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45_MHz_IF_AMPLIFIER_WITH_CRYSTAL_FILTER

2017-02-12 09:11  
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45_MHz_IF_AMPLIFIER_WITH_CRYSTAL_FILTER
A 40673 dual-gate MOSFET is matched to a crystal filter at 45 MHz. The filter impedance is around 2kΩ. The + 4-V source can be made variable for gain control (about +4 to -4V.)