Erfassungsgerät zur Digitalisierung von Hochdynamiksignalen.

摘要

Acquisition device making it possible to amplify, sample and digitise high dynamics signals.
After amplification in a fixed-gain amplifier (1), the signals are applied to a sampler (2) and then to an analog/digital converter to which a variable reference voltage VR is applied. The latter is available at the output of a multiplexer (6), to the inputs (X1-X5) of which are applied bypass voltages arising from subdivisions of a calibrated voltage VS. The choice of voltage is performed by a logic unit (7) depending on comparisons made by comparators (C1-C5) between the sampled voltages (Ve) and the bypass voltages. The digitised signals are represented by a digital word N(Ve) output by the converter 3 and a digital gain word G output by the logic unit.
Application to the digitising of seismic signals, for example.