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:
Dec. 04, 1990
Filed:
Apr. 23, 1990
Janet L Wise, Sherman, TX (US);
Steven F Marum, Sherman, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
The specification discloses circuitry for compensating integrated circuits for negative internal ground voltage glitches. An output transistor (30) receives input signals at its base and has an emitter connected through a Schottky diode (32) to internal circuit ground. The compensation circuit includes a transistor (42) coupled to the base of transistor (30) and having an emitter also coupled to internal circuit ground. A capacitor (44) is connected between the base of transistor (42) and a source of bias voltage. Transistor (42) is rendered conductive by the occurrence of negative voltage glitches on the circuit ground, thus reducing voltage on the base of transistor (30) to prevent premature conduction by transistor (30).