Title:
SIGNAL GENERATING CIRCUIT AND AUDIO PROCESSING DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/133850
Kind Code:
A1
Abstract:
The present invention relates to a signal generating circuit and an audio processing device. The circuit comprises a switch module, a voltage producing module, and a signal generating module; the switch module is connected to the voltage producing module, comprises at least one control switch, and is used for receiving a frequency division signal, and under the action of the frequency division signal, the at least one control switch is turned on or turned off; the voltage producing module is separately connected to the switch module and the signal generating module and used for producing a first voltage and a second voltage, wherein the at least one control switch controls the first voltage and the second voltage to change; and the signal generating module is connected to the voltage producing module and used for generating a carrier signal with the same frequency as the frequency division signal according to the received first and second voltages. By generating the carrier signal with the same frequency as the frequency division signal, the signal aliasing and interference phenomena of the audio processing device can be reduced, and the design cost of the circuit is saved.
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Inventors:
SHI JUNLIANG (CN)
CHENG JIANPING (CN)
LI MENGZHANG (CN)
LU WENXIAN (CN)
CHENG JIANPING (CN)
LI MENGZHANG (CN)
LU WENXIAN (CN)
Application Number:
PCT/CN2019/084767
Publication Date:
July 02, 2020
Filing Date:
April 28, 2019
Export Citation:
Assignee:
SPREADTRUM COMMUNICATIONS SHENZHEN CO LTD (CN)
International Classes:
H04R3/00; H03K4/06
Foreign References:
| CN101103528A | 2008-01-09 | |||
| JP2004072657A | 2004-03-04 | |||
| CN202563884U | 2012-11-28 | |||
| CN105472507A | 2016-04-06 |
Attorney, Agent or Firm:
LINDA LIU & PARTNERS (CN)
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