1973-12-21
1976-08-10
Claffy, Kathleen H.
G10L 100
Patent
active
039743349
ABSTRACT:
A complex waveform synthesizer comprises a plurality of digital oscillators producing unit waveforms at distinct frequencies and constituted by respective storage zones storing, as digital words, the momentary values of the waveforms. The required amplitudes of the waveforms are produced by a digital modulator supplied with trains of digital desired amplitude values from a digital interpolator receiving corresponding trains of desired digital values at a slower rate than those supplied by the interpolator. The modulator supplies the waveforms, with an amplitude definition greater than that of the desired values supplied to the interpolator, to a digital accumulator which combines the digital words it receives to produce a series of digital words defining a complex waveform which is the sum of the individual waveforms defined by the series of words emerging from the modulator.
REFERENCES:
patent: 3183303 (1965-05-01), Clapper
patent: 3697699 (1972-10-01), Gluth et al.
patent: 3703609 (1972-11-01), Gluth
Claffy Kathleen H.
Electronic Music Studios (London) Limited
Kemeny E. Matt
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