Patent ID: 8335328

Claim:
An integrated circuit for providing a microphone interface, the integrated circuit comprising: an input terminal for receiving an input signal; an output terminal for providing an output signal; a bias circuit, the bias circuit being coupled to the input terminal for providing a bias signal at the input terminal, the bias circuit being configured to provide a sensed input signal; a first amplifier circuit, the first amplifier circuit including a first input, a second input, and an output, the first input being configured to receive the sensed input signal, a first feedback signal, and a second feedback signal, the second input being configured to receive a first reference signal, the output being configured to provide the output signal to the output terminal; a first feedback circuit, the first feedback circuit being in communication with the output and the first input of the first amplifier circuit, the first feedback circuit providing the first feedback signal to the first input of the first amplifier circuit; and a second feedback circuit, the second feedback circuit being in communication with the output and the first input of the first amplifier circuit, the second feedback circuit providing the second feedback signal to the first input of the first amplifier circuit, the second feedback circuit including an integrator circuit.