AC current ratios ac and ac convert directly from h parameters.
Answer: Option B
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Besides the fact that DC = IC/IB and ac = IC/IB, these quantities are always the same for purposes of small-signal amplification.
Answer: Option A
r'e is temperature dependent.
Answer: Option E
A common-collector amplifier has high input impedance, good current gain, and a voltage gain of 1.
The total voltage gain of a multistage amplifier is the product of the individual stage gains.
Answer: Option D
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