Explanation needed for circuit!!

Discussion in 'General Electronics Chat' started by mechas, Feb 4, 2009.

  1. mechas

    Thread Starter New Member

    Oct 23, 2008
    3
    0
    Hi guys, can anyone please explain what will be the output for this circuit & its working...! Sorry, but please be as quick as possible as i need it urgently.
    thanks in advance..!

    Image114.jpg
     
  2. KL7AJ

    AAC Fanatic!

    Nov 4, 2008
    2,039
    287

    It's a clamp circuit. It will offset your input signal downwards by about 3.5 volts., with no small amount of distortion.

    eric
     
  3. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    It will clip the output voltage at about +5.7V.
     
  4. mechas

    Thread Starter New Member

    Oct 23, 2008
    3
    0
    This is what i came up with 2..but the answer given in the book is
    Image115.jpg
    The explaination given for this answer is that
    Code ( (Unknown Language)):
    1.  
    2. V[SIZE="1"]a[/SIZE] = [10kohm/(10+10)] * 5sinwt = 5sinwt
    3.  
    4. w = frequency (rad/sec).
    5. V[SIZE="1"]a[/SIZE] is the voltage at the anode of the diode.
    6.  
    7. Since maximum voltage at point A may be 5V, hence voltage across the diode always will be less than or equal to zero.
    8.  So it willbe reversed always.
    9.  
    I couldnt understand this explaination...is it incorrect or is there some part of the problem that i overlooked??

    Please point out the solution and Thanks for your quick replies, really appreciate it..!
     
  5. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    Yes, the book is right. I missed that both resistors are 10K (form a voltage divider) and the maximum output voltage is +-5V. Thus the diode will never conduct.
     
  6. mechas

    Thread Starter New Member

    Oct 23, 2008
    3
    0
    Thanks a lot guys for the help & especially mik3...solved the problem for me!!
    cheers :)
     
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