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US Patent 9520907 Methods and apparatus for envelope tracking system

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Patent attributes

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

Patent Inventor Names

Paul Cheng Po Liang0

Chia-Sheng Peng0

Sheng-Hong Yan0

Wei-Cheng Liu0

Date of Patent

December 13, 2016

Patent Application Number

14181714

Date Filed

February 16, 2014

Patent Citations Received

US Patent 12063018 Envelope tracking integrated circuit operable with multiple types of power amplifiers

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US Patent 12126305 Radio frequency (RF) equalizer in an envelope tracking (ET) circuit

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US Patent 12081173 Complementary envelope detector

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US Patent 11716057 Envelope tracking circuitry

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US Patent 12068720 Barely Doherty dual envelope tracking (BD2E) circuit

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US Patent 11909385 Fast-switching power management circuit and related apparatus

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Patent Primary Examiner

Patent abstract

A communication unit comprises a radio frequency, RF, transmitter comprising: a power amplifier, PA, module; an envelope tracking system operably coupled to the PA module and arranged to variably control a supply voltage for the PA module; and a load control system operably coupled to an output of the PA module and arranged to control a power amplifier output load.

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