Precision time tracking line generator

Details Precision time tracking line generator Precision time tracking line generator

1981-06-19

1985-01-01

Smith, Jerry

Boots, shoes, and leggings

340720, 315370, 315387, G06F 314

Patent

active

044919255

ABSTRACT:
A display system line generator network having an error correction feedback loop which achieves high positional accuracy for both plan position indicators 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 position 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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patent: 3825796 (1974-07-01), Bello
patent: 3952297 (1976-04-01), Stauffer et al.
patent: 4115863 (1978-09-01), Brown
patent: 4228510 (1980-10-01), Johnson et al.
patent: 4287506 (1981-09-01), Richards

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