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. 28, 2011
Filed:
Dec. 21, 2009
Chih-haur Huang, Tainan County, TW;
Chih-Haur Huang, Tainan County, TW;
Himax Media Solutions, Inc., Tainan County, TW;
Abstract
A sample hold circuit and a method for eliminating the offset voltage of the analog signal are provided. The sample hold circuit includes a sample unit, a plurality of capacitors, a control unit and a hold unit. When the sample hold circuit is in a first state, the sample unit samples an analog signal. When the sample hold circuit is in a second state, the capacitors eliminate a DC offset voltage of the analog signal sampled by the sample unit, and the hold unit outputs an AC signal of the analog signal sampled by the sample unit. The control unit adjusts a number of the capacitances coupled to a common voltage according to a magnitude of the DC offset voltage, thus to determine the capacitance for eliminating the DC offset voltage.