The purpose of this circuit is to extend the range of applications from a Darlington pair to DC. The circuit is from an American documentation from 1970.
This circuit is from a technical documentation from Texas Instruments from 1978. In it we have the...
We found this circuit in a publication with experiments with operational amplifiers from 1973. The...
Using a varactor or varicap, this 1969 Electronics World circuit has a modulation range from 75...