This circuit was found in an American 1980s documentation. It analyzes the exhaust gas of a vehicle using a special sensor. The indicator is a milliamperimeter.
This circuit must be powered by a symmetrical source and has a very high input impedance. The...
The circuit shown simulates a programmable unijunction transistor (PUT). Transistors may be common...
This instrumentation circuit can be applied to equivalent operational amplifiers. We found it in...