Electronic Devices-BJIt Amplifiers
Electronic Devices-BJIt Amplifiers
1. Which of the following configurations has the lowest output impedance?
- Fixed-bias
- Voltage-divider
- Emitter-follower
- None of the above
2. Which of the h-parameters corresponds to re in a common-base configuration?
- hib
- hfb
- hrb
- hob
3. Which of the following is referred to as the reverse transfer voltage ratio?
- hi
- hr
- hf
- ho
4. For a common-emitter amplifier, the purpose of swamping is
- to minimize gain.
- to reduce the effects of r'e
- to maximize gain.
- no purpose.
5. What is the typical value of the current gain of a common-base configuration?
- Less than 1
- Between 1 and 50
- Between 100 and 200
- Undefined
6. An emitter-follower is also known as a
- common-emitter amplifier.
- common-base amplifier.
- common-collector amplifier.
- Darlington pair.
7. You have a need to apply an amplifier with a very high power gain. Which of the following would you choose?
- common-collector
- common-base
- common-emitter
- emitter-follower
9. A common-emitter amplifier has ________ voltage gain, ________ current gain, ________ power gain, and ________ input impedance.
- high, low, high, low
- high, high, high, low
- high, high, high, high
- low, low, low, high
10. The advantage that a Sziklai pair has over a Darlington pair is
- higher current gain.
- less input voltage is needed to turn it on.
- higher input impedance.
- higher voltage gain.