An apparatus includes a power converter circuit configured to generate a voltage level on a regulated power supply node using a clock signal, and a clock generation circuit configured to dither a frequency of the clock signal. To transition from a first frequency to a second frequency, the clock generation circuit is configured to change, during an initial transition period, the clock signal between the first and second frequencies such that a particular percentage of clock pulses have the second frequency. During one or more intermediate transition periods, the clock generation circuit is configured to change the clock signal between the first and second frequencies such that a percentage of clock pulses having the second frequency increases relative to a prior transition period. During a final transition period of the series, the clock generation circuit is configured to set the frequency of the clock signal to the second frequency.

A resonant parallel triple active bridge converter comprising a DC port configured to receive DC energy, an AC port configured to produce AC energy, and an AC line cycle energy storage port, coupled to both the DC port and the AC port, where the AC line cycle energy storage port comprises an energy storage device for storing energy during an energy conversion process.

A method of driving an electrical load includes coupling a power supply source to a power supply pin of a driver circuit, and coupling an electrical load to at least one output pin of the driver circuit. A driver sub-circuit of the driver circuit produces at least one driving signal for driving the electrical load. The at least one driving signal is provided to the electrical load via the at least one output pin. The at least one driving signal is modulated to supply the electrical load with a load current and to subsequently interrupt the load current. A compensation current pulse is sunk from the power supply pin, at a compensation circuit of the driver circuit, in response to the load current being interrupted.

A method for controlling an electronic switching unit for supplying electric power to an inductive power load, includes the following steps: activating an initial filter capacitor by connecting it between the electric power supply of the electronic unit and ground, and deactivating the other capacitors of the bank of filter capacitors; measuring the current flowing through this initial filter capacitor; if this current is above a predetermined nominal current threshold, activating an additional filter capacitor by connecting it between the electric power supply of the electronic unit and ground, in parallel with the initial filter capacitor.

A multi-level inverter having one or more banks, each bank containing a plurality of low voltage MOSFET transistors. A processor configured to switch the plurality of low voltage MOSFET transistors in each bank to switch at multiple times during each cycle.

Various embodiments relate to a current loop controller configured to control a boost converter, including: an amplifier configured to scale a measured current; a subtractor configured to subtract the scaled measured current from a desired current and to output an error signal; a controller including an integral part and a proportional part configured to produce a control signal based upon the difference signal and a gain value, wherein the gain value is based upon a measured value t.sub.ps, wherein t.sub.ps is the on-time plus the secondary time of the boost converter; and a switch signal generator configured to produce a gate signal based upon the control signal, wherein the gate signal controls the boost converter.

A DC filter device includes: a first filter device connection; a second filter device connection; a third filter device connection; a fourth filter device connection; a coil core; at least one first coil arranged on the coil core, the at least one first coil being connected in between the first filter device connection and the third filter device connection; at least one second coil arranged on the coil core, the at least one second coil being connected in between the second filter device connection and the fourth filter device connection; and a third coil arranged on the coil core, the third coil having a first coil connection and a second coil connection. The first coil connection and the second coil connection are connected to one another via a circuit device, which circuit device has a resistor.

An inductor includes a core made from a metallic magnetic material, a wire wound around the core, a pair of outer electrodes coupled to respective end portions of the wire, a shielding member arranged so as to cover a top face and three or more side faces of the core, and an insulating member arranged between the core and the shielding member and having thermal conductivity. The thickness of the shielding member is set by applying the electric resistivity and permeability of the shielding member and the frequency of noise desired to be shielded to an expression for determining the depth of a skin of skin effect. The thickness of the insulating member is set according to the breakdown voltage of the insulating member and the voltage with which insulation is desired to be ensured under a use environment of the inductor.

The disclosure relates to a transducer assembly like a microphone including a bias circuit having a charge pump and a filter circuit coupled to a transducer. The filter circuit includes a voltage-controlled resistor located between an output of the charge pump and the transducer, and a capacitor coupled to the voltage-controlled resistor opposite the charge pump, wherein the bias circuit is configured with a larger bandwidth for faster settling during transient operation than during steady-state operation.

A power converter and control circuit are provided. The control circuit has a power controller for turning on the power switch to maintain a desired output voltage and mode selection switch provides a mode selection signal. Depending on the magnitude of an input voltage of the power converter, in which the mode selection circuit compares the input voltage of the power converter with a reference voltage, a modulation controller is configured to turn on a modulation switch to activate the capacitor according to the mode selection signal.