Signal detecting circuit for electronic musical instrument

Details Signal detecting circuit for electronic musical instrument Signal detecting circuit for electronic musical instrument

1979-04-17

1981-04-21

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

84 116, 84267, 307358, 307362, 328114, 328132, H03K 5153

Patent

active

042635209

ABSTRACT:
A detection circuit for detecting the rise of vibration of a string of a musical instrument such as a guitar capable of producing a trigger signal accurately at each flipping of the string. The circuit comprises a first system in which a signal obtained by full-wave rectifying a picked up signal from a pickup is compared with a predetermined reference level in a first comparator to produce a first signal, a second system in which a signal obtained by half-wave rectifying the picked up signal and integrating it thereafter is compared in a second comparator with a signal obtained by level-shifting the picked up signal by a predetermined level and a second signal is produced by delaying the speed of response of the output of the second comparator, and a flip-flop circuit to which the first and second signals are applied. The flip-flop outputs a signal each time player flips the string, which is used as a trigger signal for an electronic musical instrument driven by the above-said picked up signal.

REFERENCES:
patent: 4038897 (1977-08-01), Murray et al.
patent: 4080574 (1978-03-01), Loosemore et al.
patent: 4151775 (1979-05-01), Merriman

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