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:
Apr. 10, 1990
Filed:
Jul. 27, 1988
Applicant:
Inventor:
Robert W Peitz, Jr, Fayetteville, NY (US);
Assignee:
Carrier Corporation, Syracuse, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ; H03K / ; H03K / ;
U.S. Cl.
CPC ...
307269 ; 307361 ; 307364 ; 307241 ; 307242 ; 307243 ; 328 28 ; 328104 ; 328116 ; 328179 ; 328154 ; 328 63 ; 328 72 ;
Abstract
An AC input conditioning circuit comprises a latch circuit, one or more latch conditioning channels, and a latch synchronizing circuit that is coupled to an AC source and has an output supplying a latch enable pulse to the latch enable terminal of the latch circuit only when the AC power signal exceeds predetermined latching threshold during alternate half cycles. The conditioning channel comprises an input coupled to a device whose on or off sense is to be detected, and an output coupled to a corresponding channel of the latch. Each conditioning channel can be comprised of a rectifier diode, followed by a zener diode and a driver amplifier.