Question

The circuit shown in the figure is that of

a. a non-inverting Amplifiers 

b. an inverting Amplifiers 

c. an oscillator 

d. a Schmitt trigger

Answer 1

 It is a Schmitt trigger circuit.

The circuit has positive feedback and in positive feedback, opamp operates in its saturation region. It is a fast operating voltage level detector.

The circuit switches between negative and positive output voltage levels (- V_sat to V_sat).