VLSI-2

Which model is used for scaling?

• constant electric scaling

• constant voltage scaling

• constant electric and voltage scaling

• constant current model

α is used for scaling

For constant voltage model,

• α = β

• α = 1

• α = 1/β

• β = 1

For constant electric field model,

• β = α

• α = 1

• α = 1/β

• β = 1

Gate area is scaled by

• α

• 1/α

• 1/α2

• α2

Parasitic capacitance is Scaled by

• β

• 1/β

• α

• 1/α

As the channel length is reduced in a MOS transistor, depletion region width must be

Regularity is the ratio of

• total transistors in the chip to total transistors that must be designed in detail

• total transistors that must be designed in detail to total transistors in chip

• total transistors to total components

• total charge storage components to charge dissipating components

Good design system has regularity in the range of

The third type of scaling model is

• λ-based model

• µm based model

• combined voltage and dimension model

• combined voltage and electric field model