No, that is not exactly correct. While it is true that one characteristic of the common collector (emitter follower) is that its voltage gain is very nearly unity, its current gain can be much higher (equal to Beta in fact) and it can demonstrate a "power gain" as a result.
In the common collector (emitter follower) configuration,
!!!!!current gain = Ie / Iin, Beta(ac)!!!!!! is the maximum achievable current gain in both common-collector and common-emitter amplifiers.
Source(s):
self
Electronic Devices: Electron Flow Version/ 5th. Edition, by Floyd
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2007-08-23 10:03:52 · 3 answers · asked by Doopy D 1 in Science & Mathematics ➔ Engineering
If the voltage gain = 1 (approx.) and the current gain = Beta, then the Power gain = Vgain * Igain = 1.0 * Beta
So, the power gain theoretically be as high as Beta.
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2007-08-23 10:26:10 · answer #1 · answered by tlbs101 7 · 0⤊ 0⤋
You don't make it clear what your question is.
Are you wondering why the common collector gain β+1 and the hfe gain β are different?
The fact is that for gains much greater than 1 then β is approximately equal to β+1.
2007-08-23 10:26:12 · answer #2 · answered by Anonymous · 1⤊ 0⤋
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2016-12-12 10:38:57 · answer #3 · answered by ? 4 · 0⤊ 0⤋