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:
Dec. 16, 2025
Filed:
Feb. 07, 2025
Southwest Jiaotong University, Chengdu, CN;
Wensheng Song, Chengdu, CN;
Haoyang Tan, Chengdu, CN;
Kexin Yang, Chengdu, CN;
Jian Chen, Chengdu, CN;
Tao Tang, Chengdu, CN;
Pengcheng Xu, Chengdu, CN;
Chenwei Ma, Chengdu, CN;
Xinglai Ge, Chengdu, CN;
Southwest Jiaotong University, Chengdu, CN;
Abstract
The present invention discloses a resistor voltage-bearing type on-state voltage drop measurement circuit for junction temperature monitoring and a monitoring method. The measurement circuit includes a high-resistance series high-voltage resistor R, switching diodes Dand D, a low-voltage MOSFET M, an inverter U, a three-state gate U, an RC delay circuit consisting of a resistor Rand a capacitor C, current-limiting resistors Rand R, auxiliary voltage sources VDD and VCC, an operational amplifier U, and an isolation operational amplifier U. and the monitoring method includes: designing an on-state voltage drop sampling circuit based on the high-resistance resistor and selecting parameters according to an actual application scenario; measuring a collector current and an on-state voltage drop model at different junction temperatures under an offline condition, and providing a calculation model for online monitoring; and performing online monitoring on the junction temperature.