Digital converter

Claim 1

APPARATUS FOR PROVIDING AN ANALOG INDICATION AS TO THE VALUE REPRESENTED BY A PLURALITY OF SIGNAL INDICATIONS, INCLUDING, A PLURALITY OF SWITCHING ARRANGEMENTS EACH BEING PROVIDED FOR A DIFFERENT DIGIT OF THE VALUE REPRESENTED BY THE SIGNAL INDICATIONS, EACH OF THE SWITCHING ARRAGEMENTS BEING CONSTRUCTED TO PROVIDE FIRST AND SECOND STATES OF OPERATION, A SOURCE OF FIRST AND SECOND ALTERNATING REFERENCE SIGNAL HAVING A PARTICULAR FREQUENCY AND HAVING AN OPPOSITE PHASE RELATIVE TO EACH OTHER, THE SOURCE BEING COUPLED TO EACH OF SAID SWITCHING ARRANGEMENTS TO PASS THE FIRST REFERENCE SIGNAL UPON THE OPERATION OF THE SWITCHING ARRANGEMENT IN THE FIRST STATE AND TO PASS THE SECOND REFERENCE SIGNAL UPON THE OPERATION OF THE SWITCHING ARRANGEMENT IN THE SECOND STATE, AN IMPEDANCE NETWORK HAVING A PLURALITY OF JUNCTIONS INDIVIDUALLY CONNECTED TO SAID SWITCHING ARRANGEMENTS FOR COMBINING THE REFERENCE SIGNALS PASSING FROM SAID SWITCHING ARRANGEMENTS, THE IMPEDANCE NETWORK INCLUDING A PLURALITY OF EQUAL IMPEDANCE MEANS CONNECTED IN SERIES RELATIONSHIP FOR WEIGHTING THE SIGNALS PASSING FROM SAID SWITCHING ARRANGEMENTS IN ACCORDANCE WITH THE DIGITAL SIGNIFICANCES OF THE SIGNAL INDICATIONS INTRODUCED TO THE SWITCHING ARRANGEMENTS, AND MEANS COUPLED TO SAID IMPEDANCE NETWORK FOR PROVIDING AN ALTERNATING SIGNAL HAVING THE PARTICULAR FREQUENCY AND HAVING AN INSTANTANEOUS MAGNITUDE AND PHASE DEPENDENT UPON THE WEIGHTED PATTERN OF THE FIRST AND SECOND REFERENCE SIGNALS PASSING THROUGH THE SWITCHING ARRANGEMENTS.