The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 31, 2023
Filed:
Sep. 30, 2020
Shenzhen Goodix Technology Co., Ltd., Shenzhen, CN;
SHENZHEN GOODIX TECHNOLOGY CO., LTD., Shenzhen, CN;
Abstract
Some embodiments of the present disclosure provide a signal processing system, a chip and an active stylus. The signal processing system includes: a pre-amplifier circuit, configured to pre-amplify a received DSSS signal and output a pre-amplified DSSS signal; a low-pass filter circuit, configured to filter the pre-amplified DSSS signal and output a filtered DSSS signal; an analog-to-digital converter circuit, configured to sample the filtered DSSS signal and output a sampled DSSS signal; a noise detecting and filtering-out circuit, configured to filter out a noise in the sampled DSSS signal and output a noise-filtered DSSS signal; and a digital demodulation circuit, configured to demodulate the noise-filtered DSSS signal to output a demodulated signal. The signal processing system can have strong anti-interference ability and high sensitivity through the noise detecting and filtering-out circuit and automatically controlling a gain of the pre-amplifier circuit.