Frequency sweeping audio signal device

Details Frequency sweeping audio signal device Frequency sweeping audio signal device

1995-06-02

1997-10-07

Hofsass, Jeffery

Communications: electrical

Audible indication

Electronic siren

34038471, 34038472, 3403821, 116147, G08B 300

Patent

active

056753110

ABSTRACT:
An audio signal is generated that sweeps from a lower frequency to a higher frequency in a substantially linear function. The circuit used to produce this sweeping audio frequency has a stable power supply, a square wave oscillator, a ramp generator, a voltage controlled oscillator, a drive circuit and an audio circuit. The square wave generator is composed of logic gates that generate a square wave with near instantaneous rising and falling edges. The ramp generator creates a sweep drive signal that is a substantially linear triangular waveform.

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Howard W. Sams & Co., Inc., Reference Data For Radio Engineers Fifth Edition, 1973, p. 19-18.

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