Electronic circuit and method for recovering desired signals from carrier signals by demodulation as well as a modem

摘要

An electronic circuit comprising a rectifier which passes only one polarity of a carrier signal; at least one filter, subsequent to the rectifier, for the suppression of at least one frequency range of the carrier signal; a voltage matching network, subsequent to the filter, which is embodied so that it matches the voltage of the desired signal, and leads to one of the two inputs of a comparator, wherein an output of the comparator is switched, depending on the difference between the two inputs, and a feedback network connected in parallel with the comparator, wherein the feedback network connects one of the two inputs of the comparator with the output of the comparator, the feedback network comprises a high-pass characteristic. The invention furthermore comprises a method for the recovering of desired signals from a carrier signal by demodulation and a modem.

主权项

1. An electronic circuit for recovering a desired signal from a carrier signal by demodulation, wherein the to be demodulated carrier signal along with the desired signal, is inputted by a signal input, said circuit comprising:
a rectifier which passes only one polarity of the carrier signal; at least one filter, subsequent to said rectifier, for the suppression of at least one frequency range of the carrier signal; a comparator comprising two inputs; a voltage matching network, subsequent to said filter, which is embodied so that it matches the voltage of the desired signal, and is connected to one of the two inputs of said comparator; wherein an output of said comparator is switched, depending on the difference between said two inputs; and a feedback network connected in parallel with said comparator, wherein: said feedback network connects the other of said two inputs of said comparator with said output of said comparator, said feedback network comprises high-pass characteristic.