Digital-to-analog noise generator

摘要

A noise generator that is responsive to digital noise quality and noise modulation input signals to provide a controller noise signal to a voltage controlled oscillator. The noise generator adds a center frequency input signal, a weighted random noise signal, and a weighted wobbulated waveform signal to obtain a controlled digital noise signal and converts this noise signal from digital form to analog form to provide a noise generator output signal that controls the voltage controlled oscillator. The center frequency and modulation of the noise generator output signal spectrum are determined by the center frequency and weighted wobbulated waveform signals, respectively, and the range of the output signal spectrum is determined by the weighting of the random noise signal. A ramp input signal, which is converted from digital to analog form, is integrated and added to the noise generator output signal to further define the quality and range of the output signal spectrum.