Patent ID: 8254598

Claim:
An integrated circuit for providing a programmable microphone interface, the integrated circuit comprising: an input terminal for receiving an input signal from a microphone; an output terminal for providing an output audio signal; a bias circuit, the bias circuit being coupled to the input terminal to provide a microphone bias signal to the microphone; 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 input in response to a first mode control signal and to receive a feedback signal in response to a second mode control signal, the second input being configured to receive the feedback signal in response to the first mode control signal and to receive the input signal in response to the second mode control signal, the output providing 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 including a first resistor and a first capacitor connected in parallel; and a second feedback circuit, the second feedback circuit being in communication with the output of the first amplifier circuit and providing the feedback signal, the second feedback circuit including an integrator circuit.