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This circuit is a UHF-TV antenna preamplifier with 21dB gain and low noise figure. It is
formed by three stages, the first one is a band pass filter, the second one is an emitter-common
voltage amplifier with low bias current and the last stage is an emitter-common voltage amplifier
with higher bias current to operate.
After assembling, pack it into a proper metallic box and connect the ground of the circuit to the box
to reduce noise effect.
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