IC Layout

Integrated Circuit Layout Design

Challen Yee AMS Layout Engineer

ICL 23.23 Rant on DACs

Many DAC layouts that have become legacy is that they are not drawn to perform in a way that enhances the necessary step characteristics intended by the circuit design.

Like every improperly drawn layout, they can meet the demands of LVS but do not meet the criteria for enhancing the proportional output characteristics that defy the manufacturing process.

In this vein of thought, it’s one of the most interesting discussions involving common central theory. Therefore, when I see a DAC drawn like common logic, it bothers me because the first DACs I ever had the privilege of drawing were for high performance video color DACS.

While it is true that there can be a wide margin for error for any given circuit application (and I’ve written this before somewhere) the reusability of any given layout is in the best interest of the layout designer, the company he or she is employed, and ultimately for the advancement of the industry and in its part in the progress of humankind.

And we thought it was just to get home on time the next time we have to redraw it.

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CKY

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