Diodes

Discussion in 'General Electronics Chat' started by krgoutham, Jul 27, 2006.

  1. krgoutham

    Thread Starter Member

    Dec 8, 2004
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    Hello

    Are there any diodes available in the market that are better than the conventional ones. FOr eg, the commercially avaialble diodes have a drop of 0.3 volts. Are there any diodes available that have a much lesser voltage drop.

    Thanks
     
  2. Dave

    Retired Moderator

    Nov 17, 2003
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    What sort of forward voltage drop are you requiring?

    It is usually Germanium diodes that have a voltage drop of about 0.3V and I have heard of some having forward voltage drops of down to 0.2V. However, it is primarily material dependant.

    Dave
     
  3. mrmeval

    Distinguished Member

    Jun 30, 2006
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  4. BladeSabre

    Senior Member

    Aug 11, 2005
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    I'm using BAT754 Schottky diodes, which have a forward voltage drop of 0.2V (at very small currents only). I've not come across anything better than that.
     
  5. Ron H

    AAC Fanatic!

    Apr 14, 2005
    7,050
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    What are you using them for? There are feedback circuits (and feed-forward circuits) that, in some applications, can reduce the forward drop to essentially zero.
     
  6. Dave

    Retired Moderator

    Nov 17, 2003
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  7. BladeSabre

    Senior Member

    Aug 11, 2005
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    Protection circuits for chips where the inputs can't go below -0.3V. I'd be very interested to hear about that though.

    "100's of mV" >= 0.2V
     
  8. Dave

    Retired Moderator

    Nov 17, 2003
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    Ignore my stupidity! I was thinking that the MOS technology had forward voltages in the region of 100's of micro-volts. As it happens I can't read or type.

    Dave
     
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