Fremgangsmåte og anordning for digitalisering av et analogt inngangssignal som tillater nöyaktig digitalisering av analoge signaler

摘要

Method and apparatus for registering signals through an amplifying, sampling and digitising unit, which are suitable for continuously monitoring the stability of the gain applied in each of the successive cycles of sampling effected on the signals. …??With each cycle, a first digitising of an unamplified signal sample is carried out, followed by at least one second digitising of an amplified signal sample. Each gain actually applied is measured by taking the ratio between the values obtained respectively on termination of each second digitising and of the first digitising, and the gain of the amplifier is possibly corrected if the (or each) actual applied gain has drifted from its nominal value. …??Application to the digitising of seismic signals for example. …IMAGE…