Non-inverting Schmitt trigger - An introduction

Introduction: The section below is the detailed explanation of the Non-inverting Schmitt Trigger.

Non-inverting Schmitt trigger:

• In the case hereby, feedback is provided at the non-inverting terminal.
• The inverting terminal is here grounded and along with this, the input voltage is apparently connected to the non-inverting input. fig1. 1, depicts a non-inverting Schmitt trigger circuit.

Fig. 1.1

• For the circuit behavior analysis, lets make an assumption that the produced output is saturated negative.
• Then the feedback voltage is also negative (-V_sat). Then the feedback voltage is also negative.
• This feedback voltage will hold the output in negative saturation until the input voltage becomes +ve as much as required to result into making voltage positive.

• When v_in  turns to be positive and eventhe magnitude is higher than than (R₂ / R₁) V_sat, then in such a case, the output turns to +V_sat.
•  Therefore, the UTP at which the output switches to +V_sat, is given by

• Similarly in the case wherein the output is at the saturation that is positive, feedback voltage is definitely positive.
• To turn out to the output states, then input voltage has become negative enough to make.
• When it happens, the output amends to the negative state from positive saturation to negative saturation voltage negative.