Transistor Amplifier Circuits Unit 1 – Introduction to Transistor Amplifiers
Exercise 2 – Multistage Amplifier Introduction
EXERCISE OBJECTIVE
When you have completed this exercise, you will have observed the operation of a two-stage
transistor amplifier circuit. You will view your results on an oscilloscope.
DISCUSSION
- Multistage transistor amplifiers utilize multiple transistors to produce voltage, current, or
power gains greater than those provided by a single transistor. - Multistage transistor amplifiers are identified by the method used to couple the signal
between amplifier stages. - Resistor-capacitor (RC) coupling uses a resistor to develop an output signal and a capacitor
to pass the signal from the output of one stage to another. - Transformer coupling uses a transformer to couple signals between the primary and the
secondary side of the coil. - In multistage amplifiers, capacitors are used to isolate the dc bias levels and simplify the
design. - All amplifiers are designed for a specific frequency range and an input/output signal
amplitude range. - An input signal that is too large or outside the frequency range of an amplifier will produce a
distorted output signal.