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, 2007
Filed:
Dec. 01, 2006
Ke-horng Chen, Taipei County, TW;
Li-ren Huang, Taipei County, TW;
Hong-wei Huang, Taichung County, TW;
Sy-yen Kuo, Taipei, TW;
Ke-Horng Chen, Taipei County, TW;
Li-Ren Huang, Taipei County, TW;
Hong-Wei Huang, Taichung County, TW;
Sy-Yen Kuo, Taipei, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A DC-DC converter includes an error amplifier that includes an operational transconductance amplifier (OTA), a compensation circuit, and a fast transient controller. The OTA includes a compensation resistor, a compensation capacitor of C, and a Miller circuit. The equalization capacitance generated by the compensation capacitor and the Miller circuit is (1+k) C. The Miller circuit includes three transistors operated in the triode region. The ratio of the current through the transistors is 1:mk:(1−m)k. The current through the compensation capacitor in a second mode is (1+mk) times that in a first mode. The fast transient controller switches the Miller circuit between the first and second modes according to a feedback voltage dependent on the output voltage of the DC-DC converter.