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1)in cc configuration we use to get the low output impedence

where as in ce we use to get the high output impedence.

2)in cc amplifier we use to have the voltage gain equal to unity

where as in ce amplifier we use to have the high voltage gain.

3)in cc amplifier there is high power gai which is used for impedence matching

where as in ce amplifier due to the high voltage gain the impedence matching is

less impossible.

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14y ago
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11y ago

grounding the base in CB makes the base act as a shield between the input on the emitter and the output on the collector. this shield eliminates the undesired capacitive coupling from output back to input that might cause oscillation.

in the CE configuration there is no shielding between the input on the base and the output on the collector. this capacitive coupling might feed enough output back to the input to cause oscillation. this is much less likely to be a problem at lower frequency.

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10y ago
  • CE - voltage gain, current gain
  • CB - voltage gain, no current gain
  • CC - no voltage gain, current gain
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Q: Why CB amplifier preferred for high frequency than CE amplifier?
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