Control line driver employing opposite-conductivity-type transistors providing either of two potentials to output terminal

Claim 1

A CONTROL LINE DRIVER COMPRISING AN INPUT TERMINAL AND AN OUTPUT TERMINAL, POWER SUPPLY MEANS FOR FURNISHING FIRST AND SECOND VOLTAGES OF DIFFERENT VALUES, FIRST, SECOND, THIRD AND FOURTH TRANSISTORS, MEANS CONNECTING SAID FIRST AND SECOND TRANSISTORS IN SERIES TO PROVIDE A LOW RESISTANCE PATH BETWEEN SAID FIRST VOLTAGE AND SAID OUTPUT TERMINAL WHEN SAID FIRST VOLTAGE AND SAID OUTPUT CONDUCTIVE STATE, MEANS CONNECTING SAID THIRD TRANSISTOR TO PROVIDE A LOW RESISTANCE PATH BETWEEN SAID SECOND VOLTAGE AND SAID OUTPUT TERMINAL WHEN SAID THIRD TRANSISTOR IS IN A CONDUCTIVE STATE, MEANS NORMALLY BIASING SAID SECOND TRANSISTOR INTO A NON-CONDUCTIVE STATE, MEANS BIASING SAID FIRST TRANSISTOR INTO A CONDUCTIVE STATE, SAID FIRST TRANSISTOR PROVIDING A HIGH RESISTANCE PATH WHEN IN A NONCONDUCTIVE STATE, MEANS CONNECTING SAID FOURTH TRANSISTOR TO SAID INPUT TERMINAL FOR BIASING SAID FOURTH TRANSISTOR INTO A CONDUCTIVE STATE WHEN A PREDETERMINED PULSE SIGNAL IS APPLIED TO SAID INPUT TERMINAL, AND MEANS ASSOCIATED WITH SAID FOURTH TRANSISTOR FOR CAUSING CONDUCTION OF SAID SECOND TRANSISTOR AND NON-CONDUCTION OF SAID THIRD TRANSISTOR WHEN SAID FOURTH TRANSISTOR IS CONDUCTIVE TO PROVIDE SAID LOW RESISTIVE PATH BETWEEN SAID FIRST VOLTAGE AND SAID OUTPUT TERMINAL.