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:
Mar. 11, 1997
Filed:
Jan. 10, 1995
Suresh C Gupta, Los Alamitos, CA (US);
Cambridge Continuous Power, Irvine, CA (US);
Abstract
A power supply typology in which the pulse width modulated invertor switches serve two functions; conversion of the a.c. input to a d.c. rail voltage in addition to inversion of the d.c. rail voltage to a regulated a.c. output. An a.c. input ground terminal is connected to a node between two of the invertor switches and this node is also connected to the a.c. output to provide a common ground between the a.c. input and the a.c. output. A silicon control rectifier switch and one of the invertor switches connected to the ground node connect the back-up battery to the a.c. source during positive half cycles of the a.c. input in order to maintain a charge on the back-up battery.