Need help on Amplitude Shift keying

Discussion in 'Homework Help' started by victorment, Feb 25, 2011.

  1. victorment

    Thread Starter Member

    Jul 4, 2010
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    I have a project at school. The professor requires as to make a circuit that outputs Amplitude shift keying. If I input 1101. the output amplitude should be shifted varying on the input. can someone please help with this project. thanks in advance
     
  2. bertus

    Administrator

    Apr 5, 2008
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  3. victorment

    Thread Starter Member

    Jul 4, 2010
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    thanks man. But I have no idea on how to make a circuit of ask. Can you help me?
     
  4. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    What did you mean by "If I input 1101"?
    Do you mean that the output voltage must be controllable by a 4 bit code?
     
  5. victorment

    Thread Starter Member

    Jul 4, 2010
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    Yes. It is controllable by a 4 bit code. Can you help me? Ive tried to add the square wave carrier and the frequency sine wave. But the output is inverted. If logic 1 is present the output wave form would be low and when logic 0 is present the output would be high. Is this correct? Can you help me with this?
     
  6. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    A four bit code can yield 2^4=16 different output levels. You had better find out if this is what is required.
     
  7. victorment

    Thread Starter Member

    Jul 4, 2010
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    Yes that is the required. If I input 1011 the anmplitude should be 1011. Can you help me with this?
     
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