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Advisor(s)
Abstract(s)
The paper describes a radio frequency transceiver designed in UMC RF 0.18 µm CMOS process. This process has a poly and six metal layers, allowing the
use of integrated spiral inductors (with a reasonable
quality factor), high resistor value (a special layer is
available) and a low-power supply of 1.8 V. This
RF CMOS transceiver will be applied to implemented
a wireless sensors network in a wireless electronic
shirt for helping health professionals with rapid,
accurate and sophisticated diagnostic concerning
cardiopulmonary disease in order to evaluate the
presence of breathing disorders in free-living patients.
Without proper design, communication will increase
network power consumption significantly because
listening and emitting are power-intensive activities.
Thus, in order to optimise power consumption, it
was included in the design of the RF transceiver, the
use of control signals. With these control signals it is
possible to enable and disable all the transceiver
subsystems. These signals allows for example to
switch off the receiver when a RF signal is being
transmitted, to switch off the transmitter when a RF
signal is being received, and to put the transceiver in
sleeping mode when neither RF signals are being
transmitted, nor being received.
Description
Keywords
Wireless sensors networks RF CMOS transceiver Low-power design
Citation
Carmo, João; Mendes, P.M.; Couto, Carlos; Correia, J.H. (2005). A 2.4-GHz RF CMOS transceiver for wireless sensor applications. In I International Conference on Electrical Engineering. Coimbra
Publisher
Instituto Superior de Engenharia de Coimbra. Departamento de Engenharia Electrotécnica