Elect 244 Linear Integrated Circuits Final Examination 4 August 2000 a) A compar

Question

Elect 244 Linear Integrated Circuits Final Examination 4 August 2000 a) A comparator op amp circuit has L negative feedback only positive feedback only Ill both positive and negative feedback. IV, no feedback b) A signal generator op-amp circuit has negative feedback only, positive feedback only. Ill both positive and negative feedback. IV. no feedback. c) In order for an op-amp circuit to exhibit hysteresis, it must have L positive feedback. ll negative feedback no feedback. none of the above. Circle each of the characteristics that apply to instrumentation amplifiers. low input impedance high input impedance single input differential input output voltage referenced to ground floating output voltage

Explanation / Answer

1. I negative feedback only
2.III both positive and negative feedback
3. I positive feedback
4. high input impedence
    differential input
floating output voltage

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