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. 31, 2001
Filed:
Aug. 28, 1998
Michiel de Wit, Dallas, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
An analog-to-digital converter has a binary weighted capacitor array with one plate of each capacitor connected at an input to a comparator and successive approximation logic circuitry provided for selectively connecting the capacitors to high reference, low reference or analog input signal voltage to develop a digital output in a successive charge redistribution conversion process. An on-board test data generator provides a test input voltage signal for a test mode. The other plate of each capacitor is selectively connected to the high or low reference voltage to charge the capacitors separately according to a prestored or externally supplied test pattern sequence. The digital output obtained from applying the usual sample, hold and charge redistribution process to the internally supplied test signal is compared to an expected digital output for an input signal corresponding to the predetermined test pattern sequence.