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:
May. 07, 1991
Filed:
Oct. 11, 1989
Thomas S Latos, Huntley, IL (US);
Sundstrand Corporation, Rockford, IL (US);
Abstract
A transistor circuit (50) in accordance with the invention includes a bipolar transistor (52) having a base and an emitter and collector coupled to a source of variable DC potential (54); an electrical load (22) coupled between the source of variable DC potential and one of the emitter and collector; a limit current generator (60), responsive to the variable DC potential, for producing a signal specifying a current limit for operating the transistor as a function of the sensed potential; a current sensor (64), coupled to the transistor circuit, for sensing current flow to the load from the source of DC potential; and a comparator (62), responsive to the current limit and the current flow to the load, for providing on an output a turnoff signal to the base of the transistor when the current flow exceeds the current limit.