Circuit for detection and measurement of a physical quantity with the aid of an impedance which is variable as a function of the quantity to be measured.

摘要

a. Circuit for detection and measurement of a physical quantity. b. Characterised in that it comprises an oscillator 1, a detector 2 formed by a bridge circuit Z10, R10; Z20, R20; Z30, R30; Z40, R40 one of whose branches contains the impedance of the sensor and whose vertices are linked to two peak detectors A20, D20, A30, D30 forming two output branches, as well as a linearisation circuit 3 linked to the two output branches of the detector 3. c. The invention especially relates to metrology. <IMAGE>