5-26 IF amplifier project; (A) completed project: (B) input end; (C) output end; (D) input amplifier stage; and (E) output amplifier circuit.
tn when the ATTN is high (i.e., 2.4 V < V < 5.2 V ), then K\ is energized and inserts the -20-dB attenuator in the path.
The IF amplifier of Figs. 5-25 and 5-26 provides about 80 dB of gain at 455 kHz.
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