF power amplifier device and wireless communication terminal device  
A RF power amplifying device is constituted by a system of a balanced amplifier including first phase shifters, a first RF power amplifier, a second RF power amplifier, second phase shifters, and...
8154339 V-band high-power transmitter with integrated power combiner  
A wireless communications system includes a first multiplexer distribution network fed by a radio frequency input; a plurality of multi-stage power amplifiers fed by the first multiplexer...
8149060 Low distortion amplifier and Doherty amplifier using low distortion amplifier  
Provided is a low distortion amplifier which can satisfy both securement of a setting space in a vicinity of a transistor and low impedance. The low distortion amplifier includes a short stub...
8138829 Segmented power amplifier with varying segment activation  
Various apparatuses and methods for varying segment activation in a segmented power amplifier are disclosed herein. For example, some embodiments provide a power amplifier including an input, an...
8134409 Radio frequency power amplifier  
A radio frequency power amplifier includes an input terminal to which a radio frequency signal is applied; a first hetero-bipolar transistor (HBT), which amplifies the radio frequency signal; a...
8130043 Multi-stage power amplifier with enhanced efficiency  
A multi-stage RF/Microwave power amplifier circuit is provided that is capable of operating efficiently at multiple output power levels. The amplifier comprises first and second amplifying stages,...
8130040 Power amplifier with two transistors and traces forming two transformers  
Methods to implement low cost, high efficiency, low loss power combiner with novel matching circuits are disclosed. A narrow band power combiner enables a high power and high efficiency radio...
8130041 Power amplifier device  
Provided is a power amplifier device. The power amplifier device includes: a cutoff unit cutting off a direct current (DC) component of a signal delivered from a signal input terminal; a circuit...
8125276 Sharing of inductor interstage matching in parallel amplification system for wireless communication systems  
A power amplifier system can include a plurality of driver amplifiers and a plurality of power amplifiers, where each driver amplifier and power amplifier includes at least one respective input...
8125271 Power amplifier and bridge circuit in power amplifier  
A power amplifier and a bridge circuit in a power amplifier, thereinto, the power amplifier includes a comparator, a bridge circuit and a low-pass filter. The comparator is adapted to receive a...
8120424 Class AB output stages and amplifiers including class AB output stages  
A buffer stage includes a flipped voltage follower and an emitter follower. The flipped voltage follower is connected between a high voltage rail and a low voltage rail and include an input and an...
8115554 Semiconductor device  
According to one embodiment, there is a semiconductor device including a first active element, a second active element connected in parallel with the first active element, and a first...
8115546 Apparatus and method for maximizing performance of peaking amplifier in doherty amplifier  
An apparatus and method for maximizing the performance of a peaking amplifier in a Doherty amplifier are provided. The apparatus includes a splitter, a carrier amplifier, an (N−1) number of...
8111098 Segmented linear FM power amplifier  
Various apparatuses and methods for amplifying an FM signal in a segmented linear power amplifier are disclosed herein. For example, some embodiments provide an apparatus including a signal input,...
8106711 Stacked pre-driver amplifier  
A stacked pre-driver stage and a power amplifier including the stacked pre-driver stage are described. The stacked pre-driver stage comprises stacked pre-drivers arranged in series between a...
8102206 Multi-path, multi-stage feed-forward operational amplifier circuit  
An embodiment of an amplifier circuit includes a plurality of amplifiers connected between input and output terminals to form at least partially parallel amplification paths between the terminals....
8102213 Multi-mode low noise amplifier with transformer source degeneration  
A multi-mode low noise amplifier (LNA) with transformer source degeneration is described. In an exemplary design, the multi-mode LNA includes first, second, and third transistors and first and...
8098092 Power amplifier  
A Doherty amplifier is provided with a clipping circuit for making signal power flow to ground if the signal power becomes equal to or higher than a predetermine value in order to prevent a...
8095092 Power efficient transmitter with high dynamic range  
One embodiment of the present invention relates to a method for transistor matching. The power transmitter comprises a first, second, and third amplification path. The paths are selectively...
8076976 Semiconductor device  
The present invention provides a technology capable of achieving an improvement in the characteristic of a power amplifier when a power amplifier mounted onto mobile communication equipment such...
8078446 Linear time-invariant system modeling apparatus and method of generating a passive model  
A linear time-invariant system modeling apparatus comprises a processing resource arranged to receive, when in use, model data constituting to a model of a linear time-invariant system. The model...
8072264 Amplifying device  
The present invention concerns a composite amplifier and a method for controlling the amplitude of a composite amplifier in a node of a wireless communication system. The composite amplifier...
8064555 Input/output multi-level channelizer amplifier  
A system includes an input multi-level channelizer, an output multi-level channelizer, and more than one amplifiers connected between the input and output channelizers. The input and output...