The present invention discloses a load-dependent frequency jittering
circuit, comprising: a load condition detection circuit for receiving a
switching signal and generating an output according to a load condition;
a number generator for receiving the output of the load condition
detection circuit and generating a number; a digital to analog converter
for converting the output of the number generator to an analog signal;
and an oscillator for generating a jittered frequency according to the
output of the digital to analog converter.