Title:
PULSE WIDTH MODULATION CIRCUIT FOR OUT OF AUDIO SIGNAL
Document Type and Number:
WIPO Patent Application WO/2024/011928
Kind Code:
A1
Abstract:
A pulse width modulation (PWM) circuit for an out of audio signal. The circuit is characterized by comprising an energy supply unit, a selection unit and a PWM unit, wherein the energy supply unit comprises a first voltage stabilizer and a second voltage stabilizer which are respectively used for performing voltage stabilization on the system voltage and the bus voltage and alternately outputting the system voltage and the bus voltage to chip detection pins; the selection unit is used for performing frequency division on the system voltage and the bus voltage and outputting a selection voltage after comparison with a reference voltage, the selection voltage respectively controlling the energy supply unit and the PWM unit; and the PWM unit is used for receiving the selection voltage of the selection unit and modulating the pulse width of an output signal on the basis of the comparison of an enable signal. The method in the present invention is simple, has a good effect, and can further achieve modulation of pulse width on the basis of PWM, so that the circuit has higher working efficiency and is more energy-saving and environmentally-friendly in a light-load working state.
Inventors:
YI XINMIN (CN)
JIA LIWEI (CN)
XU HAIFENG (CN)
JIA LIWEI (CN)
XU HAIFENG (CN)
Application Number:
PCT/CN2023/080487
Publication Date:
January 18, 2024
Filing Date:
March 09, 2023
Export Citation:
Assignee:
SG MICRO CORP (CN)
International Classes:
H03K7/08
Foreign References:
| CN115242229A | 2022-10-25 | |||
| US20140103993A1 | 2014-04-17 | |||
| CN112865731A | 2021-05-28 | |||
| US20100079208A1 | 2010-04-01 | |||
| US20180159539A1 | 2018-06-07 |
Attorney, Agent or Firm:
BELJING NEWIPS INTELLECTUALPROPERTYLTD (CN)
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