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:
Mar. 22, 2016
Filed:
Mar. 10, 2015
Applicant:
Texas Instruments Incorporated, Dallas, TX (US);
Inventor:
Rajendrakumar Joish, Karnataka, IN;
Assignee:
TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03M 1/44 (2006.01); H03M 1/14 (2006.01); H03M 1/66 (2006.01); H03M 1/12 (2006.01);
U.S. Cl.
CPC ...
H03M 1/442 (2013.01); H03M 1/12 (2013.01); H03M 1/145 (2013.01); H03M 1/66 (2013.01);
Abstract
A circuit includes an amplifier circuit that receives a residue voltage from an output capacitor connected to an output of a digital to analog converter (DAC). The DAC is employed in a pipeline stage of an analog to digital converter (ADC). The amplifier circuit provides a scaled output voltage based on the residue voltage. A sample circuit samples the scaled output voltage during a first portion of a hold phase of the DAC. A discharge circuit supplies the sampled scaled output voltage to the output of the DAC during a second portion of the hold phase of the DAC to mitigate settling time of the DAC.