Picture height adjustment arrangement for a video display
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United States of America Patent
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-
Nov 23, 1993
Grant Date -
N/A
app pub date -
Jul 10, 1992
filing date -
Jul 10, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A first voltage-to-current converter responsive to a picture height adjustment control signal generates a first current in a capacitor for producing a trace portion of a sawtooth signal in the capacitor having a rate of change that is adjustable in accordance with an adjustment of the control signal. A second voltage-to-current converter responsive to the control signal generates a second current in a resistor for producing a third signal that is adjustable in accordance with the control signal. The sawtooth and third signals are coupled via a differential amplifier to a vertical deflection winding to produce a vertical deflection current in accordance with a difference between the sawtooth and third signals such that picture height adjustment does not affect vertical centering.
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