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:
Jul. 20, 2004
Filed:
Jul. 10, 2003
Applicant:
Inventors:
Ta-yung Yang, Milpitas, CA (US);
Hsuan-I Pan, Taipei, TW;
Chern-Lin Chen, Taipei, TW;
Jenn-yu G. Lin, Taipei, TW;
Assignee:
System General Corp., Taipei Hsien, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/56 ;
U.S. Cl.
CPC ...
G05F 1/56 ;
Abstract
A method an apparatus to dynamically modify the internal compensation of a low drop-out (LDO) linear voltage regulator is presented. The process involves creating an additional equivalent series resistance (ESR) from an internal circuit. The additional ESR of the internal circuit is sufficient to ensure DC output stability. This allows the ESR of the output capacitance to be reduced to zero if desired, for improved transient response. The zero induced by the ESR of the internal circuit is frequency compensated, so that it tracks the position of the output pole as the load varies.