| 摘要 |
PURPOSE:To reduce the cost of a decoder, by realizing a common use of a D/A converter for both coding and decoding even in case the received PCM signal is not synchronous with the transmitted PCM signal. CONSTITUTION:The side of transmission includes the oscillator 5 which produces the clock having the frequency 2fD double the frequency fO of the transmitted PCM signal clock, the modulator 1, front-stage amplifier 2, the sample holding amplifier 3, the comparator 4 and the code logical circuit 6. The side of reception includes the decoding logical circuit 16, the decoding selection circuit 15 which selects the decoding period, the D/A converter 14, the rear-stage amplifier 12, the parallel- connection sample holding amplifiers 17 and 18, and demodulator 11. |
