Dual supply voltage from a 9V battery

Discussion in 'The Projects Forum' started by Teszla, Jan 26, 2014.

  1. Teszla

    Thread Starter Member

    Jun 7, 2013
    43
    0
    I want to drive an op amp with dual supply using only a (9V) battery.

    I'm thinking it can be made by having 9V at the +supply, 0V at the -supply and then connecting the ground reference to 4.5V? But would that really work? Would that really be the same as having an actual dual supply?
     
  2. ericgibbs

    AAC Fanatic!

    Jan 29, 2010
    2,504
    380
    Its possible use a 'spare' OPA to create a virtual ground for +/-4/5V from a 9V supply.

    Are you amplifying DC or AC signals.?
     
  3. Teszla

    Thread Starter Member

    Jun 7, 2013
    43
    0
    How? :)

    The op amp will be used as a Wien bridge oscillator, so that means the input signal is DC and the output signal is AC.
     
  4. ericgibbs

    AAC Fanatic!

    Jan 29, 2010
    2,504
    380
Loading...