Patent ID: 7816965

Claim:
A cooperation circuit, comprising: a first control module, capable of generating a first control signal and a second control signal, the frequency and the pulse width of the first control signal being determined by the frequency and the pulse width of the second control signal; and a second control module, coupled to the first control module to receive the first control signal and the second control signal and generate a third control signal according to the first control signal and the second control signal; wherein the frequency of the first control signal equals the frequency of the second control signal multiplied by the number of enabled cooperated control modules, and the pulse width of the first control signal equals to the remainder of the pulse width of the second control signal divided by the cycle of the first control signal; wherein the second control module causes a phase delay between the phase of the third control signal and the phase of the second control signal according to the first control signal and the second control signal.