This circuit is from the 80's and can be implemented with modern operational amplifiers equivalent to 741. The circuit has high input impedance and must be powered by symmetrical source.
![](/images/stories/cir/213212322023_142032_0001.gif)
This circuit is from the 80's and can be implemented with modern operational amplifiers equivalent to 741. The circuit has high input impedance and must be powered by symmetrical source.