Patent ID: 7142051

Claim:
A power amplification circuit, comprising: a pulse width modulation signal generating portion operable to produce from an input signal first and second pulse width modulation signals having complementary variations in their respective pulse widths; a first delaying portion operable to delay the first pulse width modulation signal by a first time to produce a first delayed pulse width modulation signal; a first switching amplifier operable to perform a switching operation in response to the first delayed pulse width modulation signal to subject the first delayed pulse width modulation signal to power amplification to produce a first output signal, and to supply the first output signal to a circuit load; a second delaying portion operable to delay the second pulse width modulation signal by a second time different from the first time to produce a second delayed pulse width modulation signal; and a second switching amplifier operable to perform a switching operation in response to the second delayed pulse width modulation signal to subject the second delayed pulse width modulation signal to power amplification to produce a second output signal, and to supply the second output signal to the circuit load.