Title:
NEAR FIELD COMMUNICATION TRANSMISSION CIRCUIT, RELATED CHIP, AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/252403
Kind Code:
A1
Abstract:
The present application discloses a near field communication transmission circuit, a related chip, and an electronic device, comprising a waveform modulation unit and an output switch unit. The waveform modulation unit generates a first pulse width modulation signal according to the sine wave and the carrier wave, and generates a first square wave signal according to the sine wave. The output switch unit comprises a first switch and a second switch. The first switch is coupled to a first voltage and is configured to correspondingly output the first voltage on the basis of the control of the first pulse width modulation signal. The second switch is coupled to a second voltage and is configured to correspondingly output the second voltage on the basis of the control of the first square wave signal. In the first half cycle of the sine wave, the waveform modulation unit modulates the sine wave and the carrier wave to generate the first pulse width modulation signal, and the first square wave signal is maintained at a low potential. In the second half cycle of the sine wave, the first pulse width modulation signal is maintained at a low potential, and the first square wave signal is maintained at a high potential.
Inventors:
YUAN GUANG KAI (CN)
Application Number:
PCT/CN2021/113237
Publication Date:
December 08, 2022
Filing Date:
August 18, 2021
Export Citation:
Assignee:
SHENZHEN GOODIX TECH CO LTD (CN)
International Classes:
H04B5/00
Foreign References:
| CN113037337A | 2021-06-25 | |||
| CN103607104A | 2014-02-26 | |||
| CN107026663A | 2017-08-08 | |||
| CN103297095A | 2013-09-11 | |||
| US20150011161A1 | 2015-01-08 | |||
| US5736825A | 1998-04-07 |
Attorney, Agent or Firm:
TIANTAI LAW FIRM (CN)
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