RADIO COMMUNICATION DEVICE BY BINARY CDMA

摘要

PURPOSE: A wireless communication device by binary CDMA is provided to stably performing the communication against signal interference. CONSTITUTION: A master volume adjusting unit(120) controls the volume of the output audio signal of a second pre-amplifier unit. An echo generating unit(90) changes the audio signal amplified in the second preamp part into an echo signal. An echo combiner(100) synthesizes the output echo signal of the echo generating unit in the audio signal amplified in the second preamp part. The echo combiner outputs the synthesized signal to the master volume control part. A power amp output unit(130) performs audio sound tone control, volume control and amplification control. The power amp output unit outputs the amplified audio signal to the speaker connected to the sound output part.