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:
Aug. 07, 2018
Filed:
Jan. 11, 2018
University of Electronic Science and Technology of China, Chengdu, CN;
Zekun Zhou, Chengdu, CN;
Xiang Li, Chengdu, CN;
Yandong Yuan, Chengdu, CN;
Yue Shi, Chengdu, CN;
Zhuo Wang, Chengdu, CN;
Bo Zhang, Chengdu, CN;
UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA, Chengdu, CN;
Abstract
A sub-threshold low-power and resistor-less reference circuit which is related to the field of reference circuit technology of analog circuit includes a negative-temperature-coefficient voltage generating circuit, a positive-temperature-coefficient voltage generating circuit and a current balancing circuit. The negative-temperature-coefficient voltage generating circuit generates a negative-temperature-coefficient voltage Vbased on the negative-temperature voltage characteristic of base-emitter PN junction of the bipolar tsansistor. On the other hand, the positive-temperature-coefficient voltage generating circuit generates a positive-temperature-coefficient voltage Vbased on the positive-temperature voltage characteristic of the NMOS transistor operating in a sub-threshold region. The current balancing circuit is configured to eliminate the error current caused due to the difference of the current mirror when the two voltages with different temperature characteristics are superposed to output a reference voltage.