Pitch determining voltage signal generating circuit for a voltag

Details Pitch determining voltage signal generating circuit for a voltag Pitch determining voltage signal generating circuit for a voltag

1975-03-12

1976-04-06

Hix, L. T.

Music

Instruments

84DIG2, 84DIG8, 84DIG20, G10H 100, G10H 502

Patent

active

039481379

ABSTRACT:
This invention is directed to a keyboard circuit for generating pitch determining voltage signals whose voltage values exponentially vary with respect to notes. Key switches are connected between a DC voltage source and a voltage dividing resistance network, thus making it possible to use key switches having a simpler contact construction. Nevertheless, the keyboard circuit of the invention can act as a lower or higher tone preference circuit.

REFERENCES:
patent: 2403664 (1946-07-01), Langer
patent: 2874286 (1959-02-01), Bode
patent: 3190951 (1965-06-01), Anderson
patent: 3417188 (1968-12-01), Munch, Jr.
patent: 3733955 (1973-05-01), Reinagel et al.
patent: 3745225 (1973-07-01), Hall
patent: 3766305 (1973-10-01), Schrecongost
patent: 3786166 (1974-01-01), Mieda
patent: 3813474 (1974-05-01), Ippolito
patent: 3880039 (1975-04-01), Studer

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