Gain 10 Voltage Amplifier (T456E)

This 4-stage circuit has a voltage gain of 10 and negative feedback. The circuit was found in an old MIT publication.

1-Transistor Regenerative Receiver (CB23870E)
We found this simple circuit with headphones listening in Radio Electronics magazine from March...
Voltage Monitor (CB21329E)
This circuit was obtained from Maxim documentation. The circuit has 4.5 and 5.5V thresholds for...
Headphone Amplifier (CB843E)
This complementary-output amplifier can be used to source a good qualuty signal to high impedance...