Patent ID: 7924200

Claim:
A system comprising: a first superframe structure including a first-superframe input configured to receive a first pulse width modulated (PWM) signal and including a first-superframe output, the first superframe structure configured to selectively apply a modulation operation to the first PWM signal according to a pre-determined superframe pattern to produce a superframed signal at the first-superframe output; a second superframe structure including a second-superframe input configured to receive a second PWM signal that is a duty cycle complement of the first PWM signal and including a second-superframe output, the second superframe structure configured to selectively apply the modulation operation to the second PWM signal according to a complement of the pre-determined superframe pattern to produce a complementary-superframed signal at the second-superframe output; a switch including a first input coupled to the first-superframe output, a second input coupled to the second-superframe output, a control input, and a switch output, the switch configured to receive a control signal at the control input and to selectively provide one of the superframed signal and the complementary-superframed signal to the switch output as a modulated output signal; and wherein the modulation operation comprises one of a phase shift operation and a chop operation.