Abstract
The circuit described here can provide the line and frame signals to drive anx, y display scope or oscilloscope at high resolution (1,000 lines) and repetition rate (50 Hz). Synchronizing circuitry at the input of the circuit allows the raster scan to be locked to an input signal, such as the square-wave output from a function generator, while another waveform from the same function genera-tor, the sine output, drives the z (intensity) input of the display scope. A stable spatial contrast display results. Spatial contrast depth is a direct function of z input modulation voltage. Spatial frequency is a direct function of the function generator frequency. The circuit can be used with a programmable function generator under computer control.
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This research was supported by the Naval Medical Research and Development Command under work unit number 6152N MR00001.001. The author’s contribution to this project was made during an Office of Naval Technology fellowship appointment at NAMRL. Trade names of materials and/or products of commercial or nongovernment organizations are cited as needed for precision. These citations do not constitute official endorsement or approval of the use of such commercial materials and/or products. Opinions and conclusions contained in this report are those of the author and do not necessarily reflect the views or the endorsement of the Department of the Navy, Department of Defense, or the U.S. Government.
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Cushman, W.B. A low-cost spatial contrast sensitivity display driver. Behavior Research Methods, Instruments, & Computers 24, 461–463 (1992). https://doi.org/10.3758/BF03203581
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DOI: https://doi.org/10.3758/BF03203581