Question
Please solve the full solution and explain
Choose the best answer to each of the following Which of these types of amplifiers has the lowest output impedance? BJTCE BJT eminer follower BJT CB JFET CS Which of these amplifier types has the greatest value of JFETCS BJT CB JFET Source Follower MOSFET CS Which of these amplifier types has the highest input impedance? BJTCE JFET CD BJT Emitter Follower Which of these amplifier types is likely to have the highest upper cutoff frequency? BJTCB BJTCE Which of these amplifier types do you expect to have the lowest value of JFET Source Follower BJTCE BJTCB BJTCC Which of these amplifier types do you expect co have !he lowest value of BJTCE MOSFETCS BJT Emitter Follower
Explanation / Answer
A. common base its only Re B. MOSFET CS C. common drain because mos gate no current flows D. Common Base E. common base current gain = nearly 1 input emitter o/p collector gain is 1/alpha =1 F. BJT Emitter follower voltage gain = nearly 1 because input base output emitter which is same as the earlier