7.4. Analysis of CMOS Digital Circuits

Try these first

1. 1.

   Define propagation delay.

   Hint

   Think about how long it takes for an action to result in a reaction.

2. 2.

   What does static power mainly depend on?

   Hint

   Reflect on what occurs when the circuit is not in operation.

3. 3.

   What is the primary component measured by propagation delay?

   • Time
   • Voltage
   • Current

   Hint

   Remember, it's related to how long it takes for a signal to propagate through a circuit.

4. 4.

   True or False: Static power is always higher than dynamic power in CMOS circuits.

   • True
   • False

   Hint

   Consider when does power actually flow in a CMOS circuit.

5. 5.

   Consider a CMOS circuit with three stages of logic gates, each with a identified propagation delay of 1.2 ns, 0.8 ns, and 1.5 ns. Calculate the total propagation delay for the circuit.

   Hint

   Simply add the delays from each gate.

6. 6.

   A CMOS circuit operates with a supply voltage of 1.8V and a load capacitance of 15nF. If it switches at 1 MHz with a switching activity factor of 0.2, calculate the dynamic power consumption.

   Hint

   Remember to convert the units correctly.