| 摘要 |
The digital automatic gain control has a comparison circuit (60,62) comparing the input amplitude with a reference level. A first and second level response is sent to a cyclic response detector, depending on whether the signal is over or under the threshold. The cyclic change detector (80) sends a command code confirming the cyclic relationship with the command signal to the digital controller (50), providing an output response which is maintained at a pre-determined level value.
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