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. 08, 1986
Filed:
Oct. 10, 1984
Applicant:
Inventor:
Dennis L Welty, Mesa, AZ (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04M / ;
U.S. Cl.
CPC ...
179 / ; 307362 ; 179 / ;
Abstract
A sense circuit which senses when the magnitude of a full wave rectified current exceeds a predetermined threshold value comprises current mirrors for diverting a very small portion of the current to an output wherein this current is filtered to produce a direct current (dc) voltage. The magnitude of the dc voltage varies directly with the magnitude of the rectified current. The dc voltage is compared with a reference voltage to produce an output signal when the magnitude of the reference voltage is exceeded.
Welty, Dennis. (1986). Ring sense telephone tone ringer circuit (U.S. Patent No. 4599494). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4599494
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile