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Cathode Ray Tube Decimal To Binary Converter

IP.com Disclosure Number: IPCOM000098770D
Original Publication Date: 1959-Dec-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 54K

Publishing Venue

IBM

Related People

Cochrane, HW: AUTHOR

Abstract

The decimal to binary converter utilizes a cathode ray tube which has nine vertical split targets along the large end of its envelope. The individual partial plates of the split targets are insulated from one another and are coded either 1, 2, 4 or 8. They connect through connections external to the envelope to the respective coded positions of a binary output register. Each stage of the decimal input register is connected to a digital to analog converter which produces a voltage output proportional to the value of the decimal digit. The output of the digital to analog converter is fed to the vertical deflection plate of the cathode ray tube to produce a downward deflection of the beam proportional to the decimal input digit.

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Cathode Ray Tube Decimal To Binary Converter

The decimal to binary converter utilizes a cathode ray tube which has nine vertical split targets along the large end of its envelope. The individual partial plates of the split targets are insulated from one another and are coded either 1, 2, 4 or 8. They connect through connections external to the envelope to the respective coded positions of a binary output register. Each stage of the decimal input register is connected to a digital to analog converter which produces a voltage output proportional to the value of the decimal digit. The output of the digital to analog converter is fed to the vertical deflection plate of the cathode ray tube to produce a downward deflection of the beam proportional to the decimal input digit. The beam itself is a relatively broad beam which covers,substantially all three of the partial plates of the split target and produces an output from the partial plates that it rests on.

For example, if a 7 is in the decimal input register, the beam is deflected to split target 7 to produce outputs from the 1, 2 and 4 coded partial plates, which are connected to the 1, 2 and 4 positions, respectively, of the binary output register, as representative of an output binary coded 7.

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