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:
Feb. 25, 2020
Filed:
Mar. 08, 2019
Upi Semiconductor Corp., Zhubei, Hsinchu County, TW;
UPI SEMICONDUCTOR CORP, Zhubei, TW;
Abstract
A current mirror calibration circuit, coupled to an error amplifier of a pulse-width modulation controller, includes a first voltage generation unit, a second voltage generation unit, a calibration unit and a current mirror circuit. During an initial period, the first voltage generation unit and second voltage generation unit provide a first default voltage and a second default voltage respectively. The current mirror circuit includes a first current unit and a second current unit. The first current unit receives an original current. The second current unit generates a mirror current having a proportional relationship with original current. The first current unit has a first node coupled to the first voltage generation unit and a second node coupled to a third default voltage. The second current unit has a third node coupled to the second voltage generation unit and calibration unit and a fourth node coupled to calibration unit and an output terminal of error amplifier.