Battery discriminator circuit for smoke detector

Details Battery discriminator circuit for smoke detector Battery discriminator circuit for smoke detector

G - Physics

01

R

340/155, 358/21,

G01R 19/00 (2006.01) G01R 31/28 (2006.01) G01R 31/36 (2006.01) G08B 17/103 (2006.01) G08B 23/00 (2006.01) G08B 29/18 (2006.01)

Patent

CA 1094158

Abstract of the Disclosure A battery powered smoke detector includes a battery powered dis- criminator circuit which periodically senses the chemistry of the battery represented by its volt-ampere output and internal impedance. An external impedance comparable to the alarm circuit load on the battery is connected in parallel with the battery such as to trigger an alarm when the battery energy delivered through the impedance is inadequate to drive the alarm.

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