Title:
FEED FORWARD AMPLIFICATION CIRCUIT, AUDIO AMPLIFIER, AND AUDIO PLAYING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2022/241627
Kind Code:
A1
Abstract:
A feed forward amplification circuit, an audio amplifier, and an audio playing apparatus, which relate to the field of feed forward amplification circuits. The amplification circuit comprises: a main amplifier circuit, an adder circuit, a secondary amplifier circuit, and a subtractor circuit; the main amplifier circuit adds distortion to a first input signal and outputs a distorted signal, and inputs the distorted signal into the adder circuit and the subtractor circuit for performing feed forward correction; the secondary amplifier circuit performs amplification on a second input signal, and serves as a positive input of the subtractor, so as to cause a signal gain output by the subtractor to be equal to a signal gain of the main amplifier; the subtractor circuit takes the distorted signal as a negative input and performs feeding forward after performing inverting amplification on the distorted signal; the adder circuit superposes the distorted signal output by the main amplifier circuit with the distorted signal that underwent inverting amplification output by the subtractor, and outputs a distortion free signal. By means of breaking away from an open loop amplitude-frequency characteristic of a main amplifier and a dependence on a feedback loop, a circuit structure and assembly parameter selection are simplified, and costs are saved.
Inventors:
HE YUEQIU (CN)
YANG HETIAN (CN)
YANG HETIAN (CN)
Application Number:
PCT/CN2021/094208
Publication Date:
November 24, 2022
Filing Date:
May 17, 2021
Export Citation:
Assignee:
GUANGZHOU TOPPING TECH CO LTD (CN)
International Classes:
H03F1/32; H03F1/34; H03F3/181
Foreign References:
| CN1681201A | 2005-10-12 | |||
| CN101674056A | 2010-03-17 | |||
| CN106330111A | 2017-01-11 | |||
| US7106132B1 | 2006-09-12 |
Attorney, Agent or Firm:
CHOFN INTELLECTUAL PROPERTY (CN)
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