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. 22, 1994
Filed:
Apr. 21, 1993
Edward H Honnigford, Russiaville, IN (US);
Delco Electronics Corporation, Kokomo, IN (US);
Abstract
An apparatus comprises a bandgap reference voltage circuit with first and second current legs and circuitry for generating a bandgap reference voltage. A transistor is coupled to the first current leg for selectively providing current to the first leg of the bandgap reference voltage circuit. A control circuit controls the transistor to turn the transistor on when an external voltage supply is initially applied to the apparatus to provide a start up current to the bandgap voltage reference source and senses an output voltage developed by the bandgap reference current source. The control circuit turns off the transistor responsive to the sensed developed voltage when the sensed developed voltage rises above a predetermined threshold.