Patent ID: 9215526
Filing Date: 2015-12-15
Classification: H04R

Abstract:
1. A circuit for microphone pin assignment detection, the microphone including at least a first signal output terminal and a second signal output terminal, an electric signal between the first signal output terminal and the second signal output terminal corresponding to an audio signal received by the microphone, the circuit for microphone pin assignment detection comprising: a pin switch unit including a first input terminal, a second input terminal, a first output terminal and a second output terminal, the first input terminal coupled to the first signal output terminal, the second output terminal coupled to the second signal output terminal, according to a control signal the pin switch unit configuring the first input terminal or the second input terminal to the first output terminal and the second input terminal or the first input terminal to the second output terminal; and a detection unit including an impedance element, the detection unit providing a test voltage to the first output terminal through the impedance element, adjusting the control signal according to an output voltage between the first output terminal and the second output terminal and holding the control signal according to a pin insertion signal, wherein the detection unit comprises: