| 摘要 |
PURPOSE: A microphone suitable for a wireless earphone is provided to simplify an algorithm that is used in processing a radio signal, and decrease a manufacture price. CONSTITUTION: A transmission part(110), installed in a terminal(U), includes amplifiers(111,113,115), an oscillator(112) and an overlap part(114). A reception part(120), installed in the earphone, includes an amplifier(121). The amplifier(111) amplifies a voice signal applied from the terminal(U). The oscillator(112) generates carrier wave with radio frequency. The amplifier(113) amplifies the carrier wave applied from the oscillator(112). The overlap part(114) overlaps the voice signal applied from the amplifier(114) with a radio frequency signal of the carrier wave applied from the amplifier(113). The amplifier(115) amplifies the overlapped signal applied from the overlap part(114), and then outputs it via an antenna. The amplifier(121) selects the signal transmitted from the transmission part(110) via an antenna, and then amplifies the selected signal while restraining a noise from being included in the selected signal. The signal amplified by the amplifier(121) is applied to a speaker(S) of the earphone.
|
