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Virtual ground help

Discussion in 'Electronic Design' started by [email protected], Jul 29, 2013.

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  1. Guest

    Here's what I have and here's what I need: I have a 12v source of virtually unlimited current (car battery). What I need is a way to easily and cheaply produce plus and minus approximately 5 volts (not critical) at about 3 amps for an automotive application. From here I have to drive an op amp to produce say plus or minus 3 volts to drive a transducer with will require at least 2 amps at full swing. I can do this by buying DC converter modules, but at this current level they're pricy. Doing some checking, I've come across "rail splitters", something I've never dealt with in almost 40 yearsof repairing electronics.

    Any advice appreciated.

    Edwin
     
  2. Phil Allison

    Phil Allison Guest

    <>

    Here's what I have and here's what I need: I have a 12v source of virtually
    unlimited current (car battery). What I need is a way to easily and cheaply
    produce plus and minus approximately 5 volts (not critical) at about 3 amps
    for an automotive application. From here I have to drive an op amp to
    produce say plus or minus 3 volts to drive a transducer with will require at
    least 2 amps at full swing.

    ** Does this "transducer" require DC current or can it be AC coupled ?

    You need to supply more info.


    .... Phil
     
  3. Yup! More info.
    I've done low freequency 'rail splitting' If your 2 to 3 amps of current is is being returned to the virtual ground, then the device that's making that 'ground' from 0-12 Volts will be dissipating 6V*3A ~18 Watts.

    George H.
     
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