Layout of Analog CMOS – part 3

Learn about passive components – resistor and capacitor

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Layout of Analog CMOS – Part 2

Learn about basic cell layout .

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Circuit Layout Techniques and Tips

Show you how to deal with analog and digital circuits on the same chip.

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Analog Layout and Grounding Techniques

When low-level or high-precision circuitry is being designed, a lot of care is usually given to the details of the circuit schematic and how the signal runs are routed. But the way the circuitry grounds are handled is as important
as how the signal runs are handled. A small grounding error in just one location could potentially create longterm
headaches once the board is powered up. Careful routing and decoupling of the power busses is also very important…

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Matching of Resistors and Capacitors

The mismatch between any two devices is expressed as a deviation of the measured device ratio from the intended device ratio …

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An Introduction to Matching and Layout

Two devices with the same physical layout never have quite the same electrical properties …

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Analog Layout Consideration

In doing layouts for digital circuits, the speed and the area are the two most important issues. In contrast, in doing layout for analog circuits, everything should be considered simultaneously. In addition to the speed and the area, other equally critical considerations should be taken into account.

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The Common Question in Analog Layout

Why need match

Why need same length

Why need unit width to replicate 

Why need dummy

Why need shielding 

Why care parasitic

Why need seal ring 

Why top metal is immune to antenna effect

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