Warble signaling device

Details Warble signaling device Warble signaling device

1985-09-23

1986-12-02

Grimm, Siegfried H.

Oscillators

Plural oscillators

Oscillator used to vary amplitude or frequency of another...

331 49, 331 52, 331 55, 331111, 331108D, 331153, 331DIG3, 340384E, G08B 310, H03B 524, H03K 303

Patent

active

046267999

ABSTRACT:
There are three oscillator circuits which oscillate at different frequencies, each oscillator circuit including a gate having an input and an output. The output of the first gate is connected to an inverter and the input of the second gate. The output of the inverter is connected to the input of the third gate. The output of the second and third gates is connected across a piezoelectric transducer to produce a warble sound.

REFERENCES:
patent: 3416065 (1968-12-01), Redfern
patent: 4193060 (1980-03-01), Slavin
patent: 4558305 (1985-12-01), Black et al.
Plummer, "Oscillators Using TTL Schmitt Trigger Gates", New Electronics, vol. 13, No. 17, 2 Sep. 1980, p. 34.
Button, "Two Tone Burst Generator Has Nanoamp Standby Current", Electronic Product Design, Jul. 1981, p. 29.
Ritchie, "PIP Generator", Practical Electronics, vol. 17, No. 3, p. 62.
Hee-haw Siren for Toy Cars, by Gerald Cohn, Electronics, Australia, Jun. 1980, pp. 77, 79.

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