| 摘要 |
The AGC circuit is provided with circuitry to change the mormal time constant of the AGC loop in accordance with the amplitude of incoming pulsate noise. When receiving an input signal with a normal amplitude, the AGC circuit selects the time conatsnt for normal AGC operation, and the response speed of the AGC operation is the normal speed. When the received signal has an amplitude exceeding a given value for a short time, for examole, the AGC circuit selects a longer time constsnt than the time constant for normal AGC operation
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