US Patent 7154313 Wideband spread spectrum clock

A method and apparatus are described. The method comprises generating a clock signal comprising regularly spaced clock-timing transitions between a signal high and a signal low to provide timing for a circuit coupled to the clock signal, and periodicity-disrupting transitions between the signal high and signal low, randomly inserted between the clock-timing transitions to disrupt a periodicity of the regularly spaced clock-timing transitions; and transmitting the clock signal to the circuit.