69.3.1. Bias Resistor Calculations

Try these first

1. 1.

   What is the role of bias resistors in a CE amplifier?

   Hint

   Think about what prevents fluctuation in transistor performance.

2. 2.

   Define beta (β) in the context of transistors.

   Hint

   Consider the relationship between input and output currents.

3. 3.

   What does the beta (β) in a transistor signify?

   • The voltage gain
   • The current gain
   • The power factor

   Hint

   It relates to current, not voltage.

4. 4.

   Is an increase in early voltage always beneficial?

   • True
   • False

   Hint

   Think about how early voltage affects output characteristics.

5. 5.

   Given a CE amplifier with an early voltage of 150V, if the beta is expected to be 250, calculate the required resistor values to achieve a stable operating point at 6V DC output voltage when changes in beta vary the current gain to 200.

   Hint

   Use previous examples to guide your calculations.

6. 6.

   Discuss the potential effects on amplifier performance if feedback resistors are drastically increased beyond recommended values. What calculations would ensure stable operation?

   Hint

   Consider how feedback affects amplification and stability.