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. 14, 2017
Filed:
Dec. 27, 2013
University of Electronic Science and Technology of China, Sichuan, CN;
Sichuan Sunfor Light Co., Ltd., Sichuan, CN;
Ning Ning, Sichuan, CN;
Yongming Jia, Sichuan, CN;
Wenbin Chen, Sichuan, CN;
Chunyi Feng, Sichuan, CN;
Dongming Li, Sichuan, CN;
Mian Yang, Sichuan, CN;
Zhengyong Feng, Sichuan, CN;
Wentao Long, Sichuan, CN;
SICHUAN SUNFOR LIGHT CO., LTD, Sichuan, CN;
Abstract
The present disclosure discloses a multipath current source switching device, including a switching control unit, N current paths, and N loads. Each current path is formed by a constant current source circuit and a switching circuit. One terminal of a first load is coupled to a load power supply, and the other terminal of the first load is coupled to an output terminal of a constant current source circuit of a first current path and one terminal of a second load; one terminal of an iload is coupled to the other terminal of an (i−1)load and an output terminal of a constant current source circuit of an icurrent path; and the switching control unit controls an output current of a corresponding constant current source circuit through a corresponding switching circuit. When the circuits are switched, an output voltage of a switching circuit of a current path to be switched off is decreased to zero according to a preset voltage variation quantity, and an output voltage of a switching circuit of a current path to be switched on is increased to a highest operating voltage according to the preset voltage variation quantity, such that a current on a load does not exceed a preset current and is not zero during switching. N is an integer not less than 2, and i is equal to 2, 3, 4, . . . , N.