Amplifier and buffer (CB7138E)

Found in a Popular Electronics from the 90s, this circuit can be made with current equivalent transistors.

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Modulated Light Receiver (CB18638E)
This circuit can be used to receive signals from CB18636E and other modulated light transmitters in this...
LM359 High-Gain General-Purpose Amplifier (CB14372E)
The LM359 is a Norton amplifier not common today. The presented configuration has 1000 voltage gain....
1.5 mW Amplifier (CB6289E)
This very low power amplifier is designed by Amperex for hearing aids. It is based on TAA370 which is...