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Television tuner which does not deteriorate picture quality even at the time of weak electric field
Television tuner which does not deteriorate picture quality even at the time of weak electric field
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机译:即使在弱电场下也不会降低画质的电视调谐器
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摘要
A television tuner contains a mixer unit for converting a television signal into an intermediate frequency signal and an intermediate frequency tuning circuit provided at the next stage of the mixer unit for passing the intermediate frequency signal. The intermediate frequency tuning circuit is switched such that a tuning frequency has different values according to whether the television signal is at least a weak electric field or a strong electric field. The tuning frequency is tuned to a frequency close to a picture intermediate frequency when the television signal is at least the weak electric field, and the tuning frequency is tuned to a frequency close to a sound intermediate frequency when the television signal is at least the strong electric field.
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