Noise generator circuit for a security system

Details Noise generator circuit for a security system Noise generator circuit for a security system

1975-05-29

1977-12-20

Swann, III, Glen R.

Communications: electrical

Audible indication

Ultrasonic pest control

340213R, 340276, 340420, G08B 300

Patent

active

040645070

ABSTRACT:
A solid state noise generator circuit responds to digital signals indicative of alarm conditions, by initiating frequency modulated digital audio output waveforms distinctly identifying the monitored condition to provide audible recognition of each alarm condition. Each distinct alarm condition results in the application of a different combination of outputs of one multistage counter as preset inputs to a second multistage counter to uniquely frequency modulate the digital square wave input driving the second multistage counter to produce the distinctive frequency modulated digital audio output waveform.

REFERENCES:
patent: 3188392 (1965-06-01), Ferrell
patent: 3510863 (1970-05-01), McBrian
patent: 3582949 (1971-06-01), Forst
patent: 3594788 (1971-07-01), Seelig
patent: 3641570 (1972-02-01), Thompson
patent: 3678509 (1972-07-01), Carlo et al.
patent: 3699569 (1972-10-01), Lee
patent: 3719897 (1973-03-01), Tarr
patent: 3739374 (1973-06-01), Kiowski
patent: 3750131 (1973-07-01), Fletcher et al.
patent: 3803568 (1974-04-01), Higashide
patent: 3818433 (1974-06-01), Okamoto et al.
patent: 3820028 (1974-06-01), Thomas
patent: 3838418 (1974-09-01), Brown

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