Diff. B/W CE,CB,CC?

Electroenthusiast · Sep 23, 2009

What are the Differences B/W Common Emitter, Common Collector, Common Base? Exact Differences
" Can anyone Give the Diag. for All these in Different Biasing Methods like FIXED BIAS, EMITTER BIAS, VOLTAGE DIVIDER BIAS "?
And Explain them Briefly?

I Think i should have to get 3x3 = 9 Diagrams !
(Like., CE Configuration in FIXED BIAS, EMITTER BIAS, VOLTAGE DIVIDER BIAS and other Two)

KMoffett · Sep 23, 2009

Common collector - Wikipedia, the free encyclopedia
Common emitter - Wikipedia, the free encyclopedia
Common base - Wikipedia, the free encyclopedia

Ken

audioguru · Sep 23, 2009

I think you need to study about transistor circuits.

ParkingLotLust · Sep 23, 2009

A common base amp has low input impedance, high output impedance and voltage gain, but no power gain.

A common emitter amp has a relatively high input impedance, high output impedance, and can have both voltage and power gain.

Common emitter amps (also known as an emitter-follower) have a high input impedance and low output impedance. The voltage gain is slightly less than one (usually 0.9__), but it has current and power gain. It is used to buffer high impedance sources to low impedance loads.

Phew, what a good review of first semester.

crutschow · Sep 23, 2009

ParkingLotLust said:
A common base amp has low input impedance, high output impedance and voltage gain, but no power gain.

A common emitter amp has a relatively high input impedance, high output impedance, and can have both voltage and power gain.

Common emitter amps (also known as an emitter-follower) have a high input impedance and low output impedance. The voltage gain is slightly less than one (usually 0.9__), but it has current and power gain. It is used to buffer high impedance sources to low impedance loads.

Phew, what a good review of first semester.

You missed something in that first semester.

Perhaps you meant that a common-base amp does not have current gain but it can indeed have power gain. Since the input is low impedance and power = I²R, then the output power for a given current is greater than the input power if the output collector load has a higher resistance than the transistor input resistance.

mneary · Sep 29, 2009

ParkingLotLust said:
Common emitter amps (also known as an emitter-follower) have a high input impedance and low output impedance. The voltage gain is slightly less than one (usually 0.9__), but it has current and power gain. It is used to buffer high impedance sources to low impedance loads.

You were probably thinking common collector, which is also known as emitter follower.

Phew, what a good review of first semester.

Electroenthusiast · Oct 3, 2009

audioguru said:
I think you need to study about transistor circuits.

Thanks....must go through various good books to understand in a clear manner...

Roff · Oct 3, 2009

ParkingLotLust said:
A common base amp has low input impedance, high output impedance and voltage gain, but no power gain.

A common emitter amp has a relatively high input impedance, high output impedance, and can have both voltage and power gain.

Common emitter amps (also known as an emitter-follower) have a high input impedance and low output impedance. The voltage gain is slightly less than one (usually 0.9__), but it has current and power gain. It is used to buffer high impedance sources to low impedance loads.

Phew, what a good review of first semester.

All three configurations can have power gain.

Diff. B/W CE,CB,CC?

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