Gegen die Polaritätsumkehr seiner Versorgungsbatterie geschützte elektronische Schaltung.

摘要

A guarded electronic circuit (1) from reversal of its supply battery (2) polarity comprises a MOS power transistor (T1) connected between one pole (Vc) of the battery (2) and ground, to drive an electric load (RL) to ground, and a second, protection MOS transistor (T2) connected between the pole (Vc) and the first transistor (T1); said transistors (T1,T2), which are both provided with respective inherent diodes (D3,D4) between the source and the drain, have their related drain electrodes (D1,D2) connected together. The resulting circuit (1) is self-protected against possible reversal of the polarity of the battery to which it is connected, and can protect the electric load (RL) driven thereby.