Design and Analysis of DTMOS based Low Voltage OTA and its Filter Application

Abstract

In this paper, two low-voltage, low-power dynamic threshold MOSFET (DTMOS) based OTA is designed. Two-stage OTA has been used in DTMOS based OTA-I. It comprises 5 DTMOS transistors, and the remaining are usual transistors. In DTMOS based OTA-II, current mirror OTA has been used. It comprises 6 DTMOS transistors and the remaining are standard transistors. By using DTMOS technique, the power dissipation of designed OTAs is very low. The paper's main goal is to use the DTMOS approach to create a low-voltage, low-power OTA which is useful for analog signal processing application. The power dissipation of designed OTA-I and OTA-II are 0.0266nW and 0.000123nW respectively. Also, an active filter application has been designed with the help of DTMOS based OTA-I and OTA-II. The designed OTAs and their active filter have been implemented with the help of 0.18µm CMOS technology. The proposed OTAs operate at ±0.2V supply voltage.