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:
Jul. 08, 2014
Filed:
Aug. 10, 2012
Shiueshr Jiang, Yuanlin Township, Changhua County, TW;
An-tung Chen, Pingzhen, TW;
Jo-yu Wang, New Taipei, TW;
Jen-hung Chi, Taichung, TW;
Shiueshr Jiang, Yuanlin Township, Changhua County, TW;
An-Tung Chen, Pingzhen, TW;
Jo-Yu Wang, New Taipei, TW;
Jen-Hung Chi, Taichung, TW;
Richtek Technology Corporation, Zhubei, Hsinchu County, TW;
Abstract
An auto-zero amplifier is disclosed, having an amplifying circuit, a switch, and a difference signal generating circuit. The amplifying circuit receives a first input signal for generating a first output signal, and receives a second input signal for generating a second output signal. The switch is coupled between the amplifying circuit and a capacitor. The switch is conducted for charging or discharging the capacitor to a voltage with the first output signal, and the switch is not conducted for keeping the capacitor at the voltage. The difference signal generating circuit is coupled with the amplifying circuit and the capacitor for generating a difference signal of the first output signal and the second output signal, a multiple of the difference signal, a part of the difference signal, and/or a digital output value for the difference signal.