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:
Jan. 10, 2012
Filed:
Feb. 10, 2009
Scott L. Smith, Madison, AL (US);
Steven M. Robinson, Madison, AL (US);
Scott L. Smith, Madison, AL (US);
Steven M. Robinson, Madison, AL (US);
ADTRAN, Inc., Huntsville, AL (US);
Abstract
A power supply includes a rectifier circuit having a rectifier mode and a voltage doubler mode. An AC switch is coupled to the rectifier circuit and switches the rectifier circuit into the rectifier mode when a higher AC line voltage is supplied and a voltage doubler mode when a lower AC line voltage is supplied. A control circuit is connected to the AC switch and detects the higher or lower AC line voltages and is operable for latching the rectifier circuit in the rectifier mode when the higher AC line voltage is detected and in the voltage doubler mode when the lower AC line voltage is detected. The latch circuit maintains a latched configuration in either the rectifier or voltage doubler mode during voltage transients and in the rectifier mode during start-up transients.