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:
Jun. 03, 2003
Filed:
Oct. 11, 2001
Applicant:
Inventor:
Barry Caldwell, Hesston, KS (US);
Assignee:
LSI Logic Corporation, Milpitas, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03L 7/00 ; H03K 3/02 ;
U.S. Cl.
CPC ...
H03L 7/00 ; H03K 3/02 ;
Abstract
A power ground short circuit with adjustable activation delay and activation time period eliminates latent voltages in the power down/ off discharging circuitry. The circuit uses an internal back up power storage device to supply power on power down. A comparator determines when the power down condition occurs. Two timers are used to generate an activation signal for a charge pump. The charge pump is responsible for turning on a pair of transistors which bring the power bus voltage down to a zero level. A slew rate detector enables the comparator.