Patent ID: 7313244

Claim:
A circuit for eliminating pop noise including a power PMOS transistor having a source to which a first power supply voltage is applied and a drain connected to an output terminal, a power NMOS transistor having a drain connected to the output terminal and a source to which a second power supply voltage is applied, a gate controller that controls a gate of the power PMOS transistor and a gate of the power NMOS transistor, and an output-terminal filter having an inductor and a capacitor, the circuit comprising: a first switch, which is connected between the first power supply voltage and the gate of the power PMOS transistor; a second switch, which is connected between the second power supply voltage and the gate of the power NMOS transistor; and a switch controller, which directly senses the first power supply voltage and the second power supply voltage and generates a first control signal for controlling the first switch and a second control signal for controlling the second switch, wherein the switch controller turns on the first switch and the second switch until the first power supply voltage and the second power supply voltage reach respective threshold voltages and turns off the first switch and the second switch after the first power supply voltage and the second power supply voltage reach respective threshold voltages.