A PVT-independent Schmitt trigger with fully adjustable hysteresis threshold voltages for low-power 1-bit digitization applications

This paper proposes a process, voltage, temperature (PVT) independent Schmitt trigger with fully adjustable hysteresis threshold voltages. These characteristics are attributed to the proposition of a self-tuning circuit in the inverter-comparator, along with a feedback controlling network for hysteresis characteristic. The proposed Schmitt trigger is designed and fabricated with SMIC 0.13 mu m CMOS technology. It has much less power consumption of only 2.51 mu W, and features also an adjustable hysteresis threshold voltages ranging from 350mV to 850mV at a minimum supply voltage of 1.0V. All these advantages make it very suitable to work as 1-bit digitization in a low power sensing node.R&D project of Shenzhen Science and Technology Innovation Committee [JSGG 2013091840947999]; National Natural Science Foundation of China [61471011]SCI(E)EIARTICLEwangbo@pkusz.edu.cn171