Junction transistors used to approximate non-linear functions

Claim 1

A CIRCUIT FOR APPROXIMATING NON-LINEAR FUNCTIONS COMPRISING A PLURALITY OF JUNCTION TRANSISTORS EACH HAVING AN EMITTER, A BASE AND A COLLECTOR, SAID TRANSISTORS BEING CONNECTED IN CASCADE SO THAT THE ENTIRE BASE CURRENT OF EACH TRANSISTOR BUT THE LAST IS DIRECTED TO THE EMITTER OF THE SUCCEEDING TRANSISTOR, MEANS FOR APPLYING A LINEARLY VARIABLE INPUT SIGNAL BETWEEN THE EMITTER OF THE FIRST AND BASE OF THE LAST TRANSISTOR OF THE CASCADE, IMPEDANCE MEANS OF DECREASING MAGNITUDE IN THE COLLECTOR CIRCUIT OF EACH OF SAID PLURALITY OF TRANSISTOS, A LOAD AND A SOURCE OF BIAS VOLTAGE IN THE COLLECTOR CIRCUIT OF SAID TRANSISTORS WHEREBY TRANSFERS OF CURRENT IN SAID PLURALITY OF SAID TRANSISTORS DUE TO LINEAR INCREASE IN MAGNITUDE OF SAID INPUT SIGNAL CAUSE A CURRENT THROUGH SAID LOAD APPROXIMATING A NON-LINEAR FUNCTION.