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【单选题】
This is a typical emitter follower. What is the main benefit obtained by use of an emitter follower?A.
Open for current flow between the operational amplifier and the transistor 2N5194.
B.
Making voltage drop of approximate 0.5V between the operational amplifier and the transistor 2N5194.
C.
Blocking inductive kick from the solenoid.
D.
Blocking for +15V to the emitter of the transistor 2N5194.
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