Electronic Devices

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Author:
Anonymous
ID:
64342
Filename:
Electronic Devices
Updated:
2011-02-05 18:38:48
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Description:
Diode Applications
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  1. Define: Clamper
    A circuit that adds a dc level to an ac voltage using a diode and a capacitor.
  2. Define: DC power supply
    A circuit that converts ac line voltage to dc voltage and supplies constant power to operate a circuit or system.
  3. Define: Filter
    In a power supply, the capacitor used to reduce the variation of the output voltage from a recitifier.
  4. Define: Full-wave rectifier
    A circuit that converts an ac sinusoidal input voltage into a pulsating dc voltage with one output pulse occurring for each input cycle.
  5. Define: Half-wave recitifier
    A circuit that converts an ac sinusoidal input voltage into a pulsating dc voltage with one ourput pulse occurring for each input cycle.
  6. Define: Limiter
    A diode circuit that clips off or removes part of a waveform above and/or below a specidied level.
  7. Define: Line regulation
    The change in output voltage of a regulator for a given change in input voltage, normally expressed as a percentage.
  8. Define: Load regulation
    The change in output voltage of a regulator for a given range of load currents, normally expressed as a percentage.
  9. Define: Peak inverse voltage(PIV)
    The maximum value of reverse voltage across a diode that occurs at the peak of the input cycle when the diode is reverse-biased.
  10. Define: Rectifier
    An electronic circuit that converts ac into pulsating dc; one part of a power supply.
  11. Define: Regulator
    An electronic device or circuit that maintains an essentially constant output voltage for a range of input voltage or load values; one part of a power supply.
  12. Define: Ripple voltage
    The small variation in the dc output voltage of a filtered rectifier caused by the charging and discharging of the filter capacitor.
  13. Define: Troublshooting
    A systematic process of isolating, identifying, and correcting a fault in a circuit or system.
  14. Summary Question - The dc power supply typically consists of what?
    tranformer, diode rectifier, a filter, and regulator
  15. Summary Question - What does the output frequency of a half-wave rectifier equal?
    the input frequency
  16. Summary Question - What is (PIV)?
    Peak Inverse Voltage is the maximum voltage appearing across the diode in reverse bias.
  17. Summary Question -What is the output frequency of a full-wave rectifier?
    is twice the input frequency.
  18. Summary Question - What are the two basic types of full-wave rectifier?
    center-tapped and bridge.
  19. Summary Question - What is the output voltage of a center-tapped full-wave rectifier?
    is twice the peak output voltage plus one diode drop.
  20. Summary Question - What is the PIV for each diode in a center-tapped full-wave rectifier?
    is twice the peak output voltage plus one diode drop
  21. Summary Question -What does the peak output voltage of a bridge rectifiere equal?
    the total peak secondary voltage less two diode drops.
  22. Summary Question - The PIV for each diode in a bridge rectifier is what?
    • is approximately half that required for an equivalent center-tapped confiuration and is equal to the peak output voltage plus one diode
    • drop.
  23. Summary Question - The ize of the Ripple voltage means what?
    The smaller the ripple voltage, the better the filter.
  24. Summary Question - What is input or line regulation?
    Regulation of output voltage over a range of input voltages.
  25. Summary Question - What is load regulation?
    Regulation of output voltage over a range of load currents.
  26. Summary Question - What do clippers do?
    Diode limiters cut off voltage above or below specified levels. Also called clippers.
  27. Summary Question - What do diode clampers do?
    They add a dc level to an ac voltage.
  28. Summary Question - What are voltage multipliers used for?
    high-voltage, low current applications such as for electron beam acceleration in CRTs and for particle accelerators.
  29. Summary Question - What does the voltage multiplier use?
    a series of diode-capacitor stages.

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