I.C. Alarm signal generator

Details I.C. Alarm signal generator I.C. Alarm signal generator

1981-09-30

1983-06-21

Swann, III, Glen R.

Communications: electrical

Audible indication

Ultrasonic pest control

331108C, 331178, G08B 300

Patent

active

043896383

ABSTRACT:
A yelping alarm signal generator has a current controlled audio oscillator with a feedback loop around it that produces a control current that is a direct function of the oscillation frequency so that only one capacitor external to the integrated circuits is required.

REFERENCES:
patent: 3877004 (1975-04-01), Okada et al.
patent: 4001817 (1977-01-01), Squires
patent: 4091335 (1978-05-01), Giolma et al.
patent: 4222040 (1980-09-01), Benson et al.

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