Noninverting Schmitt Trigger Circuit with Improved Hysteresis Behavior

This work brief a noninverting Schmitt trigger circuit with improved noise immunity. The work integrates the investigation of the proposed dual threshold controlled Schmitt trigger (DTC-ST) in terms of low switching power consumption, less propagation delay, and reduced leakage power. Thus, the end result of the proposed DTC-ST yields well-defined hysteresis behavior and better noise immunity due to the use of one PMOS and one NMOS as a two-layered feedback approach which can be employed in the low-noise receiver and waveform reshaping circuit applications. The DTC-ST has $2.89\times, 1.64\times$, and $4.9\times$ less delay, dynamic power, and leakage power respectively in comparison to the conventional Schmitt trigger. Further, 5000 Monte Carlo simulations reveal that low variation in $\mathrm{V}_{\mathrm{LH}}$ and $\mathrm{V}_{\mathrm{HL}}$ of the proposed circuit makes it a robust design.