Function generators of time-dependent variable type

Details Function generators of time-dependent variable type Function generators of time-dependent variable type

1979-10-24

1981-05-19

Truhe, J. V.

Music

Instruments

84 126, 364569, 364722, G10H 106, G06F 102

Patent

active

042677637

ABSTRACT:
A function generator of time-dependent variable type especially suitable for use as an envelope waveshape generator of an electronic musical instrument is constituted by means for setting multi-bit digitalized information which represents time information in terms of a logarithm, dividing means for dividing the bits of the time information into upper order bits and lower order bits at a bit of a predetermined order, means for converting a portion of the information represented by the lower order bits into linear information, a timing pulse generator which produces a timing pulse having a period corresponding to a value obtained by converting a portion of the information represented by the higher order bits into a natural number, and an accumulator for accumulating the output produced by the information converting means at a period of the timing pulse thereby producing an accumulated value as the time function waveshape which varies with time at a rate corresponding to the time information.

REFERENCES:
patent: 3632996 (1972-01-01), Paine et al.
patent: 3952623 (1976-04-01), Deutsch
patent: 4138915 (1979-02-01), Nagai et al.
patent: 4215614 (1980-08-01), Chibana

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