A converter includes: a terminal that receives code-modulated power into which first alternating-current power has been code-modulated with a modulation code; and a circuit that converts the code-modulated power with a conversion code to generate second alternating-current power. The conversion code is based on the modulation code. A frequency of the second alternating-current power is lower than a frequency of the first alternating-current power.

An adaptive pulse positioning modulator including a sense circuit which provides a compensation signal indicative of output voltage error, a filter circuit having an input receiving the compensation signal and an output providing an adjust signal, a leading ramp circuit which provides a repetitive first leading edge ramp signal having a slope which is adjusted by the adjust signal, a comparator circuit which provides a first start trigger signal when the first leading edge ramp signal reaches the compensation signal and a first end trigger signal when a first trailing edge ramp signal reaches the compensation signal, a trailing ramp circuit which initiates ramping of the first trailing edge ramp signal when the first start trigger signal is provided, and a pulse control logic which asserts pulses on a PWM signal based on the trigger signals.

A device for the radio transmission of local measurements of physical values includes a microcontroller, a pulse generator connected thereto to generate at least one PPM signal, and an antenna for radio transmission of the PPM signal. The pulse generator includes an oscillator and a power amplifier with an input connected to the oscillator to emit the PPM signal on the basis of a selective activation of the oscillator and of the power amplifier by respective driving signals with rectangular pulses generated by the microcontroller. These driving signals include, for each PPM pulse to be generated, a respective rectangular pulse, so that the oscillator is activated prior to, and deactivated after, the respective instants of activation and deactivation of the power amplifier. The rectangular pulse supplied to the power amplifier is low-pass filtered to slow the deactivation of the amplifier while the oscillator remains active by the respective rectangular pulse.

A device for the radio transmission of local measurements of physical values includes a microcontroller, a pulse generator connected thereto to generate at least one PPM signal, and an antenna for radio transmission of the PPM signal. The pulse generator includes an oscillator and a power amplifier with an input connected to the oscillator to emit the PPM signal on the basis of a selective activation of the oscillator and of the power amplifier by respective driving signals with rectangular pulses generated by the microcontroller. These driving signals include, for each PPM pulse to be generated, a respective rectangular pulse, so that the oscillator is activated prior to, and deactivated after, the respective instants of activation and deactivation of the power amplifier. The rectangular pulse supplied to the power amplifier is low-pass filtered to slow the deactivation of the amplifier while the oscillator remains active by the respective rectangular pulse.