Abstract
A flat-panel display control IC with 150-V drivers is realized in high-voltage analog/digital IC technology utilizing a low-cost p-n junction isolation process. An improved semiwell isolation structure that has an epitaxial layer of two different thicknesses is used. In order to achieve high-voltage push-pull operation, totem-pole-type output circuits are formed in the structure's thick, high-resistivity epitaxial area. A compact complementary transistor logic circuit is successfully integrated in the n-wells of the structure's thin epitaxial area to meet the high-speed requirement for control logic. A stacked circuit is used to reduce the standby power needs of the logic circuits.
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