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:
Oct. 06, 2026
Filed:
Mar. 19, 2025
Richtek Technology Corporation, Hsinchu, TW;
Ming-Hsien Shih, Hsinchu, TW;
Tai-Wei Chang, Hsinchu, TW;
RICHTEK TECHNOLOGY CORPORATION, Hsinchu, TW;
Abstract
A bandgap reference circuit includes: first and second bipolar junction transistors (BJT) biased at first and second current densities respectively, such that the base-emitter voltages of the first and second BJTs have a base-emitter voltage difference. The first BJT is configured to determine a negative temperature coefficient (CTAT) signal. A differential sensing resistor is series-coupled between ground potential and the second BJT to form a sub-branch, with the differential sensing resistor located closer to the ground potential side. A feedback circuit is configured to control the sub-branch and the first BJT to have the same voltage drop, such that the voltage drop across the differential sensing resistor includes the base-emitter voltage difference, thereby determining a positive temperature coefficient (PTAT) signal. The feedback circuit further generates a reference voltage with a zero temperature coefficient based on the PTAT signal and the CTAT signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile