Layout view of a simple CMOS Operational Amplifier (inputs are to the left and the compensation capacitor is to the right). The metal layer is coloured blue, green and brown are N- and P-doped Si, the polysilicon is red and vias are crosses.
Engineer using an early IC-designing workstation to analyze a section of a circuit design cut on rubylith, circa 1979
Major steps in the IC design flow
Physical design steps within the digital design flow

Document containing all the requirements to a certain product.

- Product requirements document

It is much shorter and more general than a product requirements document or a marketing requirements document, which outline the specific product plan and marketing plan respectively.

- Vision document

This phase should result in a product requirements document.

- Integrated circuit design
Layout view of a simple CMOS Operational Amplifier (inputs are to the left and the compensation capacitor is to the right). The metal layer is coloured blue, green and brown are N- and P-doped Si, the polysilicon is red and vias are crosses.

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