Patent ID: 8073161

Claim:
An audio apparatus comprising: an input for inputting audio signals; an amplifier having an inverting input and a non-inverting input; a first resistor, wherein one end of the first resistor is connected to the input, the other end of the first resistor is connected to the inverting input of the amplifier, and ground is connected to the non-inverting input of the amplifier; a first capacitor having one end connected to a node between the first resistor and the inverting input of the amplifier, the other end of the first capacitor connected to ground; a second resistor having one end connected to a node between the first resistor and the inverting input of the amplifier, the other end of the second resistor connected to the output of the amplifier; a second capacitor connected between the inverting input and the output of the amplifier; and an output connected to the output of the amplifier, for outputting the audio signals after processing.