Analog-to-digital converter
First Claim
1. APPARATUS FOR CONVERTING A VOLTAGE FROM AN ANALOG SIGNAL SOURCE TO A DIGITAL REPRESENTATION THEREOF COMPRISING AN OSCILLATION GENERATOR, A VOLTAGE-CONTROLLED OSCILLATOR, MEANS FOR APPLYING THE OUTPUT FROM SAID SOURCE OF ANALOG SIGNALS TO SAID VOLTAGE-CONTROLLED OSCILLATOR TO CONTROL THE FREQUENCY OF OSCILLATIONS OF SAID VOLTAGE-CONTROLLED OSCILLATOR, MEANS FOR COMBINING THE OUTPUT OF SAID OSCILLATION GENERATOR AND SAID VOLTAGE-CONTROLLED OSCILLATOR TO DERIVE A RESULTANT SIGNAL HAVING A FREQUENCY EQUAL TO THE DIFFERENCE BETWEEN THE OUTPUT OF SAID TWO OSCILLATORS, A COUNTER, AND MEANS TO APPLY SAID RESULTED SIGNAL TO SAID COUNTER FOR A PREDETERMINED INTERVAL WHEREBY THE COUNT OUTPUT OF SAID COUNTER IS A DIGITAL INDICATION OF THE SIGNAL APPLIED TO SAID VOLTAGE-CONTROLLED OSCILLATOR FROM SAID SOURCE OF ANALOG SIGNALS, WHEREIN SAID MEANS TO APPLY SAID RESULTANT SIGNAL TO SAID COUNTER FOR A PREDETERMINED INTERVAL COMPRISES A TIME-BASE COUNTER, MEANS FOR APPLYING OUTPUT FROM SAID OSCILLATION GENERATOR TO SAID TIMEBASE COUNTER FOR A PREDETERMINED INTERVAL, MEANS FOR SELECTING AN OUTPUT FROM SAID TIME-BASE COUNTER, A GATE CIRCUIT HAVING ITS INPUT CONNECTED TO RECEIVE SAID RESULTANT SIGNAL FROM SAID MEANS FOR COMBINING OUTPUT AND ITS OUTPUT CONNECTED TO SAID COUNTER TO APPLY SAID RESULTANT SIGNAL THERETO, AND MEANS FOR APPLYING THE SELECTED OUTPUT OF SAID TIME-BASE COUNTER TO SAID GATE TO CLOSE IT TO PREVENT ANY FURTHER APPLICATION OF SAID RESULTANT SIGNAL TO SAID COUNTER.
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1 Claim
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1. APPARATUS FOR CONVERTING A VOLTAGE FROM AN ANALOG SIGNAL SOURCE TO A DIGITAL REPRESENTATION THEREOF COMPRISING AN OSCILLATION GENERATOR, A VOLTAGE-CONTROLLED OSCILLATOR, MEANS FOR APPLYING THE OUTPUT FROM SAID SOURCE OF ANALOG SIGNALS TO SAID VOLTAGE-CONTROLLED OSCILLATOR TO CONTROL THE FREQUENCY OF OSCILLATIONS OF SAID VOLTAGE-CONTROLLED OSCILLATOR, MEANS FOR COMBINING THE OUTPUT OF SAID OSCILLATION GENERATOR AND SAID VOLTAGE-CONTROLLED OSCILLATOR TO DERIVE A RESULTANT SIGNAL HAVING A FREQUENCY EQUAL TO THE DIFFERENCE BETWEEN THE OUTPUT OF SAID TWO OSCILLATORS, A COUNTER, AND MEANS TO APPLY SAID RESULTED SIGNAL TO SAID COUNTER FOR A PREDETERMINED INTERVAL WHEREBY THE COUNT OUTPUT OF SAID COUNTER IS A DIGITAL INDICATION OF THE SIGNAL APPLIED TO SAID VOLTAGE-CONTROLLED OSCILLATOR FROM SAID SOURCE OF ANALOG SIGNALS, WHEREIN SAID MEANS TO APPLY SAID RESULTANT SIGNAL TO SAID COUNTER FOR A PREDETERMINED INTERVAL COMPRISES A TIME-BASE COUNTER, MEANS FOR APPLYING OUTPUT FROM SAID OSCILLATION GENERATOR TO SAID TIMEBASE COUNTER FOR A PREDETERMINED INTERVAL, MEANS FOR SELECTING AN OUTPUT FROM SAID TIME-BASE COUNTER, A GATE CIRCUIT HAVING ITS INPUT CONNECTED TO RECEIVE SAID RESULTANT SIGNAL FROM SAID MEANS FOR COMBINING OUTPUT AND ITS OUTPUT CONNECTED TO SAID COUNTER TO APPLY SAID RESULTANT SIGNAL THERETO, AND MEANS FOR APPLYING THE SELECTED OUTPUT OF SAID TIME-BASE COUNTER TO SAID GATE TO CLOSE IT TO PREVENT ANY FURTHER APPLICATION OF SAID RESULTANT SIGNAL TO SAID COUNTER.
Specification
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Current AssigneeWilbur E Du Vall
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Original AssigneeWilbur E Du Vall
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InventorsDU VALL WILBUR E
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Application NumberUS04/209,718Time in Patent Office1,628 DaysField of SearchUS Class Current377/42CPC Class CodesH03M 1/00 Analogue/digital conversion...H03M 1/60 with intermediate conversio...
