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NdeveR Group Title

H4P1: Zener Regulator A non-ideal voltage source can be modeled by a series combination of an ideal DC voltage source, a resistance, and a small-signal voltage source. The small-signal source is included to represent the noise inherent in the source. This model is illustrated in the figure below: In practice, connecting the non-ideal voltage source to a load may result in undesirable effects due to the noise voltage vo appearing across the load. This problem studies such effects and how a Zener diode may be used to ameliorate the problem. Assume that VI=13.0V, RIN=1kΩ, and vi=20.0m

  • one year ago
  • one year ago

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  1. NdeveR Group Title
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    there is more to this problem: and here are some pictures Again, we calculate vo (i.e. output noise) and VO (i.e. DC output voltage) for RL=2kΩ and RL=4kΩ for this new circuit. Hint: Your first job here is to determine which of the three regions of the piecewise-linear characteristic of the Zener is the one containing the operating point: we suggest you sketch a load line, but be very careful about the signs. Once you have determined where the operating point is, you can model the Zener in the circuit with a series combination of an independent voltage source and a resistor.

    • one year ago
  2. NdeveR Group Title
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    so far, i have only been able to solve for RL=2kohm, Vo is 8.6667 volts. if anyone could explain this one i'd appreciate it.

    • one year ago
  3. nick67 Group Title
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    |dw:1348666679433:dw|

    • one year ago
  4. nick67 Group Title
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    |dw:1348667042917:dw|

    • one year ago
  5. nick67 Group Title
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    |dw:1348667163811:dw|

    • one year ago
  6. nick67 Group Title
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    |dw:1348667507556:dw|

    • one year ago
  7. Sparkle Group Title
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    What about the last bit, minimum value of RL..Im getting it wrong.

    • one year ago
  8. nick67 Group Title
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    @Sparkle could you better explain your problem, pls :-)

    • one year ago
  9. dany Group Title
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    Teh minimum value of RL is the value of RL when the voltage across the RL is equal to that of Vz

    • one year ago
  10. yahya.aamir Group Title
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    @nick67, I tried looking at the your explanation. But couldn't figure out the answer when the Zener diode is implemented. Could you please explain it again?

    • one year ago
  11. nick67 Group Title
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    @yahya.aamir Hi, you should separate DC and AC analysis, this way: |dw:1349534424806:dw|

    • one year ago
  12. nick67 Group Title
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    |dw:1349534977332:dw|

    • one year ago
  13. yahya.aamir Group Title
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    Thanks @nick67. I really appreciate it. :-)

    • one year ago
  14. nick67 Group Title
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    you're welcome

    • one year ago
  15. mahi1431 Group Title
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    hey plz explain me clearly

    • one year ago
  16. nick67 Group Title
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    @Nurali could you post the question in a separate post ? I'm quite sure that Stefo should be very interested, too; he has big knowledge about FETs

    • one year ago
  17. ammanjordan Group Title
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    Can we have the results as results (Numbers)?

    • one year ago
  18. nick67 Group Title
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    @ammanjordan from http://openstudy.com/code-of-conduct : Give Help, Not Answers I will encourage and guide those needing help, and not just give them an answer

    • one year ago
  19. ammanjordan Group Title
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    Thank nick67, solving the problem, i found the value of Vo for RL=ΚΩ, also, i found the same Vo when RL = 4ΚΩ. How i can find the relevants u0 when RL=2 and 4 ΚΩ?

    • one year ago
  20. ammanjordan Group Title
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    Hi guys, can i have some method to find vo for RL= 2 and 4 ΚΩ. thanks.

    • one year ago
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