NEETS 7.txt

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bc901
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286901
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NEETS 7.txt
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2014-10-24 01:23:58
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  1. Four classes of amplifier operations
    Classes A, AB, B, and C
  2. Class ___ amplifiers are biased so that variations in input signal polarities occur within the limits of CUTOFF and SATURATION.
  3. A
  4. Amplifiers designed for class ___ operation are biased so that collector current is zero (cutoff) for a portion of one alternation of the input signal
  5. AB
  6. Amplifiers biased so that collector current is cut off during one-half of the input signal are classified class __.
  7. B
  8. In class ___ operation, collector current flows for less than one half cycle of the input signal
    C
  9. _____ is the faithful reproduction of a signal.
  10. Fidelity
  11. The ________ of an amplifier refers to the ratio of output-signal power compared to the total input power.
  12. efficiency
  13. ___________ is the most frequently used configuration in practical amplifier circuits, since it provides good voltage, current, and power gain.
  14. COMMON-EMITTER CONFIGURATION (CE)
  15. ______________ is mainly used for impedance matching, since it has a low input resistance and a high output resistance. It also has a current gain of less than 1.
  16. COMMON-BASE CONFIGURATION (CB)
  17. The ___________ is used as a current driver for impedance matching and is particularly useful in switching circuits.
  18. COMMON-COLLECTOR CONFIGURATION (CC)
  19. The voltage at which the sudden increase in current occurs is called the __________
    BREAKDOWN VOLTAGE
  20. The life expectancy of the LED is very long, over _______ hours of operation.
    100,000
  21. Transistors are semiconductor devices with _______ or more terminals.
    three
  22. A second type of field-effect transistor has been introduced in recent years that has some advantages over the JFET. This device is the ___________________.
  23. metal oxide semiconductor field effect transistor (MOSFET)

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