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Benefits of CMOS Scaling Quiz

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Questions and Answers

What is one of the benefits of CMOS scaling?

Decrease in transistor size allowing for higher transistor density (correct)

Increased transistor size

Higher power consumption

Reduced number of transistors per integrated circuit (IC)

Why does scaling contribute to a reduction in the cost per integrated circuit (IC)?

It takes advantage of the fixed manufacture cost of a wafer (correct)

It decreases the cost of manufacturing wafers

It increases the power supply voltage (Vdd)

It reduces the number of ICs manufactured per wafer

What happens to power usage with CMOS scaling?

It decreases as a result of an increase in power supply voltage (Vdd)

It increases due to a rise in capacitance (C)

It remains constant

It substantially lowers due to a decrease in capacitance and power supply voltage (correct)

How does CMOS scaling affect latency?

It decreases latency Signup and view all the answers

What would have been required to run the same number of 2 GHz transistors without the benefits of scaling?

$10(3 + 2)$ PC microprocessor chips from 1970 Signup and view all the answers

What is one of the consequences of CMOS scaling?

$3^2$ in power usage reduction Signup and view all the answers

What is GIDL in relation to leakage current in MOSFETs?

Leakage current that occurs in the OFF-state with gate-to-drain voltage equivalent to the supply voltage. Signup and view all the answers

What factor influences dynamic power consumption in transistors?

Gate oxide capacitance (Cox) and supply voltage (VDD) Signup and view all the answers

How does applying a positive voltage to the gate terminal affect an n-MOSFET?

Causes charge transfer into the channel, changing the logic state to '1'. Signup and view all the answers

What is the primary challenge when attempting to reduce both supply voltage (VDD) and OFF-state leakage current (Ioff)?

Dealing with the complexity of reducing both VDD and Ioff simultaneously. Signup and view all the answers

How does adjusting the source voltage impact power consumption in MOSFETs?

Increases the static power consumption. Signup and view all the answers

Why is it challenging to significantly reduce VT as MOSFETs get smaller?

VT reduction affects subthreshold hold slope. Signup and view all the answers