Circuit for increasing the dynamic for a channel transmitting a broadband analogue impulse signal and its application to an optical transmission system of several impulse signals.

摘要

The circuit comprises, following an amplifier (1), a direct path (Vo1) and delayed and attentuated paths. The second path (Vo2) comprises an attenuator (2) with attenuation K1 and a delay line (LRe1) of duration T1 equal to the duration of the fast rising edge of the impulse signal. Each succeeding path (Vo3) is linked to the output of the preceding path and also includes an attenuator (3) and a delay line (LRe2) of duration T1. A multiplexer (4) controlled by a circuit (5) time-multiplexes the rising edges of the impulse signal with attenuations K1, K1K2 etc. The invention applies in particular to the transmission of several impulse signals with large dynamic. <IMAGE>