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TL082: TL082 abnormal output waveform

Nam, Dino
Expert 6325 points
Part Number: TL082

Hello team,

Please review below schematic and output waveform. I think below output is abnormal(redbox).Would you please let me know your opinion why abnormal output is occured?

<Schematic>

<Waveform>

Thank you.

  • 0
    TI__Guru**** 153286 points

    Dino,

    Two reasons.

    First is that input common mode range only goes down to VCC- + 4V

    Second is a non-inverting input is close to VCC- will forward bias JFET gate to drain and makes the output high.

    Check out device schematic in data sheet and you will see this too.