An adjustable spread spectrum clock generator and a method thereof

摘要

The invention provides an apparatus and a method for generating spread spectrum clock signals, the method comprising the steps of: (1.a) determining a relationship R between a fundamental period T of a clock signal and a period offset DT; (1.b) receiving a clock signal having the fundamental period T; (1.c) of adjusting the delay step DS so that the spread spectrum clock signal to be produced during step (1.d) has a period that ranges between (T-DT) and (T+DT). (1.d) producing a spread spectrum clock signal having a period that ranges between (T-DT) and (T+DT). Steps (1.c) and (1.d) can be repeated either constantly, in manner that compensated for either variations in the delay step, in the variable delay period and/or for changes in the fundamental period . <IMAGE>