Problem 1
A CMOS circuit operates with:
•
Load capacitance = 10 pF
•
Supply voltage = 5 V
•
Frequency = 1 MHz
Questions:
1. Calculate the energy consumed per clock cycle.
2. Determine the dynamic power dissipation of the circuit.
Problem 2
A CMOS inverter drives:
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Load capacitance = 20 pF
•
Supply voltage = 3.3 V
•
Frequency = 5 MHz
Questions:
1. Find the energy consumed per switching cycle.
2. Calculate the total dynamic power dissipation.
Problem 3
A CMOS logic gate has:
•
Load capacitance = 15 pF
•
Supply voltage = 1.8 V
•
Frequency = 10 MHz
Questions:
1. Compute the energy consumed in one charge–discharge cycle.
2. Determine the dynamic power dissipation.
3. If the frequency is doubled, what will be the new dynamic power?
Problem 4
A high-speed CMOS circuit operates with:
•
Load capacitance = 25 pF
•
Supply voltage = 2.5 V
•
Frequency = 20 MHz
Questions:
1. Calculate the energy per cycle.
2. Determine the dynamic power consumption.
3. If the supply voltage increases to 3 V, how does the power change?
Problem 5
A CMOS switching circuit has:
•
Load capacitance = 8 pF
•
Supply voltage = 1.2 V
•
Frequency = 50 MHz
Questions:
1. Find the energy consumed per clock cycle.
2. Calculate the dynamic power dissipation.
3. If capacitance increases to 12 pF, calculate the new dynamic power.
Problem 6
Given:
I=4 nA, V=0.9 V, T=330K
Questions:
1. Compute the leakage current.
2. Determine the static power dissipation.
3. Which parameter (voltage or temperature) has a stronger effect on leakage current?
Justify mathematically.