Title:
COMPOSITE PARALLEL TYPE AUDIO DIGITAL POWER AMPLIFIER WITHOUT DEAD ZONE DISTORTION
Document Type and Number:
WIPO Patent Application WO/2022/021504
Kind Code:
A1
Abstract:
A composite parallel type audio digital power amplifier without dead zone distortion, comprising a voltage control module (1), an LC circuit (3), a load element RL, and a current supplementation module (2), an input end of the voltage control module (1) being connected to a signal input end VIN and an output end thereof being connected to one end of an inductor L1 of the LC circuit (3), working in a high frequency band, the LC circuit (3) respectively being connected to voltage sampling and current sampling of the voltage control module (1), an input end of the current supplementation module (2) being connected to output current sampling of the voltage control module (1) and an output end thereof being connected to an output end of the voltage control module (1) by means of an inductor L2, for tracking the output current of the power amplifier and providing the current output of the power amplifier such that the output current of the voltage control module (1) fluctuates around 0, the load element RL being arranged at the output end of the LC circuit (3). The switching frequency of the digital power amplification can be increased by several times, correspondingly increasing the output response speed, and the dead zone impact of the voltage control module can be eliminated, improving audio quality.
More Like This:
Inventors:
ZHANG JINLU (CN)
Application Number:
PCT/CN2020/110398
Publication Date:
February 03, 2022
Filing Date:
August 21, 2020
Export Citation:
Assignee:
ZHANG JINLU (CN)
International Classes:
H03F3/217
Foreign References:
| CN101369802A | 2009-02-18 | |||
| CN106416060A | 2017-02-15 | |||
| CN101127510A | 2008-02-20 | |||
| CN102832887A | 2012-12-19 | |||
| CN1835393A | 2006-09-20 | |||
| CN104811151A | 2015-07-29 | |||
| EP3402070A1 | 2018-11-14 | |||
| US20020190789A1 | 2002-12-19 |
Attorney, Agent or Firm:
HANGZHOU ZHEKE PATENT AGENCY (GENERAL PARTNERSHIP) (CN)
Download PDF: