single supply oscillator

Discussion in 'The Projects Forum' started by eminthepooh, Jan 9, 2013.

  1. eminthepooh

    Thread Starter New Member

    Aug 26, 2012
    Hey guys, i'm building a wein bridge oscillator using a single 5v supply.
    My circuit is attached as well as the output i'm seeing on the scope.
    Since i'm sourcing the psudo ground (2.5v) thru the same opamp, i'm guessing it can't sink as much as it can source, hence the lop-sided output.

    I'm using a TL740 and have heard they are relatively old, so perhaps that's the problem?

    Any expertise would be appreciated, thank you.