2.4. Channel-Length Modulation in CMOS Transistors

Try these first

1. 1.

   What is channel-length modulation?

   Hint

   Think about how voltage can affect the current paths in a transistor.

2. 2.

   What does λ represent in the context of MOSFETs?

   Hint

   It indicates the influence of the length of the conductive channel on the current.

3. 3.

   What is the effect of channel-length modulation on drain current?

   • It decreases the drain current
   • It has no effect
   • It increases the drain current
   • It stops the current

   Hint

   Consider how applied voltage changes the channel properties.

4. 4.

   True or False: Channel-length modulation is significant in short-channel devices.

   • True
   • False

   Hint

   Think about how channel length affects modulation effects.

5. 5.

   If a MOSFET has a channel length of 100 nm and a drain-source voltage of 5V, explain how channel-length modulation might influence its performance compared to a 500 nm long channel under the same conditions.

   Hint

   Consider the impact of length on the modulation factor.

6. 6.

   Demonstrate how ignoring channel-length modulation in a short-channel MOSFET could lead to circuit design failures.

   Hint

   Think about issues related to current predictions and material performance.