Precision time tracking line generator

Details Precision time tracking line generator Precision time tracking line generator

G - Physics

09

G

375/21, 375/36

G09G 3/00 (2006.01) G09G 1/12 (2006.01)

Patent

CA 1185720

PRECISION TIME TRACKING LINE GENERATOR Abstract A display system line generator network having an error correction feedback loop which achieves high positional accuracy for both PPI and synthetic character and line data. Digital reference position and relative beam motion data are fed into separate D/A converters. The staircase effect at the output of the D/A that processes the relative beam motion data is eliminated in a constant current integrator. The output of the integrator is combined with the reference po- sition signal in a summing amplifier and the summed signal is fed to a deflection amplifier. A feedback circuit picks off the inputs to the summing amplifier and uses their comparison to synchronize time with beam position by compensating for errors due to component drift and aging.

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