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Electronic Devices - BJT Amplifiers

Exercise : BJT Amplifiers - General Questions
46.
In an unbypassed emitter bias configuration hie replaces ________ in the re model.
re
re
Ib
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
Which of the following is (are) true regarding the input impedance for frequencies in the midrange 100 kHz of a BJT transistor amplifier?
The input impedance is purely resistive.
It varies from a few ohms to megohms.
An ohmmeter cannot be used to measure the small-signal ac input impedance.
All of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
For the collector dc feedback configuration, there is a ________ phase shift between the input and output signals.
0º
45º
90º
180º
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
A common-collector amplifier has ________ input resistance, ________ current gain, and ________ voltage gain.
high, high, low
high, low, low
high, low, high
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
The total gain of a multistage amplifier is the ________.
sum of individual voltage gains
sum of dB voltage gains
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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