21.4. Indian Institute of Technology, Kharagpur

Try these first

1. 1.

   What is the concept of linearization in electronics?

   Hint

   Think about behavior near a certain point.

2. 2.

   What does the term gm stand for?

   Hint

   It's a measure of control in a transistor.

3. 3.

   What does small signal model represent?

   • A static model of the circuit
   • A model focusing on linear variations
   • An entire circuit model including DC

   Hint

   Think about signals that are not constant.

4. 4.

   Is transconductance a measure of a MOSFET's efficiency?

   • True
   • False

   Hint

   What does gm express?

5. 5.

   You have a MOSFET with ID = 1 mA and Vgs = 2V. Calculate gm if Vth is known to be 1V. Analyze if this improvement in gm can amplify a signal.

   Hint

   Look for the role of Vth when calculating gm.

6. 6.

   If a circuit containing a MOSFET has a derived small signal gain of -10 and the input voltage is 10mV, what is the output?

   Hint

   Negative gain indicates an inversion; be careful with signs.