Driver protection circuit for preventing damage due to line contact with ground or supply voltage

摘要

This circuit is inserted between a terminal (RGB) and a line (LI). The signal of the input terminal (RGB) is applied to the base of a bipolar amplifier transistor (T2) mounted with a top load (LR1) and a bottom load (LR2). A series transistor (T1) mounted in series in the main signal path has its collector wired up as an electrode for receiving the input signal, its emitter feeds a line (LI), and its base is linked by a resistor to the collector of the second transistor.