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Staigen

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Posts posted by Staigen

  1. Hi Zeppelin

    Many of us can't reach E-Lab at the moment! Not me, until now, not Ante, not Audioguru, and how many more that can't reach E-Lab at the moment, i dont know!

    is stated to be 0.5%+1?

    This mean that the accuracy is 0.5%, plus/minus 1 number(count)

    //Staigen
  2. Hi there sundin13, velcome to the forum! :)
    Sundin? Sounds like a Swedish name. Are you from Sweden?

    Some of the questions cant be answered, because there is a lack of some parameters!
    Vbe, for instance.
    But asume it is a perfect transistor(such transistor dont exist!) with a Vbe of zero votage and DCbeta=162.

    Question a:
    Since Vin=0V then Ib=0mA(uA,A), hence also Ic=0mA(uA,A), then the voltage across Rc=0V

    Question b:
    This one is harder, but it is only math! First you have to calculate the current throu Rc at saturation, then divide that with the beta value. If you calculate the Ic in other values than uA, then you have to convert the answer to uA.

    Question c:
    Here you can do the math in two ways. First way, divide the Vin voltage with the Ib current in uA, the answer is in Megohm, than convert to Kohm. Second way, convert the Ib current to mA, then divide the Vin voltage with that value, the answer is in mA.

    But watch out, there's a trap buildt in in this anwers! The trap only affects the c question. ??? ;D
    I belive you see the trap at once, once you have read throu the text once more.

    //Staigen

  3. Hi rybitski

    Start by learning electronics, there are many good books right here on this site!
    In the "Articles" area, and also here in the postings, many of then uploaded by Ante. Good luck!

    //Staigen

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