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:
Nov. 04, 1980
Filed:
Apr. 26, 1978
Hiroyuki Chihara, Suwa, JP;
Kabushiki Kaisha Suwa Seikosha, Tokyo, JP;
Abstract
A battery monitoring circuit for an electronic wristwatch that avoids an inadvertent indication of battery failure when a sudden, but temporary, load is placed upon the battery is provided. The invention is characterized by a monitoring circuit that produces an indication signal of impending failure of the battery in response to a detection signal being applied thereto. The detection signal is produced by a battery detection circuit when the voltage of the battery falls below a predetermined level. An inhibit circuit is coupled intermediate the voltage detection circuit and the monitoring circuit and detects when a temporary load is placed upon the battery and, in response thereto, inhibits the detection signal from being applied to the monitoring circuit to thereby prevent an indication signal, representative of imminent battery failure, from being produced as a result of an additional load being temporarily placed upon the battery.