Circuit for processing signals supplied by two sensors, which measure differentially a physical quantity

摘要

The invention relates to a circuit for processing signals (S1, S2) supplied by two sensors (6, 12; 8, 14) measuring differentially a physical quantity, and delivering a signal representing this quantity. This processing circuit essentially comprises a first means of counting (18) for counting within a measurement period an integral number N1 of periods T1 of the signal S1, the second means of counting (20) for counting within this measurement period an integral number N2 of periods T2 of the signal S2, and a logic circuit (22) for delivering a signal Sm representing the difference between the duration N1.T1 and the duration N2.T2, this signal being representative of the value of the physical quantity. Application especially to the measurement of an acceleration, a force, a pressure and a temperature. IMAGE