This filter is current driven and has the formulas given by the two diagram options. The circuit is from an American documentation from the 90s applying to any operational amplifier.
This circuit was taken from a Popular Electronics from January 1967. Transistors are from the...
Found in a 1967 publication by General Electric, this SCR circuit generates voltages of 120 VAC at...
The critical point in this project is the adjustment of the optical system, mainly to avoid...