Electronic circuit and method for the demodulation of useful signals from a carrier signal as well as a modem

摘要

The present invention relates to an electronic circuit (1) for the demodulation of useful signals from a carrier signal, wherein the carrier signal, with which has to be demodulated useful signal from a signal input (2) is supplied, comprising– a rectifier (3) for passing only of one polarity of the carrier signal,– at least one of the rectifier (3) of a downstream filter (4) for the suppression of at least one frequency range of the carrier signal,– a the filter (4) as conditioners network voltage, which is connected downstream of the workpiece (5), which is designed so that it adapts to the voltage of the useful signal and one of the two inputs (9.1, 9.2) of a comparator (9) to,an output (9.3) of the comparator as a function of a difference between the two inputs (9.1, 9.2) is switched on and off, and– a comparator (9) is connected in parallel feedback network (7), wherein the feedback network (7) a of the two inputs (9.1, 9.2) of the comparator (9) with the output (9.3) of the comparator (9.3) connects,characterized in thatthe feedback network (7) has a high pass characteristic.The present invention furthermore relates to a method for of useful signals from a carrier signal and a modem.