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:
Nov. 19, 2024
Filed:
Apr. 17, 2020
Nuray Technology Co., Ltd., Suzhou, CN;
Huaping Tang, Suzhou, CN;
Jinsong Pan, Suzhou, CN;
Zhanfeng Qin, Suzhou, CN;
Xiangyu Yin, Suzhou, CN;
Yangwei Zhan, Suzhou, CN;
NuRay Technology Co., Ltd., Jiangsu, CN;
Abstract
A power supply circuit and a field emission electron source are provided. The power supply circuit includes: field effect transistors Scoupled in series via drains and sources in sequence, wherein 1≤i≤n, n≥2, and wherein a source of Sis coupled to a negative electrode of a voltage source, and a drain of Sis used as an output terminal of the power supply circuit to couple to a load; a first group of diodes Dcoupled in series; a first group of resistors R, 2≤j≤n; and a current feedback module configured to adjust an internal resistance of the field effect transistors S, coupled in series in sequence, so as to cause a current passing through the load to be constant; wherein the field effect transistors S, 1≤i≤n, operate in a constant current region.