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H-bridge

Discussion in 'Electronic Basics' started by lerameur, Jan 18, 2007.

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  1. lerameur

    lerameur Guest

    hello,

    I am trying to design an H-bridge base on MOSFETS.
    My circuit under simulation was not working and founf this link.
    http://www.armory.com/~rstevew/Public/Motors/H-Bridges/Blanchard/h-bridge.htm
    I tried the circuit and it has the same problem as mine.
    The Pmos on top, either they are acivated (gate) or not, they are both
    alsways in saturation, therefore they both conduct no matter what input
    I have. what is wrong ? why si this happening
    thanks

    ken
     
  2. lerameur

    lerameur Guest

    I found the problem

    k


    lerameur a écrit :
     
  3. Brian Ellis

    Brian Ellis Guest

    That circuit looks fine. Are you using enhancement or depletion mode
    MOSFETS? You should be using enhancement mode MOSFETS.

    Brian Ellis
     
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