Electronic analogue multiplier with improved accuracy - has integrated input controlled by integration of reference voltage input and output generated over memory stage

摘要

An analogue multiplier is designed to improve accuracy and reduce the null point error. One of the input parameters (Vx) is integrated over a fixed interval determined by a control unit (St). The integration period is fixed by comparing the other input parameter (Uy) with the integrated value of the reference voltage input (VR). The output (z) is generated over a memory stage (S). The output (Va1) of the first integrator gives the multiplied value, Va1 = R2, C2, Ux. Uy./R1. C1. UR.