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In three-transister cascaded amplifier gain can be be calculated simply by multiplying the three individual gains of every amplifier.But one should take care that for first and second transister R-OUT is taken in consideration with R-INPUT of second and third transitor respectively and R-INPUT resistance can be neglected if it is very high as in the case of common-emitter. Simlarly R-INPUT of second and third should be taken into consideration with R-OUTPUT of first and second transistor respectively.

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โˆ™ 2006-04-08 12:33:39
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Q: How do you calculate a gain in a three-transistor cascaded amplifier?
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