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.
The charging current of this circuit is controlled by the temperature of the accumulators, which is...
We found this circuit in an old documentation from the 70s, but it can be assembled with more...
This circuit was suggested by Philips in 1967 documentation. The circuit receives modulated light and has...