Method and electronic device for the pulse-modulated actuation of a load in a vehicle, a period duration (T.sub.PM) of a frequency (f.sub.PM) of the pulse modulation being able to be divided into an integer number (N) of sections (T.sub.STEP), the duration of each of which corresponds to a multiple of a period duration (T.sub.OSC) of a clock signal, and the method having the steps of: calculating a frequency (f.sub.PM+1, f.sub.PM) or period duration (T.sub.PM+1, T.sub.PM) of a period of the pulse modulation on the basis of underlying frequency modulation, and determining the duration of a respective section (T.sub.STEP) of a period duration (T.sub.PM) of the pulse modulation using the calculated frequency (f.sub.PM+1, f.sub.PM) or period duration (T.sub.PM+1, T.sub.PM) of a period of the pulse modulation.

Method and electronic device for the pulse-modulated actuation of a load in a vehicle, a period duration (T.sub.PM) of a frequency (f.sub.PM) of the pulse modulation being able to be divided into an integer number (N) of sections (T.sub.STEP), the duration of each of which corresponds to a multiple of a period duration (T.sub.OSC) of a clock signal, and the method having the steps of: calculating a frequency (f.sub.PM+1, f.sub.PM) or period duration (T.sub.PM+1, T.sub.PM) of a period of the pulse modulation on the basis of underlying frequency modulation, and determining the duration of a respective section (T.sub.STEP) of a period duration (T.sub.PM) of the pulse modulation using the calculated frequency (f.sub.PM+1, f.sub.PM) or period duration (T.sub.PM+1, T.sub.PM) of a period of the pulse modulation.

A microwave generator includes a power supply, an output circuit, a feedback oscillator, a pulse controller, a signal combination circuit and a semiconductor amplifier. The power supply converts input voltage and input current into output voltage and output current. The output circuit generates a microwave signal to an output terminal of the microwave generator and a feedback signal according to the microwave signal. The feedback oscillator generates an oscillation signal according to the feedback signal. According to a reference signal, the pulse controller generates a pulse signal. According to the oscillation signal and pulse signal, the signal combination circuit generates a control signal. The semiconductor amplifier generates and adjusts an amplified signal according to the control signal. The output circuit generates the microwave signal according to the amplified signal. The output current is adjusted according to the amplified signal. Consequently, the input current and the input voltage are in phase.

A power supply device includes a pulse frequency modulation controller circuitry and a cycle controller circuitry. The pulse frequency modulation controller circuitry is configured to adjust a transiting speed of a first signal according to at least one control bit, and to compare the first signal with a first reference voltage to generate a second signal, and to generate a driving signal to a power converter circuit according to an output voltage, a second reference voltage, and the second signal, in which the power converter circuit is configured to generate the output voltage according to the driving signal. The cycle controller circuitry is configured to detect a frequency of the driving signal according to a clock signal having a predetermined frequency, in which the predetermined frequency is set based on a frequency range capable of being heard by humans.

A circuit includes a polar transmitter to generate a radio frequency output from amplitude and phase signal components. The polar transmitter includes an amplifier to combine amplitude and phase signal components. A processor is coupled to the polar transmitter to provide the amplitude and phase signal components. The processor includes: a digital modulation circuit to generate a modulated digital signal including in-phase and quadrature signal components and a correction circuit to calculate and apply a complex digital offset for local oscillator feedthrough of the amplifier. The complex digital offset includes an in-phase offset correction factor and a quadrature offset correction factor.

Methods, apparatus, systems and articles of manufacture are disclosed to adjust an operating mode of a power converter. An example apparatus includes a first transistor having a gate terminal, a first current terminal, and a second current terminal, the first current terminal to be coupled to a second transistor and an inductor of a power converter, a capacitor coupled to the second current terminal, a logic gate having a first logic gate input, a second logic gate input, and a logic gate output, the logic gate output coupled to the gate terminal, a comparator having a comparator input and a comparator output, the comparator input coupled to the capacitor and the second current terminal, a multiplexer coupled to the comparator output, a first flip-flop coupled to the multiplexer and the second logic gate input, and a second flip-flop coupled to the multiplexer and the first flip-flop.

Methods, apparatus, systems and articles of manufacture are disclosed to adjust an operating mode of a power converter. An example apparatus includes a first transistor having a gate terminal, a first current terminal, and a second current terminal, the first current terminal to be coupled to a second transistor and an inductor of a power converter, a capacitor coupled to the second current terminal, a logic gate having a first logic gate input, a second logic gate input, and a logic gate output, the logic gate output coupled to the gate terminal, a comparator having a comparator input and a comparator output, the comparator input coupled to the capacitor and the second current terminal, a multiplexer coupled to the comparator output, a first flip-flop coupled to the multiplexer and the second logic gate input, and a second flip-flop coupled to the multiplexer and the first flip-flop.

A switching power supply controller includes a pulse width modulator circuit. The pulse width modulator circuit includes a delay circuit and a delay control circuit coupled to the delay circuit. The delay control circuit includes an amplifier circuit. The amplifier circuit includes a first input terminal, a second input terminal, and an output terminal. The first input terminal is coupled to a first voltage reference terminal. The second input terminal is coupled to the second voltage reference terminal. The output terminal is coupled to a control terminal of the delay circuit.

A switching power supply controller includes a pulse width modulator circuit. The pulse width modulator circuit includes a delay circuit and a delay control circuit coupled to the delay circuit. The delay control circuit includes an amplifier circuit. The amplifier circuit includes a first input terminal, a second input terminal, and an output terminal. The first input terminal is coupled to a first voltage reference terminal. The second input terminal is coupled to the second voltage reference terminal. The output terminal is coupled to a control terminal of the delay circuit.

A radio frequency (RF) front end chip in a phased array antenna panel for transmitting a modulated circularly-polarized signal is disclosed. The RF front end chip includes an oscillator providing an angular speed modulation signal to a quadrature generation block, the quadrature generation block providing an in-phase signal and a quadrature signal based on the angular speed modulation signal, a first amplifier receiving the in-phase signal and a data signal, and providing a modulated horizontally-polarized signal, and a second amplifier receiving the quadrature signal and the data signal, and providing a modulated vertically-polarized signal, where a modulated circularly-polarized signal is generated based on the modulated horizontally-polarized signal and the modulated vertically-polarized signal. The angular speed modulation signal controls an angular speed of the modulated circularly-polarized signal. The data signal is encoded by the angular speed modulation signal.