This high impedance circuit was found in 1967 documentation by Ferranti. The original operational amplifier is from that time. The circuit can be implemented with modern equivalents.
In high voltage sources, it is recommended to quickly discharge the filter capacitors to avoid...
This second amplifier is based on the integrated LM108 and has a differential input. The resistor...
This integrating circuit multiplies the time that can be obtained with a 555 timer. We find it in...