Electric Quantity Measuring Device Comprising An Analog-Digital Converter

Measuring electronic system comprising:

• a module to be measured configured to receive a stimulus signal (SS(t)) and supply an analog signal (SM(t)) to be measured,
• an input module to receive a first reference signal (SS(t)) and to supply a reference analog signal (SR(t));
• a measuring electronic device, comprising:
• an analog-digital conversion module configured to digitally convert time portions of an analog signal (SM(t)) to be measured alternated with time portions of a reference analog signal (SR(t)), for supplying respective first (DSM) and second pluralities (DR) of digital values;
• a digital processing module configured to:
• calculate a first mean amplitude (A1) of the first plurality of digital values and a second mean amplitude (A2) of the second plurality of digital values;
• the first and second mean amplitudes being proportional to a mean gain value of the analog-digital conversion module;
• supply a ratio value (VRT) of the first mean amplitude to the second mean amplitude, representative of a measured amplitude of the analog signal (SM(t)) to be measured,
• wherein said ratio value (VRT) is representative of an measured amplitude of a transfer function of said module to be measured.