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:
Nov. 17, 1987
Filed:
Nov. 12, 1986
Thomas A Somerville, Tucson, AZ (US);
Burr-Brown Corporation, Tucson, AZ (US);
Abstract
In the primary circuit of dc-to-dc converter or a dc-to-ac converter, transistor switching units are associated with two primary windings of a transformer. The transistor switching units each control the flow of current through an associated winding. The first transistor is activated by apparatus that alternatively applies and removes activation signals to the transistor and consequently allows conduction through the transistor and the associated winding. The second transistor receives activation signals from a third primary winding and causes conduction of current through the associated primary transformer winding. The activation signal from the third winding, causing the second transistor to be conductive, is the result of interruption of current in the first primary transformer winding. The activation signals produced by the third primary transformer winding is removed when the first transistor is activated and current is flows in the first primary winding.