Patent ID: 6859096

Claim:
A class D amplifier comprising: a modulating circuit which modulates a input signal into a pulse signal; a first driving circuit which drives a first output transistor which outputs a signal level corresponding to a high power supply to an output terminal; a second driving circuit which drives a second output transistor which outputs a signal level corresponding to a lower power supply to the output terminal, wherein the pulse signal is supplied to the first and second driving circuits to complementarily drive the first and second output transistors; a first detecting circuit disposed in the first driving circuit, which detects an overcurrent flowing through the first output transistor to output a first signal; a second detecting circuit disposed in the second driving circuit, which detects an overcurrent flowing through the second output transistor to output a second signal; and a gate circuit which, in response to one of the first and second signals, blocks the pulse signal to be input to the first and second driving circuits.