Performance evaluation of subthreshold Schmitt trigger using body bias techniques

The technique of body biasing has achieved great success in modern IC design as in it, is possible to alter the threshold voltage of MOS transistor so that device leakage and timing performance can be improved. In this paper a Schmitt trigger circuit has been designed using four types of body bias techniques. The proposed circuits were simulated in SPICE 180nm CMOS technology parameters. A comparative study of all the proposed Schmitt trigger circuits in terms of lower and upper threshold voltages, noise margins and power dissipation has been done and specific applications for each circuit has been suggested.