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. 01, 2009
Filed:
Sep. 21, 2007
Applicants:
Tawen Mei, Mountain View, CA (US);
Chunping Song, Santa Clara, CA (US);
Inventors:
Tawen Mei, Mountain View, CA (US);
Chunping Song, Santa Clara, CA (US);
Assignee:
National Semiconductor Corporation, Santa Clara, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/40 (2006.01); G05F 1/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
A boost hysteretic DC-DC converter is provided. The converter includes a power switch, a hysteretic comparator, an inductor, an output capacitor, and a resistive device. The resistive device is coupled to the bottom of the output capacitor, so that the output voltage is equal to the sum of the capacitor voltage and the voltage across the resistive device. The resistance of the resistance device is sufficiently large that the output voltage ripple is in phase with the inductor current.