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:
Nov. 05, 2013
Filed:
Jan. 28, 2010
Hung-chieh Tsai, Tainan County, TW;
Yu-hsin Lin, Taipei, TW;
Chi-lun Lo, Taoyuan County, TW;
Jong-woei Chen, Hsinchu, TW;
Hung-Chieh Tsai, Tainan County, TW;
Yu-Hsin Lin, Taipei, TW;
Chi-Lun Lo, Taoyuan County, TW;
Jong-Woei Chen, Hsinchu, TW;
Mediatek Inc., Science-Based Industrial Park, Hsin-Chu, TW;
Abstract
An operational circuit includes: a gain control circuit arranged to provide a gain value upon an input signal according to a set of control signals, wherein the gain control circuit includes a first resistor-based network and a second resistor-based network; an operational amplifier coupled to the gain control circuit and arranged to generate an output signal according to the input signal and the gain value; and a first capacitor coupled to the operational amplifier and arranged to hold the output signal between a first input terminal and a first output terminal of the operational amplifier, wherein when the operational circuit is operating, a first terminal of the first capacitor is consistently coupled to the first input terminal of the operational amplifier, and a second terminal of the first capacitor is consistently coupled to the first output terminal of the operational amplifier.