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:
Sep. 17, 2013
Filed:
Feb. 09, 2010
Liang-wei Huang, Taipei, TW;
Ting-fa Yu, Yunlin County, TW;
Ta-chin Tseng, Taipei County, TW;
Chih-chi Wang, Taichung County, TW;
Liang-Wei Huang, Taipei, TW;
Ting-Fa Yu, Yunlin County, TW;
Ta-Chin Tseng, Taipei County, TW;
Chih-Chi Wang, Taichung County, TW;
Realtek Semiconductor Corp., Hsinchu, TW;
Abstract
A communication apparatus with echo cancellation includes a transmitter, a receiver, a digital echo cancellation circuit, a parameter control circuit, and an analog echo cancellation circuit. The digital echo cancellation circuit determines an echo estimation component according to a digital output signal, and performs a digital echo cancellation on a digital input signal according to the echo estimation component. The parameter control circuit generates a control signal according to the echo estimation component. The analog echo cancellation circuit includes a first echo cancellation resistor and a second echo cancellation resistor, wherein the resistances of the first echo cancellation resistor and the second echo cancellation resistor are adjusted according to the control signal.