Design of Ultra Low Power 8-Channel Analog Multiplexer Using Dynamic Threshold for Biosignals

Abstract

The design of an ultra low voltage, low power high speed 8 channel Analog multiplexer in 180nm CMOS technology is presented. A modified transmission gate using a dynamic threshold voltage MOSFET (DTMOS) is employed in the design. The design is optimized with respect to critical requirements like short switching time, low power dissipation, good linearity and high dynamic range with an operating voltage of 0.4V. The ON and OFF resistances achieved are 32 ohms and 10Mohms respectively with a switching speed of 10MHz. The power dissipation obtained is around 2.65uW for a dynamic range of 1uV to 0.4V.