| 摘要 |
A linearity compensation apparatus for a multi-scanning monitor which has a magnetic deflection-type cathode ray tube includes a linearity coil to be connected in series with the deflection coil of a horizontal deflection system of the multi-scanning monitor. An electromagnet has a core connected to the linearity coil and a line coil wound on the core thereof. A current control circuit controls the amount of current flowing through the line coil of the electromagnet so as to correspond with the horizontal scanning frequency from an external display adapter, thereby varying the magnetic field strength of the electromagnet in order to vary automatically the relationship between the inductance and the current flowing through the linearity coil in accordance with the magnitude of the horizontal scanning frequency.
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