| 摘要 |
PURPOSE:To obtain a high-precision squelch signal by generating a squelch signal if a measured field level is lower than the contents of a storage circuit in a radio receiver which receives a digital signal. CONSTITUTION:The electric field E of a received signal is measured to output a voltage x1 proportional to the received electric field E. Electric field information x1 is stored in a storage circuit 5 in accordance with the output x4 of a discriminating circuit 4. Since a sotred value x5 corresponds to the jitter quantity of received data, a high-precision result is obtained if the electric field information x1 is compared with the stored value x5 to obtain the squelch signal. |
