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. 25, 2014
Filed:
Sep. 15, 2011
Mahadevan Venkiteswaran S., Karnataka, IN;
Subramanian J. Narayan, Karnataka, IN;
Vadim Ivanov, Tucson, AZ (US);
Mahadevan Venkiteswaran S., Karnataka, IN;
Subramanian J. Narayan, Karnataka, IN;
Vadim Ivanov, Tucson, AZ (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
Offset calibration technique to improve performance of band gap voltage reference. An example of a bandgap reference source includes an output resistor, a first and second transistors and a differential amplifier. A positive-input calibration phase switch is in communication with a positive amplifier input, a emitter of the first and second transistor and a negative-input calibration phase switch in communication with the negative amplifier input, the emitter of the first and second transistor. A positive-output calibration phase switch is in communication with the positive amplifier output, the first and second terminal of the output resistor and a negative-output calibration phase switch is in communication with the negative amplifier output, the first and second terminal of the output resistor. An adjustable resistance is in communication with the emitter of the first transistor, the emitter of the second transistor, and the second terminal of the output resistor.