This 2002 documentation circuit is suitable for automotive use. The circuit is based on an integrated that is not common today and has a medium power stage with a BD135.
With this circuit it is possible to obtain an input resistance of 100Gohms for a multimeter, with...
This amplifier, to detect biological signals in implanted transmitters, uses transistors such as...
This application is not modern since few computers have parallel ports. But you can use this...