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. 26, 1996
Filed:
Sep. 06, 1994
Jeff W Hall, Phoenix, AZ (US);
Steven M Barrow, Phoenix, AZ (US);
Jade H Alberkrack, Tempe, AZ (US);
Eric W Tisinger, Chandler, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
An integrated power factor control circuit (12) for keeping an average AC line current sinusoidal and in phase with the line voltage. The integrated power factor control circuit (12) provides a boosted DC voltage greater than the amplitude of the line voltage. A transconductance amplifier (16) provides a boosted source and sink current when an output voltage is significantly out of regulation. The boosted source and sink current of the transconductance amplifier (16) increases the speed in which the voltage control loop can react to an output voltage change and reduces the time needed to generate the regulated voltage under startup. A comparator (17) provides a boost current at start up and senses a no-load condition during normal operation. The comparator (17) senses the no-load condition and stops switching to eliminate further output charging before an out of range condition occurs.