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. 12, 2022
Filed:
Dec. 30, 2020
Texas Instruments Incorporated, Dallas, TX (US);
Faruk Jose Nome Silva, Sunnyvale, CA;
Amanda Tomlinson, Santa Clara, CA (US);
Aldrin Paynter, Santa Clara, CA (US);
TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US);
Abstract
A trimmable and switchable current mirror can be used in a bandgap voltage reference to calibrate the voltage reference without requiring access to measurement of the quiescent current Iof the voltage reference. Trimmable transistors within the current mirror are alternately selectable as the diode-connected transistor via a mirror switch signal. A bandgap voltage difference is computed for two bandgap voltage values measured for alternate switched configurations of the current mirror. A set of such differences is computed and stored for different trim configurations of the mirror transistors, and the trim configuration corresponding to the lowest absolute value bandgap voltage difference can be selected as the optimal trim configuration. Following mirror transistor trim adjustment, a bandgap resistor trim can be adjusted to further calibrate the bandgap voltage reference.