| 摘要 |
A stereo headphone deleting TDD(Time Division Duplex)-noise and a method thereof are provided to remove the TDD-noise included in an audio signal, by outputting the audio signal through a virtual ground single-ended method by on/off of a virtual ground port and outputting a voice call signal through BTL(Bridge Tied Load) method. A first speaker(120a) and a second speaker(120b) are connected serially. A control part(130) inputs a left signal and a right signal to an input port of the first and the second speaker respectively when an audio signal is applied, and inverts and inputs one of the left signal and the right signal to the input port of the first and the second speaker when a voice call signal is applied, and connects a common port of the first and the second speaker to a virtual ground port. An amplifier(140) is connected between the first and the second speaker and the control part. The control part turns on the virtual ground port when the audio signal is applied, and turns off the virtual ground port when the voice call signal is applied. |
