Electronics and Communication Engineering - Electronic Devices and Circuits - Discussion
Discussion Forum : Electronic Devices and Circuits - Section 9 (Q.No. 20)
20.
Choose the correct match for input resistance of various amplifier configurations shown below configuration.
| CB : Common Base | LO : Low |
| CC : Common Collector | MO : moderate |
| CE : Common Emitter | HI: High |
Discussion:
3 comments Page 1 of 1.
Clyde Maverick said:
7 years ago
@Parashu.Kn.
B is correct. The question asks for the arrangement according to the input impedance.
CB is a current buffer. Therefore, input impedance must ideally be zero.
CC is a voltage buffer. Therefore, input impedance must ideally be infinite.
B is correct. The question asks for the arrangement according to the input impedance.
CB is a current buffer. Therefore, input impedance must ideally be zero.
CC is a voltage buffer. Therefore, input impedance must ideally be infinite.
Siddeshwar said:
6 years ago
It's right. @Clyde Maverick.
CB is a current buffer. Therefore, input impedance must ideally be zero.
CC is a voltage buffer. Therefore, input impedance must ideally be infinite.
What about CE? Please Explain.
CB is a current buffer. Therefore, input impedance must ideally be zero.
CC is a voltage buffer. Therefore, input impedance must ideally be infinite.
What about CE? Please Explain.
Parashu.kn said:
8 years ago
Answer is A.
Collector -moderately doped.
Base-lightly doped.
Emitter- heavily doped.
Collector -moderately doped.
Base-lightly doped.
Emitter- heavily doped.
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