19.3. Conclusion

Try these first

1. 1.

   What does transconductance (g_m) measure?

   Hint

   Think about how the output current reacts to changes in input voltage.

2. 2.

   Define the base-emitter resistance in a BJT.

   Hint

   Consider what resistance affects the input current.

3. 3.

   What is the purpose of linearizing non-linear circuits?

   • To simplify circuit behavior
   • To increase complexity
   • To eliminate non-linear components

   Hint

   Think of how we make circuits easier to work with.

4. 4.

   True or False: The value of g_m is constant regardless of the operating point.

   • True
   • False

   Hint

   Consider how changing bias points can affect circuit parameters.

5. 5.

   For a given BJT with a collector current of 1 mA and operating at room temperature, design a small signal equivalent circuit. Determine g_m, r_π, and draw the equivalent circuit.

   Hint

   Use the equations discussed for g_m and r_π to summarize your parameters.

6. 6.

   Discuss the consequences of exceeding the linear operating region of a BJT in a circuit. Provide examples of distortion types that may arise.

   Hint

   Think about how non-linear effects might alter your signals.