A Low -- Power and High -- Efficiency CMOS Transmitter for Wireless Sensor Network Application

This paper presents the design and simulation of the front-end low power transmitter for wireless sensor network application. The transmitter features simple circuitry with circuit techniques that reduce the power consumption and gives higher efficiency. The used modulation scheme is a modified version of ASK with better continuity to make it eligible for Wireless Passive Sensor Networks applications. The proposed transmitter features simple circuitry (smaller size), It operates in the ISM band (902-928 MHz) at 50 Kbps data rate. It achieves -6 dBm output power consuming 1.13 mW from a 1.8 V power supply. It was implemented and simulated using 0.18 um CMOS technology.