Transistor Feedback Circuits Unit 4 – Multistage Amplifier Feedback
Shown is a series-shunt feedback circuit.
Resistor Ref provides series feedback to the input stage.
Resistor Rsh provides shunt feedback to the output stage.
In a series-shunt multistage amplifier, the feedback ratio of Rsh/Ref determines the voltage gain
(Av = Rsh/Ref).
NEW TERMS AND WORDS
shunt-series - a multistage amplifier in which the input stage has shunt feedback.
series-shunt - a multistage amplifier in which the input stage has series feedback.
constant current source - a high impedance source that delivers the same load current
EQUIPMENT REQUIRED
F.A.C.E.T. base unit
Multimeter
Oscilloscope, dual trace
Generator, sine wave
TRANSISTOR FEEDBACK CIRCUITS circuit board