Modification of multiplier circuit gives divider in which negative output voltage is equal to 10 times ratio Ex/Ey. To use as square-rooter for Ex, connect pins 4 and 9 together and omit R1 and R2 at Ey input. Circuit uses multiplier block driving 741 current-to-voltage converter.-W. G. Jung, "IC 0p-Amp Cookbook," Howard W. Sams, Indianapolis, IN, 1974, p 257-258.