Electronic function generator

Claim 1

AN ELECTRONIC FUNCTION GENERATOR FOR GENERATING A FUNCTION OF AT LEAST ONE VARIABLE, INCLUDING A PLURALITY OF INPUT MEANS FOR ACCEPTING A PLURALITY OF INPUT SIGNALS, AT LEAST ONE OF SAID SIGNALS BEING A FUNCTION OF SAID VARIABLE; A POINT OF COMMON OUTPUT CONNECTION; A PLURALITY OF INTERPOLATING CONDUCTIVE MEANS, EACH OF SAID INTERPOLATING MEANS BEING CONNECTED AT ONE END TO A CORRESPONDING ONE OF SAID INPUT MEANS, AND ALL OF SAID INTERPOLATING MEANS BEING CONNECTED AT THEIR OTHER ENDS TO SAID POINT OF COMMON OUTPUT CONNECTION, AT LEAST ONE OF SAID INTERPOLATING MEANS HAVING A NONLINEAR RESISTIVE CHARACTERISTIC; CURRENT MEANS CONNECTED TO SAID POINT OF COMMON OUTPUT CONNECTION FOR SUPPLYING CURRENT TO AT LEAST ONE OF SAID INTERPOLATING MEANS AT ANY INSTANT, THE RESISTIVE VALUES OF SAID INTERPOLATING MEANS BEING ARRANGED TO CAUSE AT LEAST TWO OF SAID INTERPOLATING MEANS TO CONDUCT SIMULTANEOUSLY FOR PREDETERMINED VALUES OF SAID INPUT SIGNALS; AND CIRCUIT MEANS HAVING AN INPUT TERMINAL AND AN OUTPUT TERMINAL, SAID INPUT TERMINAL PRESENTING HIGH INPUT IMPEDANCE, SAID INPUT TERMINAL BEING CONNECTED TO RECEIVE AN ELECTRICAL SIGNAL FROM SAID POINT OF COMMON OUTPUT CONNECTION, SAID CIRCUIT MEANS PRODUCING AT SAID OUTPUT TERMINAL AN OUTPUT SIGNAL SUBSTANTIALLY LINEARLY DEPENDENT UPON SAID ELECTRICAL SIGNAL, SAID CIRCUIT MEANS CAUSING THE TOTAL AMOUNT OF CURRENT FLOWING THROUGH SAID POINT OF COMMON OUTPUT CONNECTION INTO SAID INTERPOLATING MEANS TO BE SUBSTANTIALLY PHYSICALLY UNINFLUENCED BY THE VALUES OF SAID INPUT SIGNALS.