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:
Feb. 24, 1987
Filed:
Sep. 13, 1985
Giuseppe Baroni, Milan, IT;
Gianpaolo Montorfano, Milan, IT;
Honeywell Information Systems Italia, Milan, IT;
Abstract
A multiple output switching power supply wherein the voltage at a main output which couples to a main secondary winding of a transformer is regulated by pulse width modulation of the current flowing in the primary winding of the transformer and wherein the voltage at an auxiliary output which couples to an auxiliary secondary winding of the transformer is regulated by pulse width modulation of the current flowing in the auxiliary winding. The pulse width modulation is performed in synchronism with a preestablished turn-on delay of the control switches which control current pulses in the primary winding as to the turn-on of the switches which control current pulses in the auxiliary winding. Besides avoiding the need for a filter between the auxiliary winding and the related control switch, this form of synchronization reduces switching power losses, current spikes and induced radio frequency emission.