Switching network

Claim 1

IN COMBINATION: A COORDINATE ARRAY OF TRANSISTORS, OF GIVEN CONDUCTIVITY TYPE, ARRANGED IN COLUMNS AND ROWS; MEANS PROVIDING A PLURALITY OF INPUT SIGNALS; SOURCE MEANS PROVIDING TWO OPERATING VOLTAGES OF DIFFERENT VALUE; A ROW SELECTION ARRAY OF TRANSISTORS OF ONE CONDUCTIVITY TYPE CONNECTED TO RECEIVE THE OPERATING VOLTAGE OF ONE OF SAID VALUES FOR APPLYING A VOLTAGE TO THE BASE ELECTRODES OF ONE ROW OF THE TRANSISTORS IN THE COORDINATE ARRAY IN RESPONSE TO A PARTICULAR COMBINATION OF SAID INPUT SIGNALS APPLIED TO THE TRANSISTORS OF THE ROW SELECTION ARRAY; AND A COLUMN SELECTION ARRAY OF TRANSISTORS OF OPPOSITE CONDUCTIVITY TYPE OF THE TRANSISTORS OF THE ROW SELECTION ARRAY CONNECTED TO RECEIVE THE OPERATING VOLTAGE OF SAID OTHER VALUE FOR APPLYING A VOLTAGE TO THE EMITTER ELECTRODES OF ONE COLUMN OF THE TRANSISTORS IN THE COORDINATE ARRAY IN RESPONSE TO A PARTICULAR COMBINATION OF SAID INPUT SIGNALS APPLIED TO THE TRANSISTORS OF THE COLUMN SELECTION ARRAY, WHICH VOLTAGE IS IN THE FORWARD DIRECTION RELATIVE THE VOLTAGE APPLIED TO THE BASE ELECTRODE OF THE TRANSISTOR IN THE COORDINATE ARRAY WHICH IS COMMON TO THE ROW AND COLUMN THEREOF SELECTED BY THE ROW AND COLUMN ARRAYS, FOR PLACING SAID TRANSISTOR IN CONDITION TO CONDUCT.