| 摘要 |
The level of an input high-frequency signal is adjusted by a transmission-level adjusting portion, and two signals are created and distributed by a distribution portion. One of the two signals is output, while the other one thereof is applied to a frequency-deviation adjusting portion to cancel the frequency property of a detection portion and thereafter is applied to the detection portion, where the signal is detected to be a DC voltage. A comparator compares the DC voltage with a reference voltage output from a reference voltage generating portion, and the output of the comparison is used to control a gain of the transmission-level adjusting portion.
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