Transistor Amplifier Circuits Unit 5 – Bias Stabilization
If a circuit is not designed to overcome the effects of temperature change, the location of the Q-
point can move toward the saturation or cut-off points causing signal distortion.
A transistor amplifier circuit with a base voltage divider and an emitter resistor fixes the bias
voltage levels and, therefore, has good bias temperature stability. The stability factor (S) is a
measure of a transistor circuit's bias stability with changes in temperature.
NEW TERMS AND WORDS
collector leakage current (ICBO) - current caused by the reverse bias voltage between the
collector and the base. ICBO increases with temperature.
EQUIPMENT REQUIRED
F.A.C.E.T. base unit
Multimeter
Clock
TRANSISTOR AMPLIFIER CIRCUITS circuit board