TY - GEN
T1 - Power harvesting and telemetry in CMOS for implanted devices
AU - Sauer, Christian
AU - Stanacevic, Milutin
AU - Cauwenberghs, Gert
AU - Thakor, Nitish
PY - 2004/12/1
Y1 - 2004/12/1
N2 - Implanted sensors offer many advantages to those studying the behavior of the human body. Unfortunately, the need to power and communicate with devices often requires tradeoffs that compromise their usefulness. We describe a power harvesting and telemetry chip that allows operation without wires or batteries. The chip has been fabricated in 0.5μm CMOS. The chip is able to supply 2mA at 3.3 V to associated sensors using inductive coupling. Tests reveal the characteristics of this chip under different loads and at different distances from the transmission coil. With the preliminary coils, functionality could be maintained with over 28mm between the two coils. To evaluate the performance of the chip in conditions mimicking implantation in the body, water bearing colloids were introduced between the two coils. This resulted in a small loss of transfer efficiency, with no change in the behavior of the chip.
AB - Implanted sensors offer many advantages to those studying the behavior of the human body. Unfortunately, the need to power and communicate with devices often requires tradeoffs that compromise their usefulness. We describe a power harvesting and telemetry chip that allows operation without wires or batteries. The chip has been fabricated in 0.5μm CMOS. The chip is able to supply 2mA at 3.3 V to associated sensors using inductive coupling. Tests reveal the characteristics of this chip under different loads and at different distances from the transmission coil. With the preliminary coils, functionality could be maintained with over 28mm between the two coils. To evaluate the performance of the chip in conditions mimicking implantation in the body, water bearing colloids were introduced between the two coils. This resulted in a small loss of transfer efficiency, with no change in the behavior of the chip.
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M3 - Conference contribution
AN - SCOPUS:28244488148
SN - 0780386655
SN - 9780780386655
T3 - 2004 IEEE International Workshop on Biomedical Circuits and Systems
SP - S1.8-S1.4
BT - 2004 IEEE International Workshop on Biomedical Circuits and Systems
T2 - 2004 IEEE International Workshop on Biomedical Circuits and Systems
Y2 - 1 December 2004 through 3 December 2004
ER -