Control circuitry for a voltage-controlled type electronic music

Details Control circuitry for a voltage-controlled type electronic music Control circuitry for a voltage-controlled type electronic music

1975-11-26

1977-03-22

Witkowski, Stanley J.

Music

Instruments

84DIG2, 84DIG20, 84DIG23, G10H 100, G10H 502

Patent

active

040129802

ABSTRACT:
This invention discloses control circuitry for an electronic musical instrument including a keyboard, a voltage divider circuit coupled to the keyboard to provide a pitch determining voltage signal corresponding to a depressed key, a storage capacitor for storing the pitch determining voltage signal, voltage-controlled tone signal generating means responsive to the pitch determining voltage signal and adapted to produce a tone signal corresponding to the depressed key, and control voltage waveform generating means responsive to a trigger signal and adapted to produce a control voltage waveform which is coupled to the voltage-controlled tone signal generating means so as to control the tone signal to be generated thereby. The control circuitry includes a first and a second gate means both coupled in series between the voltage divider circuit and the storage capacitor, and circuit means coupled to the voltage divider circuit so as to provide the trigger signal for the control voltage waveform generating means and first and second gate signals which are coupled to, and adapted to enable, respectively the first and second gate means.

REFERENCES:
patent: 3715444 (1973-02-01), Pearlman
patent: 3781450 (1973-12-01), Nakajima
patent: 3828110 (1974-08-01), Colin
patent: 3861263 (1975-01-01), Okudaira
patent: 3872764 (1975-03-01), Munch, Jr. et al.
patent: 3886834 (1975-06-01), Okamoto
patent: 3886836 (1975-06-01), Hiyoshi
patent: 3897709 (1975-08-01), Hiyoshi et al.
patent: 3902392 (1975-09-01), Nagahama
patent: 3902396 (1975-09-01), Hiyoshi
patent: 3922943 (1975-12-01), Niinomi

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