Stabilization
When the temperature changes or the transistor is replaced
the operating point also changes. However for faithful amplification, the
operating point must be remains fixed. This necessity to make the operating
point independent of these variations. The process of making operating point
independent of temperature changes or variations in transistor parameters is
known as stabilization.
Thus for maintaining the operating point independent of these
variations, the following techniques are used. They are
1. Stabilization technique
2. Compensation technique
Need of Stabilization
The following are the factors that effect the stability of
the operating point.
1. Temperature dependence of IC
2. Change of VBE and β due to
replacement of transistor