CB -Unity current gain amplifier

Q.  Which type of amplifiers exhibit the current gain approximately equal to unity without any current amplification?
- Published on 23 Sep 15

a. CE
b. CB
c. CC
d. None of the above

ANSWER: CB

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    Discussion

  • vinod kumar   -Posted on 22 Dec 16
    hii...my
  • Satyawati   -Posted on 29 Sep 15
    In common base amplifier, input signal is applied at emitter terminal while the amplified output signal is obtained at the collector terminal with respect to ground.
    For the AC signals, the base terminal is specifically connected to ground through the capacitor.
    Apart from this, common base amplifier exhibits low input resistance & hence this feature provides the basis for source loading.
    Even, the output resistance is very high & hence, the current gain is approximately equal to unity. Due to this, there is no possibility of current amplification. Consequently, the CB amplifier exhibits high voltage gain.

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