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Title:
ENVELOPE TRACKING METHOD AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/073612
Kind Code:
A1
Abstract:
An envelope tracking method and device. The method comprises obtaining a target envelope tracking input current signal (IA) by means of a boost circuit (303), and transmitting the target envelope tracking input current signal (IA) to an amplifier circuit by means of the boost circuit (303), wherein the amplifier circuit comprises an operation amplifier (301) and a feedback network (302); the operation amplifier (301) operates in the mode of floating ground; and the amplifier circuit performs closed-loop conversion amplification on the target envelope tracking input current signal (IA) to output an envelope tracking output voltage (VOUT). The corresponding envelope tracking device solves the problems in the prior art of high loss and low efficiency of the operation amplifier (301) in a linear amplification process when the envelope tracking output voltage (VOUT) is high in amplitude and great in swinging amplitude; the target envelope tracking input current signal (IA) can be effectively converted and amplified; the conversion efficiency of the operation amplifier (301) is improved; amplification loss is reduced; and user experience is improved.

Inventors:
LI SHENGQI (CN)
WANG LINGUO (CN)
Application Number:
PCT/CN2020/121598
Publication Date:
April 22, 2021
Filing Date:
October 16, 2020
Export Citation:
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Assignee:
ZTE CORP (CN)
International Classes:
H03F1/02
Domestic Patent References:
WO2018023215A12018-02-08
Foreign References:
CN206389368U2017-08-08
CN102684494A2012-09-19
CN110146178A2019-08-20
US20180375476A12018-12-27
Attorney, Agent or Firm:
KANGXIN PARTNERS, P.C. (CN)
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