Low power systems for wireless microsensors
ISLPED '96 Proceedings of the 1996 international symposium on Low power electronics and design
Low power RF integrated circuits: principles and practice
ISLPED '99 Proceedings of the 1999 international symposium on Low power electronics and design
CMOS front-end LNA-mixer of micropower RF wireless systems
ISLPED '99 Proceedings of the 1999 international symposium on Low power electronics and design
Wireless integrated network sensors
Communications of the ACM
RF CMOS Cells for Wireless Applications
Analog Integrated Circuits and Signal Processing
Coverage density as a dominant property of large-scale sensor networks
CIA'06 Proceedings of the 10th international conference on Cooperative Information Agents
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New applications have recently appeared for a low power, low cost, “embedded radio”. These wireless interfaces for handheld mobile nodes and Wireless Integrated Network Sensors (WINS) must provide spread spectrum signaling for multi-user operation at 902-928 MHz. Cost considerations motivate the development of complete micropower CMOS RF systems operating at previously unexplored low power levels. Micropower CMOS VCO and mixer circuits, developed for these emerging narrow-band communication systems, are reported here. Design methods combining high-Q inductors and weak inversion MOSFET operation enable the lowest reported operating power for RF front end components including a voltage-controlled oscillator (VCO) and mixer operating at frequencies of 400 MHz — 1 GHz. In addition, the VCO, by virtue of its high-Q inductive components, displays the lowest reported phase noise for 1 GHz CMOS VCO system for any power dissipation.