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:
Jun. 18, 2024
Filed:
May. 23, 2023
Focaltech Systems Co., Ltd., Hsinchu, TW;
Fang-Yi Su, Hsinchu, TW;
FOCALTECH SYSTEMS CO., LTD., Hsinchu, TW;
Abstract
An active stylus receiving circuit receives a vector data signal transmitted by an active stylus. The vector data signal carries vector data. The vector data includes in-phase data and quadrature data. The active stylus receiving circuit includes an analog-to-digital converter, an interpolation circuit and a demodulation circuit. The analog-to-digital converter samples and converts the vector data signal into digital signal with a plurality of sampling points. The interpolation circuit performs interpolating operation on the digital signal, so as to increase the number of sampling points representing the digital signal, and generate interpolated digital signal. The demodulation circuit performs demodulating operation on the interpolated digital signal to generate demodulated in-phase data and demodulated quadrature data, thereby obtaining demodulated vector data.