A digital-to-analog noise generator

A simple scheme of the noise voltage generator with a Gaussian instantaneous-value distribution and specified energy spectrum bounds is presented. The scheme is based on emitter-coupled logic (ECL) microcircuits. As reference noise, the “digital” noise of the pseudorandom number generator, which is expressed via the contents sum of the set of its adjacent bits, is used. The “digital” noise is converted into an analog voltage by adding current quanta produced by the ϰ500ЛП115 differential receivers. The main characteristics of the device are as follows: the peak-to-peak amplitude of the differential noise voltage is 600 mV and the distribution law is normal. The noise energy spectrum is bounded from above by the clock rate and from below by the number of bits of the pseudorandom number generator. In the tested prototype with a clock rate of 10 MHz, it varies from 78 kHz to 6 MHz.