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GATE ECE 2008 | Question-53

Consider the Schmidt trigger circuit shown below.


A triangular wave which goes from $-12 \mathrm{~V}$ to $12 \mathrm{~V}$ is applied to the inverting input of the OPAMP. Assume that the output of the OPAMP swings from $+15 \mathrm{~V}$ to $-15 \mathrm{~V}$. The voltage at the non-inverting input switches between

  1. $-12 \mathrm{~V}$ and $+12 \mathrm{~V}$
  2. $-7.5 \mathrm{~V}$ and $+7.5 \mathrm{~V}$
  3. $-5 \mathrm{~V}$ and $+5 \mathrm{~V}$
  4. $0 \mathrm{~V}$ and $5 \mathrm{~V}$
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