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:
Jun. 15, 2021
Filed:
Jun. 02, 2020
Applicant:
Texas Instruments Incorporated, Dallas, TX (US);
Inventor:
Paul Stulik, Tucson, AZ (US);
Assignee:
TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
H03M 1/12 (2006.01); H03M 1/46 (2006.01); H03M 1/80 (2006.01);
U.S. Cl.
CPC ...
H03M 1/466 (2013.01); H03M 1/1245 (2013.01); H03M 1/804 (2013.01);
Abstract
Circuits and methods for minimizing charge losses due to negative transient voltage at summing terminals of an analog to digital converter (ADC) are disclosed. The ADC is coupled to a multi-bit digital to analog converter (DAC) at the summing terminals. The ADC and the DAC include PMOS and NMOS transistors whose timing are controlled to reduce charge losses. The PMOS transistors are turned ON before the NMOS transistors. Also, the PMOS transistor of the ADC is turned ON at a slower rate than the PMOS transistors of the DAC.