Hybrid digital-analog nonlinear function generator

Claim 1

AN ELECTRONIC CIRCUIT FOR GENERATING PULSE-WIDTH OUTPUT SIGNALS MODULATED IN ACCORDANCE WITH A NONLINEAR FUNCTION COMPRISING: (A) A HIGH FREQUENCY PULSE SOURCE; (B) TWO PULSE COUNTERS, SAID TWO PULSE COUNTERS ACTUATED BY THE HIGH FREQUENCY PULSE SOURCE TO RUN IN SYNCHRONISM IN THE ABSENCE OF ANY CONTROL ACTION; (C) A PULSE GATE CIRCUIT FOR RENDERING ONE OF SAID PULSE COUNTERS RESPONSIVE TO AN ANALOG INPUT SIGNAL TO THEREBY PROVIDE A CONTROL ACTION, SAID CONTROL ACTION EFFECTING A PHASE DISPLACEMENT BETWEEN OUTPUTS OF THE TWO PULSE COUNTERS TO DEVELOP A PULSE-WIDTH CONTROL SIGNAL; (D) VARIABLE IMPEDANCE MEANS FOR VARYING THE AMPLITUDE OF THE SAID PULSE-WIDTH CONTROL SIGNAL; AND (E) LOGIC MEANS RESPONSIVE TO ONE OF SAID COUNTERS TO SWITCH SAID VARIABLE IMPEDANCE MEANS IN ACCORDANCE WITH THE DESIRED NONLINEAR FUNCTION OF THE INPUT VARIABLE.