| 摘要 |
A television reception circuit includes a high-frequency amplifier amplifying a received television signal, a mixer frequency-converting the amplified television signal to an intermediate-frequency signal, a filter attenuating a component outside a prescribed frequency band in the resultant intermediate-frequency signal, a first AGC circuit outputting a first gain control signal for setting a level of the intermediate-frequency signal output from the mixer to a prescribed value, a second AGC circuit outputting a second gain control signal for setting a level of the signal that has passed through the filter to a prescribed value, and a switch selecting any one of the first gain control signal and, the second gain control signal and outputting the selected gain control signal to the high-frequency amplifier, and the high-frequency amplifier amplifies the television signal with gain based on the gain control signal received from the switch.
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