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:
Apr. 12, 2005
Filed:
Jun. 25, 2003
Igor Elkin, Malden, MA (US);
Ilya Bystryak, Salem, MA (US);
Jack Schuss, Newton, MA (US);
Tung M. Huynh, North Andover, MA (US);
Vadim Lubomirsky, Rochester, NY (US);
Igor Elkin, Malden, MA (US);
Ilya Bystryak, Salem, MA (US);
Jack Schuss, Newton, MA (US);
Tung M. Huynh, North Andover, MA (US);
Vadim Lubomirsky, Rochester, NY (US);
MKS Instruments, Inc., Andover, MA (US);
Abstract
A power holdup circuit including a monitoring circuit and a power holdup circuit. The monitoring circuit includes an average voltage comparator and an absolute voltage comparator which cooperate to detect a voltage drop in the voltage supplied by the power supply. The monitoring circuit also includes a timer to determine the time period of the voltage dropout. If a predetermined voltage dropout event occurs, the monitoring circuit generates a control signal to a switching component which activates a holdup power source. The holdup power source includes an energy storage device that stores energy to maintain the supply voltage during dropout periods.