| 摘要 |
A received low-frequency standard radio wave, which is an amplitude modulation signal, is converted to an intermediate frequency signal Sa, and is output to a detection circuit and an AGC circuit. The detection circuit and AGC circuit generates an RF control signal Sf 1 and IF control signal Sf 2 from the input intermediate frequency signal Sa, and controls an RF control circuit and IF control circuit by outputting the generated RF control signal Sf 1 and IF control signal Sf 2 to the RF control circuit and IF control circuit. By this a radio wave reception device can speed up AGC operation.
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