Title:
AUDIO AMPLIFICATION CIRCUIT AND PLAYBACK DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/128991
Kind Code:
A1
Abstract:
The present application relates to an audio amplification circuit and a playback device. The audio amplification circuit comprises: a player, a comparator, a digital circuit, a weighted adder and a filter. One original audio signal passes through the filter to obtain a filtered signal, and the other original audio signal passes through the weighted adder and is weighted added to the filtered signal to obtain a weighted added signal, and the weighted added signal successively passes through the comparator, the digital circuit and the player to output an audio signal. The audio amplification circuit performs feedforward processing on signals entering the comparator and the digital circuit, thus improving the linearity of the signals, and improving the quality of audio signals.
Inventors:
SONG YIWEI (CN)
ZHOU TAO (CN)
ZHOU TAO (CN)
Application Number:
PCT/CN2020/116571
Publication Date:
July 01, 2021
Filing Date:
September 21, 2020
Export Citation:
Assignee:
RDA MICROELECTRONICS SHANGHAI CO LTD (CN)
International Classes:
H04R3/00; H03H11/12
Foreign References:
| CN210274516U | 2020-04-07 | |||
| CN210518805U | 2020-05-12 | |||
| CN102378085A | 2012-03-14 | |||
| CN102291094A | 2011-12-21 | |||
| CN103634726A | 2014-03-12 | |||
| CN108347670A | 2018-07-31 | |||
| US8103010B2 | 2012-01-24 |
Attorney, Agent or Firm:
LEADER PATENT & TRADEMARK FIRM (CN)
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