Logic waveform display apparatus

Details Logic waveform display apparatus Logic waveform display apparatus

1983-03-23

1985-12-24

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340721, 340744, 340799, G06F 314

Patent

active

045609810

ABSTRACT:
Disclosed herein is an apparatus for displaying a logic waveform on a raster scan display device such as a CRT. A part of an input logic signal is delayed for forming a former bit, and the input logic signal acts as a present bit. A memory device stores a special pattern determined in accordance with results of logic operation of the present and former bits. An image dot of the pattern is addressed by the present and former bits and raster line position (number) information, and the output therefrom is applied as an intensity control signal to the display device. Since the memory device does not need FONT information, this invention needs very little software manipulation of data, and the capacity of the memory device is small. In addition, this invention can display glitches and graticule tick marks.

REFERENCES:
patent: 4107651 (1978-08-01), Martin
patent: 4250562 (1981-02-01), Haag et al.
patent: 4364036 (1982-12-01), Shimizu
patent: 4425643 (1984-01-01), Chapman et al.

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