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. 07, 2023
Filed:
Sep. 01, 2021
Texas Instruments Incorporated, Dallas, TX (US);
Rajat Chauhan, Mahadevapura, IN;
Sandeep Shylaja Krishnan, Kerala, IN;
Joseph Alan Sankman, Dallas, TX (US);
TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US);
Abstract
In an example method of trimming a voltage reference circuit, the method includes: setting the circuit to a first temperature; trimming a first resistor (R) of a differential amplifier stage of the circuit; and trimming a first resistor (R) of a scaling amplifier stage of the circuit. The trimming equalizes current flow through the differential amplifier stage and the scaling amplifier stage. The method includes: trimming a second resistor (R) of the scaling amplifier stage to set an output voltage of the circuit to a target voltage at the first temperature; setting the circuit to a second temperature; and trimming a second resistor (R) of the differential amplifier stage, a third resistor (R) of the scaling amplifier stage, and a fourth resistor (R) of the scaling amplifier stage to set the output voltage of the circuit to the target voltage at the second temperature.