Device for processing and precorrecting an audiofrequency signal before its amplification in an amplification chain of an amplitude modulation transmitter.

摘要

The device makes it possible to perform precorrection of the audio frequency signals before their amplification in amplification chains of amplitude modulation transmitters comprising a determined number of width-modulated pulse generator modules connected in series with the amplifier. input of a filter. BR/ It comprises: BR/ - an analog-to-digital converter (8) of the audiofrequency signal to be transmitted in digital samples BR/ - an interpolation circuit (9) coupled at the output of the analog-digital converter for calculating respectively by linear interpolation the slope of variation and by a parabolic interpolation the value of the audiofrequency signal applied to the input of the analog-digital converter BR/ and storage means (10) coupled to the output of the interpolation circuit (9) for storing precorrection values of the audiofrequency signal samples addressable by the interpolation values of the audio frequency signal calculated by the interpolation circuit. BR/ Application: Realization of radio transmitters. / P