Found in Analog Devices documentation, this circuit uses components from the time. Formulas for component calculations are given along with the diagram.
This filter for the 300 Hz to 3 kHz range was found in an American documentation from the 90's....
A very interesting integrated circuit for step-down converter designs (voltage reducers) with an...
We found this circuit in the 1994 Linear Applications Handbook from National Semiconductor. The...