This filter has a regulated source configuration. It can be implemented with almost any operational amplifier. The formulas for calculating the components are attached to the diagram.
This circuit measures the conductivity of a saline solution, which is affected by the electrolysis effect....
This circuit was found in a publication by National Semiconductor. The problem for designers who...
This counterphase circuit is from a 1973 publication, and can work with mains voltages or 12 V....