Title:
SERIAL PWM SIGNAL DECODING CIRCUIT AND METHOD BASED ON CAPACITANCE CHARGE-DISCHARGE STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2018/170681
Kind Code:
A1
Abstract:
The present invention provides a serial PWM signal decoding circuit based on a capacitance charge-discharge structure, comprising: a time sequence logic generation circuit having an input end for receiving a PWM differential signal, wherein the time sequence logic generation circuit generates a time sequence logic signal; at least two capacitance charge-discharge decoding modules having input ends respectively connected to output ends of the time sequence logic generation circuit, wherein the capacitance charge-discharge decoding modules perform charging and discharging according to the time sequence logic signal. During a decoding process, voltages of charge-discharge capacitances of the capacitance charge-discharge decoding modules before charging and discharging are a common mode voltage VCM, and a voltage of a charge-discharge node after charging and discharging is Vc. Decoding is performed by determining the voltage difference polarity of the VCM and the Vc and identifying a PWM signal. The present invention further provides a serial PWM signal decoding method based on a capacitance charge-discharge structure. The structure disclosed in the present invention is simple and does not need to synchronize code streams, thus avoiding the use of a complicated CDR and an oversampling structure, realizing the decoding of PWM signals under different rates, increasing the efficiency of signal transmission and lowering power consumption.
Inventors:
LI ZHI (CN)
ZHAO JIANZHONG (CN)
ZHOU YUMEI (CN)
XIN WEIHUA (CN)
ZHAO JIANZHONG (CN)
ZHOU YUMEI (CN)
XIN WEIHUA (CN)
Application Number:
PCT/CN2017/077313
Publication Date:
September 27, 2018
Filing Date:
March 20, 2017
Export Citation:
Assignee:
INST OF MICROELECTRONICS CAS (CN)
International Classes:
H03K9/08; G06F13/40; G06F13/42
Domestic Patent References:
| WO2013110015A1 | 2013-07-25 |
Foreign References:
| CN106951385A | 2017-07-14 | |||
| US20140292402A1 | 2014-10-02 | |||
| CN104283569A | 2015-01-14 | |||
| CN203133826U | 2013-08-14 |
Attorney, Agent or Firm:
CHINA SCIENCE PATENT & TRADEMARK AGENT LTD. (CN)
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