Circuit and method for inducing jitter to a signal

Abstract

A jitter inducing circuit receives a reference pulse train and induces desired amounts of jitter to the rising and/or falling edges of the pulses. First and second delay blocksandalternately delay the selected edge or edges of the provided reference pulse train interval by preset delay times for every interval. A signal composercomposes the outputs of the first and second delay blocksand. A delay time setup circuit controls the delay times of the delay blocksand. The delay times may change for each interval as a function of time so as to trace a desired function such as a sinusoidal or triangular function.