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:
Dec. 09, 2003
Filed:
Jun. 25, 2002
Applicant:
Inventors:
Tom Currelly, North Vancouver, CA;
Randy Law, Surrey, CA;
Assignee:
Alcatel Canada Inc., Kanata, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/40 ;
U.S. Cl.
CPC ...
G05F 1/40 ;
Abstract
A quick-starting low-voltage DC power supply circuit has a switch mode DC to DC converter connected to a DC supply source. A low-dropout-regulator (LDO) connected in parallel with the switch-mode DC to DC converter, and a diode is connected in series with the output of the low-dropout-regulator connecting the output of the low-dropout-regulator to the output of the switch-mode DC to DC converter. The arrangement is such that the start-up output voltage of the circuit is the output voltage of the low-dropout-regulator and the long-term output voltage of the circuit is supplied by the switch-mode DC to DC converter output.