Abstract: The invention relates to a circuit arrangement (12) for monitoring and triggering an igniter (5) of an active electrical fuse (6). The arrangement comprises: a control and evaluation unit (1), an alternating current generating unit (2) activated by the control and evaluation unit (1), an alternating current transmission unit arranged between the igniter (5) and the alternating current generating unit (2), the control and evaluation unit (1) being designed and programmed, in a first operational state, to determine the electrical resistance of the igniter (5) from a current detected on the primary side and a voltage detected on the primary side, the value of the resistance being a measure for tripping of the igniter (5), and, in a second operational state, to trigger the igniter (5) by means of the alternating current generating unit (2).

Abstract: The invention relates to a circuit arrangement (12) for monitoring and triggering an igniter (5) of an active electrical fuse (6). The arrangement comprises: a control and evaluation unit (1), an alternating current generating unit (2) activated by the control and evaluation unit (1), an alternating current transmission unit arranged between the igniter (5) and the alternating current generating unit (2), the control and evaluation unit (1) being designed and programmed, in a first operational state, to determine the electrical resistance of the igniter (5) from a current detected on the primary side and a voltage detected on the primary side, the value of the resistance being a measure for tripping of the igniter (5), and, in a second operational state, to trigger the igniter (5) by means of the alternating current generating unit (2).

Abstract: A drive device for a push-pull stage includes a microcontroller in the form of a pulse-width modulator which, starting with a selected switching frequency, varies the pulse-duty ratio (modulation) of the pulse-width modulated output signal and which, with chronological delay, controls the push-pull stage. The push-pull stage has at least one upper and one lower power switch, and the microcontroller has three pulse-width modulation outputs. The actual pulse-width modulated output signal is delivered at the first output, the modulated signal plus a dead time is delivered at the second output and is supplied to the lower power switch as a drive signal, and the dead time by itself is delivered at the third output. The drive signal for the upper power switch is formed by the difference between the modulated signal and the inverted dead time is automatically decreased in the limit region of the modulation, i.e.