This midrange filter for sound systems was found in the May 1988 issue of Radio Electronics magazine. The circuit is based on a dual amplifier that must be powered by a symmetrical source.
This low current parallel or shunt type regulator was found in documentation from the 60's. The...
We show in the figure how to implement a current monitor circuit using only an operational...
Using circuits from Analog Devices, this circuit does not need a symmetrical power supply. It is...