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spice simulation single supply opamp

Discussion in 'Electronic Design' started by [email protected], Mar 28, 2005.

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  1. Guest

    I am simulating a single supply opamp in an inverting opamp
    configuration with gain set to 1. I/P is an ac sine 200mVpp 0Voffset. I
    am using the TLC081 TI single supply opamp spice model.
    Qn) When input sine wave becomes +ve wrt gnd , then o/p should drive
    negative. Of course that can't happen because we have a single supply
    system. In the simulation i see an o/p DC offset(300mV) wrt which the
    o/p sine wave swings up and down. Does this mean that in a single
    supply opamp the o/p always gets a DC offset even if input has no DC in
    it? I don't qualatatively understand what happens when V- input of a
    single supply opamp crosses the V+ input(0V always in this case).
  2. Genome

    Genome Guest

    **** off!
    Not a problem.

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