Conversion systems

Claim 1

A DIGITAL-TO-ANALOG CONVERSION DEVICE RESPONSIVE TO A SEQUENCE OF BINARY SIGNALS OF SELECTED BINARAY SIGNIFICANCE COMPRISING BINARY INPUT REGISTER MEANS FOR SEQUENTIALLY STORING BINARY BITS REPRESENTATIVE OF THE BINARY SIGNALS, FIRST ANALOG MEMORY MEANS FOR STORING A SUM DURING A FIRST PERIOD, SECOND ANALOG MEMORY MEANS FOR STORING A SUM DURING A SECOND PERIOD, COMBINING MEANS FOR RESPONDING TO SAID BINARY INPUT REGISTER AND TO SAID SECOND MEMORY MEANS FOR DEVELOPING A SUM OF ANALOG VOLTAGES SEQUENTIALLY EQUIVALENT TO ACCUMULATED ANALOG VOLTAGES REPRESENTATIVE OF SAID BINARY PULSES, FIRST SWITCHING MEANS FOR CLOSING DURING A FIRST PERIOD TO APPLY THE SUM DEVELOPED BY SAID COMBINING MEANS TO SAID FIRST MEMORY MEANS AND FOR OPENING DURING A SECOND PERIOD, SECOND SWITCHING MEANS FOR CLOSING DURING SAID SECOND PERIOD TO APPLY SAID SUM STORED IN SAID FIRST MEMORY MEANS TO SAID SECOND MEMORY MEANS AND FOR OPENING DURING SAID FIRST PERIOD, AND MEANS FOR CONTROLLING SAID FIRST AND SECOND SWITCHING MEANS TO COMBINE SAID SUM STORED IN SAID SECOND MEMORY MEANS AND SAID ANALOG VOLTAGE EQUIVALENT OF SAID BINARY INPUT PULSE FOR STORING THE SUM IN SAID FIRST MEMORY MEANS DURING SAID FIRST PERIOD, AND TO STORE THE SUM IN SAID SECOND MEMORY MEANS DURING SAID SECOND PERIOD.