Browse Prior Art Database

Multilevel Data Display

IP.com Disclosure Number: IPCOM000079534D
Original Publication Date: 1973-Jul-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 53K

Publishing Venue

IBM

Related People

Fangmeier, LJ: AUTHOR [+2]

Abstract

Analog and digital data is simultaneously displayed by a cathode-ray oscilloscope (CRO).

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Multilevel Data Display

Analog and digital data is simultaneously displayed by a cathode-ray oscilloscope (CRO).

Binary signals representing analog data appearing at inputs BO-B7 are normally displayed as multivalued signals on a CRO screen, by summing the values of analog resistance connected to an operational amplifier input. Bivalued digital data may, in addition, be displayed on the same screen by offsetting the CRO Y-axis in accordance with selected Y-axis resistance values, and varying the CRO beam about the selected axis as a function of selected Delta Y resistance values.

A shift register is shifted once for each CRO X-sweep. For example, a Texas Instrument TTL 7496 shift register may be ring shifted around any number of adjacent outputs A-E selected at an input. Each shift register output gates a different Y-axis resistor and data input B0-B7. The E output permits all lines B0- B7 to be normally used. By selecting less than all shift register outputs, different data input combinations can be used, the unused digital positions of the shift register being set along with E.

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