Tone-pip-signal generator

Details Tone-pip-signal generator Tone-pip-signal generator

1982-09-29

1986-07-29

Caldwell, Sr., John W.

Communications: electrical

Audible indication

Ultrasonic pest control

34082548, 307236, 307262, G08B 300, G08B 522, H03K 522

Patent

active

046033246

ABSTRACT:
A tone-pip signal generator for use in systems employed in the identification and diagnosis of hearing defects, the generator including a counter for counting cycles of a clock signal which occur following the time marked by a reset signal, a gate circuit for coupling the clock signal to the counter until a predetermined count is accumulated, a memory addressed by the counter, the memory for retrieving in succession stored numbers representing respective time samples of the tone-pip signal and a digital-to-analog converter driven by the memory. Additionally, the generator includes an exclusive-OR-gate array for selectively inverting the tone-pip signal.

REFERENCES:
patent: 3529086 (1970-09-01), Atchison et al.
patent: 3541355 (1970-11-01), Kan
patent: 4090349 (1978-05-01), Takase
patent: 4417218 (1983-11-01), Berke
Elektor, vol. 5, No. 6, Jun. 1979, p. 6-12 to 6-16, "Programmable Doorbell".

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