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. 25, 1997
Filed:
Feb. 14, 1994
Allan A Nostwick, Huntington, IN (US);
Bryce L Hesterman, Fort Wayne, IN (US);
MagneTeck, Inc., Los Angeles, CA (US);
Abstract
A compensation circuit in a boost-type preregulator of the type having a power factor control circuit operating in a critical conduction mode by providing a triangular modulation of current according to a sine wave envelope, the compensation circuit in the form of a charge pump circuit acting as a frequency-to-voltage converter and including a capacitor, diode and resistor network providing AC coupled current pulses from the output to the input of the power factor control circuit to reduce crossover distortion during the zero-crossing of input current drawn from a sine wave power source. A capacitor at the current envelope input of the power factor control circuit operates to time-average integrate the current pulses to provide a load-current-dependent bias or compensation signal to the power factor correction circuit regulating the critical conduction mode of operation. In another embodiment, the compensation circuit includes an amplifier connected to a current feedback resistor and to a fixed reference to provide the compensation signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile