Electronic timepiece battery monitoring circuit

Details Electronic timepiece battery monitoring circuit Electronic timepiece battery monitoring circuit

1978-04-26

1980-11-04

Miska, Vit W.

Horology: time measuring systems or devices

Chronological

With power monitor

368203, 340636, 340641, G04C 2300, G04B 100, G08B 2100

Patent

active

042323835

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.

REFERENCES:
patent: 3949545 (1976-04-01), Chihara
patent: 3979657 (1976-09-01), Torksie
patent: 4041691 (1977-08-01), Chihara et al.
patent: 4043110 (1977-08-01), Chihara
patent: 4043112 (1977-08-01), Tanaka
patent: 4126874 (1978-11-01), Suzuki et al.
patent: 4126889 (1978-11-01), Ibamoro et al.

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