Electronics and Communication Engineering - Analog Electronics
Exercise :: Analog Electronics - Section 11
| 41. |
Which of the amplifier circuits using junction transistors has the best gain? |
| A. |
Common emitter | | B. |
Common base | | C. |
Common collector | | D. |
All above has the same gain |
Answer: Option A
Explanation:
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| 42. |
To obtain very high input and O/P impedance in a feedback amplifier, the type of feedback utilized |
| A. |
voltage series | | B. |
current series | | C. |
voltage shunt | | D. |
current shunt |
Answer: Option B
Explanation:
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| 43. |
The thermal resistance of a BJT is about |
| A. |
100° C/W | | B. |
200° C/W | | C. |
20° C/W | | D. |
2° C/W |
Answer: Option B
Explanation:
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| 44. |
Oscillator with best frequency stability is |
| A. |
Crystal oscillator | | B. |
Phase shift oscillator | | C. |
Clapp oscillator | | D. |
Hartley oscillator |
Answer: Option A
Explanation:
|
| 45. |
The IF amplifier in a superheterodyne receiver is |
| A. |
single-stage single-timed amplifier | | B. |
two stage of single tuned amplifier | | C. |
double tuned amplifier | | D. |
class-C amplifier |
Answer: Option B
Explanation:
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