This circuit has an automatic dynamic gain control in a range of 6 dB to 40 dB. We found it in documentation from the 90s. The bipolar transistor is a general purpose type.
Using a pair of CK722s, this booster step of a few milliwatts of power was obtained in a 1960...
We found this circuit in a Radio Shack documentation from 1977. The circuit serves for a link of...
Other operational amplifiers can be used on this unit gain amplifier. The circuit is from the 1993...