Abstract
This article presents a new configurable wireless sensor system. The system is used to perform amperometric measurements and send the measurement data to a handheld reader using a wireless transponder interface. The two-chip sensor system was implemented in a 0.35 μm CMOS technology. The system consists of an integrated nano-potentiostat that performs the actual measurements and an ISO 18000-3 compliant frontend that enables wireless telemetric data transmission and powering of the entire sensor system. The system was manufactured in combination with a chronoamperometric glucose sensor which allows the measurement of the glucose content in tear fluid and thus a non-invasive determination of the blood sugar level. For a range of sensor currents from 0.1 μA to 10 μA, the potentiostat achieved an accuracy of better than 5 % with a total power dissipation of less than 600 μW. With the realized antenna geometry a wireless communication distance of more than 7 cm has been achieved.
Highlights
For a wide range of applications, such as environmental measurement, process control, and biomedical monitoring, electrochemical sensors converting the chemical concentration into an electrical signal are used
The resulting average power dissipation is approx. 50 μW. Both ASICs are manufactured in Fraunhofer IMS 0.35 μm CMOS technology
The digital part the potentiostat is responsible for the execution the startup procedure of Before characterizing the of entire system, validating simulations were of performed
Summary
For a wide range of applications, such as environmental measurement, process control, and biomedical monitoring, electrochemical sensors converting the chemical concentration into an electrical signal are used. The food article industry includes is interested an in the determination of Xanthan concentrations as these are indicators of the freshness of fish and meat measuring circuit and, a digital part including an EEPROM, and a SPI slave interface. Microsystem demonstrates to miniaturize in otherThis biomedical applications and to providethe theability possibility of combining glucose several measuring with one communication interface [6] which makes the system expandable and levels in the tool. It can bemeasuring used assensors a non-invasive glucometer for continuous monitoring of glucose configurable.
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