Timebase circuit

Details Timebase circuit Timebase circuit

1985-05-31

1987-02-10

Groody, James J.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

H01J 2956

Patent

active

046425314

ABSTRACT:
A timebase circuit is described for providing a horizontal drive correction waveform to correct for pincushion distortion in which a parabolic correction current is derived by squaring a current proportional to the difference between the instantaneous and average values of the vertical ramp voltage. The correction current may be tilted by combination with a linear current proportional to the ramp voltage and may also be amplitude controlled.

REFERENCES:
patent: 3187218 (1965-06-01), E'Del
patent: 3725726 (1973-04-01), West
patent: 4063133 (1977-12-01), Nero et al.
patent: 4063134 (1977-12-01), Iida
patent: 4258298 (1981-03-01), Hilburn et al.

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