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FET amplifier

About: FET amplifier is a research topic. Over the lifetime, 7048 publications have been published within this topic receiving 77549 citations.


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Patent
07 Jun 2002
TL;DR: In this article, a matching network coupled to the output of the microwave power amplifier is proposed to improve isolation between the amplifiers to minimize the dependence of each amplifier's inter-modulation (IM) performance on the others.
Abstract: A microwave amplifier and more particularly to a microwave amplifier configured as a Doherty amplifier. In particular, the amplifier includes a carrier amplifier, a peak amplifier a Lange coupler at the input of the amplifiers and quarter wave amplifier at the output of the amplifiers. In order to improve isolation between the amplifiers to minimize the dependence of each amplifier's inter-modulation (IM) performance on the others, matching networks are provided, coupled to the output of the amplifiers. In addition, the microwave power amplifier includes electronic tuning which allows for improved inter-modulation distortion over a wide input power dynamic range, which allows the IM performance of the microwave amplifier to be adjusted for the operating frequency of the amplifier.

67 citations

Patent
12 Jun 2003
TL;DR: In this article, an integrated RF front-end architecture with a multi-tap balun, a low-noise amplifier and a power amplifier core is presented, where the low noise amplifier is coupled to a first set of taps of the symmetrical multiameter secondary winding and can be a two-stage amplifier having a driver stage and an output stage.
Abstract: An integrated RF front-end architecture is disclosed. Such an integrated RF front-end architecture includes a multi-tap balun, a low noise amplifier and a power amplifier core. The multi-tap balun includes a single-ended primary winding and a symmetrical multi-tap secondary winding, wherein the single-ended primary winding is operably coupled to an antenna. The low noise amplifier is coupled to a first set of taps of the symmetrical multi-tap secondary winding. The power amplifier core is coupled to a second set of taps of the symmetrical multi-tap secondary winding and can be a two stage amplifier having a driver stage and an output stage. The multi-tap balun, low noise amplifier and power amplifier core can be on-chip components or can be fabricated to be discrete components on a printed circuit board.

67 citations

Patent
04 May 2004
TL;DR: In this paper, a method and apparatus for linear amplification of a modulated carrier signal or multi-carrier signal is described, where a second current source coupled to the amplifier output load is turned on just before the amplifier reaches a nonlinear regime and reduces the effective load to prevent the amplifier from allowing sufficient power to reach the non-linear regime near saturation.
Abstract: A method and apparatus for linear amplification of a modulated carrier signal or multi-carrier signal is disclosed. The linearity of the amplifier is improved by employing dynamic load line adjustments. A second current source coupled to the amplifier output load is turned on just before the amplifier reaches a nonlinear regime and reduces the effective load to prevent the amplifier allowing sufficient power to reach the nonlinear regime near saturation. The technique is particularly advantageous for amplification of a signal with large peak to average ratio.

67 citations

Patent
06 Jul 1984
TL;DR: A power amplifier having plural parallel amplification circuits of different gains selectively actuable to zero and maximum gains, and electronic switches to select a circuit for connection to a common output junction, was introduced in this article.
Abstract: A power amplifier having plural parallel amplification circuits of different gains selectively actuable to zero and maximum gains, and electronic switches to select a circuit for connection to a common output junction.

67 citations

Patent
Mel Bazes1
13 Nov 1989
TL;DR: In this paper, a self-biasing scheme is used to provide negative feedback to the amplifier in order to assist in providing a common-mode rejection but providing high gain amplification for differential-mode amplification.
Abstract: A CMOS complementary, self-biased, differential amplifier provides for a rail-to-rail common-mode input-voltage range of operation. A self-biasing scheme is used to provide negative feedback to the amplifier in order to assist in providing a common-mode rejection but providing high gain amplification for differential-mode amplification.

67 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20231
20227
20211
20202
20193
20184