This circuit appeared in the September 1973 issue of Radio Electronics magazine and was recommended for a synthesizer project. The circuit is for audio signals and has control inputs.
A constant current source can be built based on one of the LM3900 or LM2900 amplifiers, as shown in...
This circuit was found in a 1973’s Japanese magazine. It uses transistors of the time and is...
We found this circuit in a 1980s General Electric documentation. It appears from other sources in this...