| 摘要 |
PURPOSE: The system and the method for a digital/analog wireless broadcast are provided to increase the quality of listening test and education, to enable many wireless microphone sets to be used in the same area, and to increase the number of channels of the wireless microphone sets with a band of 900MHz, by improving the method of the communication between the wireless microphone sets. CONSTITUTION: A wireless telephone and microphone device(100) includes a control circuit(101), a transceiver circuit(102), and a frequency synthesizer(103) for demodulating a radio signal to output it to a speaker, and modulating a transmission signal from the microphone to send it to a transmission circuit(104). A wireless microphone receiver(200) includes a control circuit(201) and a receiver circuit(202) for separating data and voice from the radio signal applied from the device(100), and transferring the separated voice to a frequency synthesizer(203). An audio output device(300) includes an amplifier set(301), a speaker(302) connected to the amplifier set(301), a cassette deck(303) and a tuner(304). |
