A versatile programmable pattern generator

H. Sportel, H. W. Smit, C. A. Grimbergen

Research output: Contribution to journalComment/Letter to the editorAcademic

2 Citations (Scopus)


A versatile visual pattern generator is described that can be programmed by a microcomputer and is developed as a part of a portable visual evoked potential analysis system. The hardware is contained on one printed circuit board (3" X 10", 7.5 X 25.5 cm) residing in an interface connector of a microcomputer (Apple II). The generator produces signals for commercial 50 Hz video monitors; a calibration procedure based on a photocell measurement corrects for the non-linear voltage intensity characteristic of the phosphor of the video monitor
Original languageEnglish
Pages (from-to)125-131
JournalVision research
Issue number1
Publication statusPublished - 1987

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