Abstract: Noise is input to a frequency generation circuit which includes a demodulator stage with a multiplier circuit in which the noise is multiplied by means of a feedback signal. The result of the multiplication in the demodulator stage is passed through a low pass filter. In a modulation wipe-off stage of the frequency generation circuit, the sign of the filtered multiplier output is extracted using a comparator circuit. The comparator circuit output is passed to a correlator circuit. In the correlator circuit, the comparator circuit output multiplies a delayed version of the input noise which is provided by a delay circuit element. The correlator circuit generates quadrature signals. Summation of the quadrature signals followed by bandpass filtering and amplitude limiting yields a discrete synthesized frequency signal.