Multichannel digital synthesizer and modulator

Details Multichannel digital synthesizer and modulator Multichannel digital synthesizer and modulator

1975-11-18

1977-01-11

Grimm, Siegfried H.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

84 101, 178 66R, 325141, 328 14, 332 17, 332 21, 332 22, H03K 700

Patent

active

040030032

ABSTRACT:
Apparatus for generating a coherent multichannel signal. The signal for each channel can be independently phase, frequency and amplitude modulated. The coherent multichannel signal is locked to a reference signal. A frequency generator establishes, at each output sample time, the phase information for each channel. A waveshape section converts the phase information into amplitude information to generate the desired waveforms. A multiplier amplitude modulates the generated waveforms which are converted into an analog voltage and fed to a low pass filter for smoothing the output and eliminating undesired high frequencies.

REFERENCES:
patent: 3497625 (1970-02-01), Hileman et al.
patent: 3668562 (1972-06-01), Fritkin
patent: 3787785 (1974-01-01), Bass

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