47.4. Next Circuit with Practical Source Resistance

Try these first

1. 1.

   What is the function of a common collector amplifier?

   Hint

   Think about why amplifiers are used in signal processing.

2. 2.

   What should the voltage gain value be for an ideal common collector amplifier?

   Hint

   Recall the goal of such configurations.

3. 3.

   What configuration provides high input and low output impedance?

   • Common Emmitter
   • Common Collector
   • Common Drain

   Hint

   Think about what 'common collector' stands for.

4. 4.

   True or False: The voltage gain for a common collector amplifier should be significantly greater than 1.

   • True
   • False

   Hint

   Reflect on optimal performance of this amplifier type.

5. 5.

   Given a common collector amplifier with a collector current of 0.5 mA, with a source resistance of 100 kΩ, calculate the voltage drop across the source resistance and the resulting base voltage.

   Hint

   Use Ohm's law to find voltage drop.

6. 6.

   A common collector amplifier has an upper cutoff frequency of 30 MHz with ideal source resistance. If a source resistance of 100 kΩ is introduced, analyze how this will affect the cutoff frequency.

   Hint

   Think about how resistance interacts with capacitance.