Device with high linearity of the limitation of a characteristic of a signal, and the use of the device in a radar reception chain.

摘要

The present invention relates to a device with high linearity of the limitation of a characteristic of a signal to a threshold value m, x, and in particular of the amplitude of a radar signal in a reception chain with high linearity. & br / the device according to the invention is composed of a limiter (23), the limitation threshold s 1 i m is switched over to two possible values sb and sb are chosen respectively upper and lower than the sm a x, and means (21, 22) which controls the switching of the limitation threshold s 1 i m on the one or other of the preceding values according to a measurement representative of a characteristic of the signal, such that the amplitude, delivered by the measurement means (20), is greater than or less than the threshold value sm to x. & br / such a device has a great interest in a high linearity radar performing an analog - digital coding of the radar signal because it protects the encoder used in the saturation with a minimum amount of degradation of performance of the dynamic range and linearity.