This circuit operates from 20 Hz to over 20 kHz and is easily tunable. We found it in a 70s documentation. The circuit can be implemented with modern operational amplifiers.
The transistor in this circuit can be replaced with any general-purpose equivalent. The time...
In the figure we present a circuit that has an insulation voltage of 2,500 V at 60 Hz and...
The circuit shown is based on National Semiconductor buffers and was found in the 1994 Linear...