Ultra-Low Power Wireless Technologies for Sensor Networks / Edition 1

by Brian Otis, Jan Rabaey

Overview

transconductance efficiency of all critical devices in order to reduce the n- essary bias current. However, reducing the current density also results in a severely decreased device f . An optimization of the current density is re- T quired to provide the correct balance between transconductance efficiency and bandwidth. Plots such as Figure 2. 1 are useful tools for designers when choosing appropriate transistor bias points. Technology scaling allows greatly increased f realization for a given IC. Thus, weak inversion biasing for RF T design will become increasingly useful in future technology nodes. Throughout this work, the IC of critical transistors will be discussed. Most of the RF devices are biased in moderate to weak inversion to achieve enhanced transconductance efficiency and reduced bias current. 2. 2 MEMS Background The relatively new field of Radio Frequency Microelectro Mechanical Systems (RF MEMS) provides unique opportunities for RF transceiver designers. This section provides background on RF MEMS and provides insight into the - portunities presented by these new technologies. The field of RF MEMS - cludes the design and utilization of RF—lters, resonators, switches, and other passive mechanical structures constructed using bulk processed integrated c- cuit fabrication techniques. To date, these devices have been commercially used as discrete board-mounted components, primarily used to enhance the miniaturization of mobile phones. However, RF MEMS components have the potential to be batch fabricated using existing integrated circuit fabrication techniques.

Product Details

ISBN-13:	9780387309309
Publisher:	Springer US
Publication date:	04/04/2007
Series:	Integrated Circuits and Systems
Edition description:	2007
Pages:	184
Product dimensions:	6.10(w) x 9.25(h) x 0.02(d)

Table of Contents

Wireless Sensor Networks.- Low Power CMOS Design for Radio Frequencies.- Two Channel Baw-Based Transceiver.- Super-Regenerative Receiver Design.- Fully Integrated Super-Regenerative Transceiver.- Integration Techniques.- Ultra-Low Power Radio in a Package Using Ultra-Wide Band Technology.- Low Energy Wireless Communication.- Conclusions.