We found this circuit in an old documentation. Its purpose is to turn on warning lights when the vehicle in a garage touches or passes a sensing bar preventing it from hitting the wall.
The output transistor used in this amplifier must have Vce of at least 200 V and Ic of 1 A and...
This circuit is suggested by the Linear Applications Handbook of National Semiconductor, being used...
The circuit shown in the figure was found in the Linear Applications Handbook by National...