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.
Found in Motorola documentation from the 90's, this circuit charges the capacitor with a constant...
This circuit has two high-impedance inputs. The gain is high and more inputs can be added. Use a...
We found this circuit in the Philips Databook of 1990. The circuit is indicated for low-cost...