When a multistage amplifier is to amplify d.c. signal, then one must use_____________coupling?
Correct answer: C. Direct
- A. RC
- B. Transformer
- C. Direct
- D. None of the aboveCompare Local Schools
Explanation
Direct coupling is used for DC amplification because it passes both the signal and its DC component from one stage to the next. RC and transformer coupling block DC between stages.
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