| 摘要 |
PURPOSE: A method for minimizing signal interference between wireless microphones and an apparatus thereof are provided to minimize mutual interference by providing different guide tones by channel or group through a multi guide tone access method. CONSTITUTION: A wireless microphone(100) comprises a transmitter control unit(2), a phase-locked loop(4), a voltage controller oscillator(6), an RF transmitter(8), and a transmission antenna(10). The wireless microphone comprises a crystal oscillator(12), a power switch(14), a sound signal input unit(16), a sound signal amplification unit(18), and a guide tone output port(20). The audio processing unit comprises the sound signal input unit and the sound signal amplification unit. A wireless unit comprises the phase-locked loop, the voltage controlled oscillator, the RF transmitter, and the transmission antenna. The wireless unit modulates sound signals processed from the audio processing unit. [Reference numerals] (10) Transmission antenna; (100) Wireless Microphone(Transmitter); (16) Sound signal input unit; (18) Sound signal amplification unit; (2) Transmitter control unit; (20) Guide tone output port; (4) Phase-locked loop; (6) Voltage controller oscillator; (8) RF transmitter; (AA) Charge pump; (BB) PLL data; (CC) Crystal oscillation unit |
