FIELD: technological processes.
SUBSTANCE: invention relates to the field of machine building, in particular to equipment of precision amplification of sensor signals in circuit of equipment control with numerical control. Set objective is achieved by the fact that the following components are introduced into device - resistors R1, R2, R3, R4, the second operational amplifier, comparator, keys S1, S2, S3 and analogue-digital converter, making it possible to eliminate mode of self-excitation of the first operational amplifier.
EFFECT: using device in systems of machine building equipment control will make it possible to provide for high accuracy of processed surfaces on equipment with numerical control, due to increased accuracy in compensation of shift and zero drift at the outlet of the first operational amplifier and increased interval between stages of self-correction.
1 dwg
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