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:
Jul. 14, 1992
Filed:
Mar. 12, 1991
Stephen J Glica, Somerset, NJ (US);
Harris Corporation, Melbourne, FL (US);
Abstract
A power-on reset circuit produces a momentary signal when the operating potential increases above a first threshold and when the operating potential decreases below a second threshold level. In a preferred embodiment, the circuit includes first and second IGFETs of first conductivity having their conduction paths connected in series between a positive operating terminal and a first node and third and fourth IGFETs of second conductivity having their conduction paths connected in series between the first node and a negative operating terminal. An inverter is connected at its input to the first node. The output of the inverter is coupled via a first feedback network to the intersection of the conduction paths of the third and fourth IGFETs to control the voltage level at which the third IGFET conducts when power ramps up. The output of the inverter is also coupled via a second feedback network to the intersection of the conduction paths of the first and second IGFETs to control the voltage level at which the second IGFET conducts when power ramps down.