| 摘要 |
According to an embodiment of the present invention, a microphone comprises a biasing circuit to supply a variable bias voltage to a detector. The biasing circuit comprises: a regulator which receives a reference voltage and a control voltage to output a variable voltage; a digital analog converter which receives digital control signals to supply the control voltage to the regulator; and a charge pump which receives the variable voltage outputted from the regulator to output a higher variable voltage. |
