We found this circuit in an old Mullard (Philips) documentation. The sensor consists of a reed-switch that is coupled to a magnet on one of the wheels of the vehicle.
The circuit shown allows the test of common silicon diodes. The characteristic curve of the...
The connection of high-value input resistors causes the circuit to behave like a conventional...
Linear Technology's LT213 circuit, which suggests this application in 90s documentation, is not...