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.
The circuit shown in the figure can be useful in cases where a common telephone extension is used....
This circuit uses two operational amplifiers that admit equivalents. The configuration is from...
This circuit was found in General Electric documentation from 1966. The circuit is suitable for any...