This is the traditional voltage follower configuration with the 741 operational amplifier. The circuit is from 1976 documentation and the power supply must be symmetrical from 6 to 15 V.
I found this circuit in a 1978 publication. The circuit can be assembled with a BD136 transistor to...
This sensitive 4-transistor signal follower can be used in both audio and RF circuits. P1 is a...
This is a commercial circuit from the year 1958. Transistors are germanium types and transformers...