Cyclic or periodic analog signal processing circuit

Claim 1

A cyclic analog signal processing circuit, intended for processing signals from a plurality n of linvars, each linvar supplying an induced signal V Mi proportional to the displacement to be measured and to the reference signal V Ri supplying the transducer, said circuit comprising: multiplexer means for successively transmitting the analog signals of the transducers, supplying the induced signal V Mi by a first output and the reference signal of the corresponding transducer by a second output; a memory for successively storing the digital values V Mi /V Ri representative of the respective displacements of the transducers, said memory being relooped on itself across an adder-subtracter circuit; a multiplier for multiplying the reference signal V Ri of the second output by the corresponding value V M /V R extracted from the memory and being converted in analog form in a digital-analog conversion circuit; control means comprising a differential comparator with a digital output for comparing the output of the multiplier with the induced signal V Mi of the first output and for supplying a binary control signal; and a circuit for the incrementation and decrementation control of the adder-subtracter circuit as a function of the state of said binary control signal.