| Autor: |
Nguyen, Trung Thanh, Fernandes, Luis André L., Häfliger, Philipp |
| Zdroj: |
IEEE Sensors Journal; Mar2014, Vol. 14 Issue 6, p1836-1843, 8p |
| Abstrakt: |
An implantable transponder with wireless link for biomedical applications is presented. The application specific integrated circuit (ASIC) is energy optimized for a Wheatstone configured piezoresistive pressure sensor. The system takes advantage of an extremely low duty cycle reducing significantly the energy consumption. A net differential input swing voltage is obtained from only a single resistive sensor branch by interchanging the sensor supply polarity alternately. The ASIC was fabricated in TSMC 90 nm CMOS process with an area of 0.37 mm^2 . The transponder is powered by a 13.56 MHz radio frequency signal and performs sensor signal amplification, analog to digital conversion and uplink data transmission through load shift keying within 96 \mus every 5 min. This results in a total energy consumption for the complete system on the implant side of 12.5 nJ per sample for a resolution of 7.03 effective bits. [ABSTRACT FROM PUBLISHER] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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