Patent ID: 8044719

Claim:
A class D amplifier circuit for generating a pulse signal whose pulse width is modulated in response to an input signal, the class D amplifier circuit comprising: a first switching element having a first end set to a power supply potential and a second end electrically connected to a first node; a second switching element having a first end set to a reference potential and a second end electrically connected to the first node; a third switching element having a first end electrically connected to a second node and a second end set to the reference potential; a first capacitance element having first and second electrodes electrically connected to the first and second nodes respectively; a fourth switching element having a first end electrically connected to the first node and a second end electrically connected to an output end; a fifth switching element having a first end electrically connected to the second node and a second end electrically connected to the output end; and a control section that controls transition between a conduction state and a non-conduction state of each of the first to fifth switching elements to control a current direction flowing into a load having a first end electrically connected to the output end and a second end set to the reference potential, so that the current flows from the first end of the load to the second end of the load at a first timing and the current flows from the second end of the load to the first end of the load at a second timing.