A 400-MHz DA converter with a 4-bit color map for 2000-line display

A video digital-to-analog (DA) converter with a color map is discussed that is monolithic, bipolar, and achieves ultrahigh speed. When the chip is addressed with 4-bit video data, 256-step color-map data can be used in an extremely high-definition 2000-pixel*2000-pixel display. A combination of two emitter-coupled logic (ECL) RAMs and a data-multiplex DA converter is used. The conversion rate is 400 MHz, the settling time of the DA converter is 2 ns, the rise and fall times are both 0.8 ns, and the power consumption is 1.3 W.<
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