Patent ID: 7902807

Claim:
A method of modulating an error signal for a multiple switch node power converter having a modulated complementary switching pair controlled by a first modulation ramp and a nonmodulated complementary switching pair controlled by a second modulation ramp, using the first modulation ramp, the method comprising: establishing a first reference duty cycle or pulse width for the modulated complementary switching pair; comparing a present duty cycle or pulse width for the modulated complementary switching pair to the first reference duty cycle or pulse width; generating a plurality of fixed-width or fixed duty cycle pulses when the duty cycle or pulse width for the modulated complementary switching pair is equal to or substantially equal to the first reference duty cycle or pulse width; and introducing the plurality of fixed-width or fixed duty cycle pulses to the nonmodulated complementary switching pair while continuing to modulate the modulated complementary switching pair using the first modulation ramp.