Patent ID: 8030915

Claim:
An integrated sensor (CR), comprising i) a voltage regulator (RT) suitable for delivering a regulated voltage on the basis of a primary power supply voltage (AP) referenced with respect to an electrical ground (ME), ii) a high-impedance sensitive element (ES) powered by said primary power supply voltage (AP) and suitable for delivering an electrical measurement quantity representative of a physical quantity, and iii) an amplification module (IR) powered by said regulated voltage and comprising a first input (+) suitable for receiving an analog reference dependent on said regulated voltage and a second input (−) receiving said electrical measurement quantity, and designed to deliver a first output voltage representative of said amplified measurement voltage, characterized in that said sensitive element (ES) and said voltage regulator (RT) are coupled electrically to a mechanical ground (MM), and in that it comprises a first differential amplifier (AD 1 ) powered by said primary power supply voltage (AP), referenced electrically with respect to said electrical ground (ME) and comprising a first input suitable for receiving said analog reference and a second input suitable for receiving said first output voltage, and designed to deliver a second output voltage representative of the first amplified output voltage and referenced with respect to said electrical ground (ME).