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:
Aug. 16, 1983
Filed:
Dec. 21, 1981
Applicant:
Inventor:
Gerald M Rinaldi, Mundelein, IL (US);
Assignee:
GTE Automatic Electric Labs Inc., Northlake, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
328112 ; 307234 ;
Abstract
A duty cycle monitor circuit which detects variations in the duty cycle of a monitored pulse by comparing its duty cycle with the pulse width of an external reference signal. A detection circuit detects the duty cycle variation of the monitored pulse after being periodically reset by the external reference signal. A storage circuit is clocked by the reference signal and operates to store the output signals of the detection circuit. Upon detection of a duty cycle failure the monitor can be cleared by external control or detection of a monitored pulse having a valid duty cycle.