| 摘要 |
PURPOSE:To increase the reliability with a simple constitution, by installing a comparison amplifier circuit right after a tuning high frequency amplifier circuit and furthermore adding a pulse extinction detector circuit. CONSTITUTION:The transmission signal obtained by giving a modulation of amplitude to the carrier wave with the digital pulse signal is amplified by the tuning high frequency amplifier circuit 1 and receives a comparison amplification with a level of comparison at the comparison amplifier circuit 5. The output of the circuit 5 is applied to the pulse extinction detector circuit 6 that has a detection time slightly longer than the period of the carrier wave, i.e., a time constant slightly layer than the carrier frequency. The output of the circuit 6 is turned into the original digital pulse signal. |
