Found in documentation from the 1980s, this circuit uses an operational amplifier from that time. Transistors are also from the era, and general-purpose equivalents can now be used.
This circuit is from a 1966 documentation. The transistor is made of germanium of the time and the...
This application consists of a circuit that trips when the sensor resistance drops below a few...
With this circuit it is possible to have a symmetrical source from a simple source with voltages from...