The number of stages that can be directly coupled is limited because___________?
Correct answer: A. Changes in temperature cause thermal instability
- A. Changes in temperature cause thermal instability
- B. Circuit becomes heavy and costly
- C. It becomes difficult to bias the circuit
- D. None of the above
Explanation
Direct coupling passes dc as well as the signal, so temperature changes can shift transistor operating points and accumulate from stage to stage. This thermal drift limits the number of directly coupled stages.
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