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Electronic Devices and Circuits

Q1: 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

A CB-LO, CC-MO, CE-HI

B CB-LO, CC-HI, CE-MO

C CB-MO, CC-HI, CE-LO

D CB-HI, CC-LO, CE-MO

ANS:B - CB-LO, CC-HI, CE-MO

@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.



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