Power amplifier equalizer

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12237813
APP PUB NO 20240146249A1
SERIAL NO

18503814

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Abstract

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Circuits and methods for achieving good AM-AM and AM-PM metrics while achieving good power, PAE, linearity, and EVM performance in an amplifier. Embodiments provide an equalization approach which compensates for AM-AM and AM-PM variations in an amplifier by controlling bias voltage versus output power to alter the AM-AM and AM-PM profiles imposed by the amplifier. Differential amplifier embodiments include cross-coupled common-gate transistors that generate an equalization voltage that alters the gate bias voltage of respective main FETs in proportion to a power level present at the respective drains of the main FETs. Single-ended amplifier embodiments include an equalization circuit that alters the bias voltage to the gate of a main FET in proportion to a power level present at the main FET drain. Embodiments may also include a linearization circuit which alters the AM-PM profile of an input signal to compensate for the AM-PM profile imposed by a coupled amplifier.

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Patent Owner(s)

  • MURATA MANUFACTURING CO LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Salameh, Daoud Reading, GB 8 21

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