The circuit shown in the figure can be designed with more modern operational amplifiers, as it is from 1994 documentation by National Semiconductor. The power supply must be symmetrical.
This is a high voltage probe that allows the measurement of high continuous voltages with a common...
This oscillator provides a 1 MHz rectangular signal determined by the capacitors used. The circuit...
This circuit was found in a 90s Popular Electronics. The sensor can be any phototransistor. ...