A method for actuating a controllable semiconductor switch by switching the switch on an off in phases in a controlled manner using a control signal is disclosed. The method includes starting a time measurement at the beginning of at least one phase of the phase-wise on-and-off switching procedure to ascertain a time duration, wherein the time measurement is continued until a phase following the at least one phase of the phase-wise on-and-off switching procedure begins. The ascertained time duration is compared with a specified maximal time duration. If the ascertained time duration exceeds the specified maximal time duration, the semiconductor switch is actuated such that the semiconductor switch is switched into a specified operating state.

A wireless charging transmitter device is includes a square wave signal generation circuit. The square wave signal generation circuit is formed by a first PMOS transistor switching circuit having a group of PMOS performance transistors and at least one PMOS functionality transistor, and a second NMOS transistor switching circuit having a group of NMOS performance transistors and at least one NMOS functionality transistor.

A wireless charging transmitter device is includes a square wave signal generation circuit. The square wave signal generation circuit is formed by a first PMOS transistor switching circuit having a group of PMOS performance transistors and at least one PMOS functionality transistor, and a second NMOS transistor switching circuit having a group of NMOS performance transistors and at least one NMOS functionality transistor.

A signal modulation apparatus includes: a reference signal generator that generates an analog reference signal by removing at least one harmonic signal component corresponding to at least one higher-order frequency from a triangular wave signal; a modulation signal generator that performs pulse width modulation for comparing the analog reference signal with an analog input signal, thereby to generate an analog modulation signal; a digital signal converter that converts the analog modulation signal to a digital output signal; and a nonlinear converter that performs nonlinear conversion corresponding to waveform conversion for converting the triangular wave signal to the analog reference signal, on the digital output signal or the analog input signal.

A circuit includes a first capacitance array formed by n nominally equal capacitive elements. A first electrode of each capacitive element is coupled, via respective switches to either a reference voltage or ground. A differential amplifier has a first input coupled to an output of a first capacitance array, a second input grounded, and an output generating a voltage ramp. A capacitive feedback circuit couples the output of the differential amplifier to the first input. A second capacitance array has an output coupled to the first input of the differential amplifier. The capacitive elements of the first capacitance array are organized in sets. The circuit operates by controllably coupling, set by set, second electrodes of the capacitive elements of the first capacitance array to the first input of the differential amplifier.

A method and device for synthesizing binary waveforms, wherein the initial analogue waveform is first converted into the segments with discrete levels, then each said discrete level section is in turn converted into a binary pulse of the same time duration as the given segment, and the average value of the generated pulse is proportional to the average value of the given initial waveform over the time duration of the given segment.