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. 16, 2002
Filed:
Sep. 08, 1999
Paul C. Yu, Coppell, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A method for practice in a pipelined analog to digital converter. The method converts an analog signal to a sequence of digital words, while converting capacitor mismatch in the stages of the ADC into white noise. In the method, for each of one or more of the pipelined stages, first, the plurality of capacitors therein is coupled at a sample time between the stage input port and ground. Second, during an amplifying period following the sample time, one or more of the plurality of capacitors are coupled between a reference voltage and the input port of the amplifier, while the remainder of the plurality of capacitors are coupled between the input port of the amplifier and the output port of the amplifier, such that different ones of the plurality of capacitors are selected, according to a predetermined procedure uncorrelated with the analog signal, for coupling between the stage input port and ground.