Browse Prior Art Database

Direct Digital To Analog Values Storage

IP.com Disclosure Number: IPCOM000094328D
Original Publication Date: 1966-Sep-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Beck, JW: AUTHOR

Abstract

When a process is being controlled by a central computer, analog voltage levels can be set by the central computer without resorting to high-precision digital-to-analog converters.

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Direct Digital To Analog Values Storage

When a process is being controlled by a central computer, analog voltage levels can be set by the central computer without resorting to high-precision digital-to-analog converters.

Computer 10 controls a process having a number of measurable parameters. These parameters are represented by analog signals. Input multiplexor 12, operated by scanning device 14, samples a single output parameter appearing on line 15. Multiplexor 12 passes the signal on to analog-to-digital converter ADC 18, having an output register 20. A corresponding digital signal is passed from ADC 18 to computer 10 and to digital compare circuitry 22.

Computer 10 searches its memory for the stored digital equivalent of the desired analog level for the parameter sensed and provides that digital value to circuitry 22 through output register 24. A comparison of the two digital values is made by circuitry 22. Should a difference exist, correction signal E is generated by circuitry 22. Output multiplexor 26, operated by scanner 14, then feeds signal E to a selected analog storage circuit 16 which, in turn, sets the process parameter at a desired level.

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