Digital to analog computer converter

Claim 1

A CONVERTER FOR CONVERTING A DIGITAL WORD INCLUDING CLOCK PULSES AND INFORMATION BITS INTO AN ANALOG SIGNAL COMPRISING A SOURCE OF REFERENCE VOLTAGE, A REFERENCE VOLTAGE CAPACITOR AND AN OPERATIONAL AMPLIFIER IN PARALLEL, SWITCH MEANS OPERABLE TO CONNECT THE SOURCE OF REFERENCE VOLTAGE TO SAID REFERENCE VOLTAGE CAPACITOR TO CHARGE SAID REFERENCE VOLTAGE CAPACITOR TO A VOLTAGE REPRESENTATIVE OF THE MOST SIGNIFICANT DIGIT OF A DIGITAL WORD, CAPACITOR AND SWITCH MEANS OPERATIVELY ASSOCIATED WITH SAID REFERENCE VOLTAGE CAPACITOR TO REDUCE THE REFERENCE VOLTAGE ON SAID REFERENCE VOLTAGE CAPACITOR A PREDETERMINED AMOUNT IN RESPONSE TO EACH CLOCK PULSE IN A SERIALLY RECEIVED DIGITAL WORD, A SAMPLING SWITCH AND CAPACITOR OPERABLY ASSOCIATED WITH SAID REFERENCE VOLTAGE CAPACITOR TO SAMPLE THE VOLTAGE PRESENT ON THE REFERENCE VOLTAGE CAPACITOR BETWEEN CLOCK PULSES ONLY IN RESPONSE TO AN INFORMATION BIT IN THE DIGITAL WORD, STORAGE MEANS INCLUDING A STORAGE CAPACITOR AND AN OPERATIONAL AMPLIFIER OPERABLY ASSOCIATED WITH SAID SAMPLING SWITCH AND CAPACITOR TO RECEIVER, COMBINE AND STORE ONLY VOLTAGES PROPORTIONAL TO EACH VOLTAGE SAMPLED DURING A DIGITAL WORD, AND SWITCH MEANS OPERABLE TO PROVIDE AN ANALOG OUTPUT FROM SAID STORAGE MEANS AT THE END OF EACH DIGITAL WORD.