Patent ID: 8970225
Filing Date: 2015-03-03
Classification: G01D,G01R

Abstract:
1. A circuit for exciting at least one direct current (DC) sensor, the circuit comprising: a digital regulation controller connected to a main system and to a regulation loop; wherein the main system comprises a digital-to-analog converter (DAC) connected to the sensor via a non-inverted amplified path and via an inverted amplified path in order to send sensor excitation signals including a DC component in differential mode; wherein the regulation loop includes an analog-to-digital converter (ADC) connected to the amplified paths; a monitoring system that is connected to the digital regulation controller in parallel with the analog-to-digital (ADC) converter in order to send signals as a function of an alternating current (AC) component of the signals taken from the amplified paths; and wherein the digital regulation controller is arranged to inject a sinewave in common mode into the excitation signals and to analyze signals output by the monitoring system and signals output by the ADC.