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LNB frequency down conversion integrated circuit and chip, LNB frequency down conversion circuit and method
LNB frequency down conversion integrated circuit and chip, LNB frequency down conversion circuit and method
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机译:LNB降频转换集成电路及芯片,LNB降频转换电路及方法
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摘要
The present invention discloses a type of LNB frequency down conversion integrated circuit. The present invention frequency-down-converts the RF signal with the Quadrature local oscillation signal (LO) and Quadrature Mixer. Then the 90 degree phase-shifting of the quadrature intermediate frequency (IF) signal after mixed is done by the use of passive Polyphase filter. The present invention further discloses a LNB frequency down conversion chip, a LNB frequency down circuit adopting the LNB frequency down conversion chip circuit and a method of LBN frequency down. The invention ensures the elimination of the minor image signal and the realization of the minor image suppression function.
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