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:
Aug. 12, 2008
Filed:
Nov. 09, 2006
Shiau-wen Kao, Hsinchu, TW;
Shiau-Wen Kao, Hsinchu, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A DC offset cancellation block is provided for canceling a DC offset in a signal path. The signal path may include an input and an output. The DC offset cancellation block may include an active integrator coupled between the input and the output to provide a negative feedback to the signal path. The active integrator may include an operational-amplifier (op-amp), a capacitive component with a capacitance C, and a resistive component with a resistance R, and the capacitive component may be coupled to the op-amp via a closed feedback loop. The DC offset cancellation block may also include a first amplifier with a gain of Gcoupled with the capacitive component in the closed feedback loop such that a RC time constant of the active integrator is changed from RC to RCG.