Car alarm having a soft chirp arming signal

Details Car alarm having a soft chirp arming signal Car alarm having a soft chirp arming signal

1995-03-06

1996-11-05

Hofsass, Jeffery

Communications: electrical

Land vehicle alarms or indicators

340426, 340692, 307 102, B60R 2500

Patent

active

055721850

ABSTRACT:
An electronic anti-theft system for vehicles having a common signal generator and speaker for both the alarm siren and the arming chirp, in which the volume of the arming or disarming chirp can be set to a desired level. A control circuit is detailed which allows the volume of the arming chirp to be attenuated.

REFERENCES:
patent: 4885572 (1989-12-01), Iwata et al.
patent: 4996515 (1991-02-01), Schaffer et al.
patent: 5382941 (1995-01-01), Arzoumanian et al.
Digital Volume Control, "Elector Electronics", Dec. 1990 p. 40.

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