This circuit simulates the effect of an inductance. Equivalent operational amplifiers can be used, and the power supply must be symmetrical. The circuit is from a 90's Poptronics.
We found this circuit in the March 1994 issue of Electronics Now magazine. The transistor is...
This circuit with two transistors was found in ancient European documentation. Transistors support...
Found in American documentation from the 1980s, this circuit makes use of components of the time,...