Confused in concepts of Q-point

Adjuster

Joined Dec 26, 2010
2,148
Why do we find Q-point at no input signal?
By definition, the Q-point is the quiescent working point, in other words the current and voltage conditions which apply in the absence of any signals.

Applying an input signal causes the conditions to swing away from the Q-point. The amplifier is not then in its quiescent condition. In the presence of a signal, even the average working point may depart from its quiescent value due to non-linear effects.
 
Top