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:
Feb. 21, 2023
Filed:
Oct. 20, 2021
Realtek Semiconductor Corp., Hsinchu, TW;
Jon-Jin Chen, Hsinchu, TW;
Chia-Jun Chang, Hsinchu, TW;
Ka-Un Chan, Hsinchu, TW;
Yi-Ching Wu, Hsinchu, TW;
REALTEK SEMICONDUCTOR CORP., Hsinchu, TW;
Abstract
A communication chip includes an input port, a gain circuit, a correction circuit having a phase-locked loop (PLL) circuit and a return terminal, a post-processing circuit, and a switching circuit. The gain circuit includes an input terminal and a quadrature modulation circuit that operates according to a reference clock. The gain circuit gains a signal from the input terminal according to a bias voltage and outputs a gained signal. The PLL circuit generates a correction signal through synchronization according to the reference clock. The post-processing circuit obtains an input signal strength according to a correction table and a signal from a receiving terminal of the post-processing circuit. The switching circuit couples the correction signal to the input terminal and the gained signal to the return terminal in test mode and couples the input port to the input terminal and the gained signal to the receiving terminal in an operating mode.