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. 13, 2002
Filed:
Jul. 25, 2001
Frank Ohnhaeuser, Bavaria, DE;
Miroslav Oljaca, Tucson, AZ (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
An analog-to-digital converter receiving an analog input signal (V ) including an offset component, and includes a switched capacitor input circuit ( ) configured to sample the analog input signal (V ) to produce and store a signal representative of the sampled input signal between a first conductor ( ) and a second conductor ( ). A conversion circuit ( ) is coupled to the first conductor ( ) and the switched capacitor input circuit ( ) to produce a digital output signal (DATA OUT). An offset correction circuit ( ) includes an output coupled to the second conductor ( ) and an input receiving a digital offset correction signal (DATA IN), the offset correction circuit ( ) including a switched capacitor correction circuit ( A) operative in response to the offset correction control signal (DATA IN) to transfer charge to/from the second conductor ( ). The conversion circuit ( ) operates in response to adjustment by the offset correction circuit ( ) of a signal conducted by the second conductor ( ) to produce the digital output signal (DATA OUT) compensated for the offset component.