A Very Low Voltage Mixer for Baseband Wireless Sensor Applications

Main Article Content

Panavy Pookaiyaudom
Apisak Worapishet


An enhanced mixer topology suitable for very low supply voltage applications is developed. The circuit introduces a linear resistor network to the conventional mixer based on cross-coupled triode MOS transistors to render extended transistors’ operation and linearity improvement at a low supply. Detailed analysis that leads to a systematic design is outlined. The feasibility of the mixer for baseband wireless sensor applications is demonstrated through simulation of a 0.5-V demodulator for IEEE 802.15.4 radio using regular transistors in a 1.8V 0.18µm CMOS process with VT0 = 0.4V which is as large as 80% of the supply voltage. Also provided to verify its practicality is the experimental demodulator at a reduced data rate based upon a breadboard implementation using array transistors.

Article Details

Research Articles