Method and circuitry for digital-analog frequency generation

Details Method and circuitry for digital-analog frequency generation Method and circuitry for digital-analog frequency generation

1976-04-09

1978-02-14

Weldon, Ulysses

Music

Instruments

84 101, 84 103, 84 117, G01H 102

Patent

active

040732096

ABSTRACT:
A method and circuitry for frequency generation, especially for electronic organs, in which a digital signal is developed by the actuation of an element such as a key of an organ keyboard. The digital signal is converted to a respective voltage signal and the voltage signal is employed to control a voltage controlled oscillator which supplies a signal corresponding in frequency to the actuation of the aforesaid element. An organ provided with a system for frequency generation according to the present invention can be operated monophonically or polyphonically and is capable of producing desirable effects, including celeste and portamento effects.

REFERENCES:
patent: 3234485 (1966-02-01), Graser
patent: 3288904 (1966-11-01), George
patent: 3515792 (1970-06-01), Deutsch
patent: 3538804 (1970-11-01), George
patent: 3795755 (1974-03-01), Uchiyama
patent: 3809792 (1974-05-01), Deutsch
patent: 3854366 (1974-12-01), Deutsch
patent: 3929053 (1975-12-01), Deutsch
patent: 3930429 (1976-01-01), Hill
patent: 3965789 (1976-06-01), Pearlman
patent: 3986423 (1976-10-01), Rossum

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