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. 03, 2010
Filed:
Jun. 18, 2007
Dennis Sinitsky, Los Gatos, CA (US);
Dennis Sinitsky, Los Gatos, CA (US);
Marvell International Ltd., Hamilton, BM;
Abstract
A start-up circuit for a bandgap reference circuit includes a sampling circuit for sampling current through a diode in one of first and second diode/resistor networks that respectively provide complementary PTAT and CTAT characteristics in the bandgap reference, and a current injection circuit to inject current to a PMOS bus of the bandgap reference if the sampled current is not higher than a pre-designated low value. By virtue of this operation, since current through the diode itself is sampled, the start-up circuit ensures that current through the sampled diode is higher than the pre-designated low value, thereby leading to rapid start-up of the bandgap reference to a stable operating point.