Transistor Feedback Circuits Unit 4 – Multistage Amplifier Feedback
Exercise 4 – Series-Shunt Output Impedance
EXERCISE OBJECTIVE
When you have completed this exercise, you will be able to measure the output impedance of a
series-shunt feedback amplifier by using a variable load connected to the circuit output. You will
verify your results with an oscilloscope and a multimeter.
DISCUSSION
- Output impedance of a series-shunt amplifier equals the shunt resistor divided by the
transistor beta in parallel with the collector resistor - Zo = Rsh/β Rc