Abstract: A power converter includes at least three booster modules for transferring power at least from an AC input side to a DC output side. Each booster module has a galvanically separated input and output, and can be operated as a power factor correction module. The input of a first booster module is connected to the input side, and its output is connected to the output side for providing a first output current to the output side. The input of a second booster module is connected to the input side, and its output is connected to a buffer capacitor for providing a second output current to the buffer capacitor. The input of a third booster module is connected to the buffer capacitor and its output is connected to the output side for providing a third output current to the output side.

Abstract: A power converter includes at least three booster modules for transferring power at least from an AC input side to a DC output side. Each booster module has a galvanically separated input and output, and can be operated as a power factor correction module. The input of a first booster module is connected to the input side, and its output is connected to the output side for providing a first output current to the output side. The input of a second booster module is connected to the input side, and its output is connected to a buffer capacitor for providing a second output current to the buffer capacitor. The input of a third booster module is connected to the buffer capacitor and its output is connected to the output side for providing a third output current to the output side.

Abstract: The apparatus embodies an inquiry unit with a radio frequency emitter and an answering unit (transponder) with a frequency divider for the frequency of the emitter of the inquiry unit. The divided frequency is modulated with the data inside the transponder as a carrier frequency in a phase modulator for the transmission of the answer and the so modulated signal is delivered to a demodulator of the inquiry unit. In the demodulator, the original data sequence is recovered from the received phase modulated signal with the help of an unmodulated reference signal derived from the frequency transmitted by the inquiry unit itself, using an algorithm implemented by means of a digital signal processor, independently of the phase relationship between the phase modulated signal and the internal reference and with negligible delay.