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 power supply provides a12 V stabilized output. The transistor must be provided with a good...
This circuit, which can be used as a shield, was found in American documentation from the 1970s....
Found in American documentation from the 90s, this circuit shows how to derive a signal in the...