Three transistor bridge circuits (10a-10d, 11a-11d, 11e-11h) for the motor are divided into six electric circuits.

The windings or phases of the motor are connected to individual pairs of drive transistors incorporated in a transistor bridge.

transistor in full bridge configuration

A field effect transistor has a floating gate with an extended portion.

The half bridge can have two circuits with such a transistor.

The driver comprises a H-bridge (1) and a control circuit (2).

The level shifter further includes a power rail that is coupled to the switch between the first transistor and the second transistor.

An input terminal of the second power driver transistor (Q5) is connected to a half bridge circuit comprising a; first pre-driver transistor (Q3) and a second pre-driver transistor (04) complementary to the first pre-driver transistor <Q3).

The feedback circuit comprises a capacitive bridge (Ca, Cb) and a second transistor (Q3).

Two complementary MOSFET transistors are series connected in each branch of the bridge and a comparator (90, 92, 90', 92') is associated with each MOSFET transistor of the bridge circuit (78) for the control thereof.

Owing to the diode bridge, the current through the transistor flows in one direction.

The field effect transistor includes an off switch gate (42) and a switch bridge (44).

In addition, the collector-emitter section of the turn-off transistor (T3) is directly between the base of the lower transistor (T2) of the half-bridge generator and earth.

An output node on a plus side of a diode bridge (DB2) is connected to a drain of a transistor (Q1), and a source of the transistor (Q1) is connected to an output node on a minus side of the diode bridge (DB2).

The FET S can be pulsed so that the inductor L generates a voltage to charge the capacitive load CL via an H-bridge H, which is in parallel with the FET S. A diode D prevents current discharging from the capacitive load CL while the FET S is closed.