Abstract: The invention relates to an alternating current switch device for the optional closure and opening of at least one electrically conducting connection, wherein this alternating current switch device has at least two parallel connected branches (10, 12, 14) for a flow of current in each case and wherein multiple switches (16, 18, 20) are provided that are each assigned to one of the branches (10, 12, 14), wherein respective electrically conducting connections can be closed and opened by means of these switches (16, 18, 20), allowing a current flow through the respective branch (10 or 12 or 14) to which this respective switch (16, 18, 20) is assigned, wherein a diagnostic device (22) is provided for determining the operability of the alternating current switch device (1).

Abstract: A circuit arrangement for aircraft engine regulators, for providing or generating a bipolar output direct current signal as a function of at least one pulse-width modulated input signal is disclosed. Said circuit arrangement comprises at least two driver stages, each driver stage being controllable by a pulse-width modulated input signal and wired up to preferably one step-down actuator stage in such a way that, for the control of a first driver stage, a first switching device of a step-down actuator stage controls a low-pass filter device of the step-down actuator stage, and for the control of a second driver stage, a second switching device of the step-down actuator stage controls the low-pass filter device of the step-down actuator stage.

Abstract: A circuit arrangement for aircraft engine regulators, for providing or generating a bipolar output direct current signal as a function of at least one pulse-width modulated input signal is disclosed. Said circuit arrangement comprises at least two driver stages, each driver stage being controllable by a pulse-width modulated input signal and wired up to preferably one step-down actuator stage in such a way that, for the control of a first driver stage, a first switching device of a step-down actuator stage controls a low-pass filter device of the step-down actuator stage, and for the control of a second driver stage, a second switching device of the step-down actuator stage controls the low-pass filter device of the step-down actuator stage.