An implantable low power mixed signal telemetry chip for measurements of the frequency dependent impedance of transplanted kidneys for rejection control Export

@inproceedings{citeulike:3855461, abstract = {The paper presents a low power mixed signal telemetry chip for measurements of the frequency dependent impedance of transplanted kidneys. The purpose of this chip is to observe in vivo, if there is any correlation between the impedance of the organic tissue and its healing or rejection process. In the case of correlation new diagnostic principles are possible. The chip consists of both a digital and an analog part. The digital part is mainly dedicated to the communication protocol. It includes also the power management with clock switches and power down signals according to the Petri net principle. The analog part generates the stimulating harmonic signal with the help of piecewise linear (PWL) sine functions, PWL is realized by switching four differently sized output transistors at a 16 times oversampling rate. The imaginary and real part of the impedance are measured by the four-probe method. An 8 bit analog to digital converter and a multifunctional digitally controlled sample-and-hold circuit are also implemented}, author = {Arnold, R. and Manck, O.}, booktitle = {Proc. of the IEEE Dallas CAS Workshop}, citeulike-article-id = {3855461}, citeulike-linkout-0 = {http://dx.doi.org/10.1109/DCAS.2001.920982}, citeulike-linkout-1 = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=920982}, comment = {EIS App: Monitor kidney transplant in vivo IS Impl. Details: Appears to use chopping to perform FRA; 100 - 1MHz for Z = 100 to 20k Ohms; Very little IS information given Focus is more on signal generator}, doi = {10.1109/DCAS.2001.920982}, journal = {Low Power/Low Voltage Mixed-Signal Circuits and Systems, 2001. (DCAS-01). Proceedings of the IEEE 2nd Dallas CAS Workshop on}, keywords = {fra, impedance, signal\_gen}, pages = {3--6}, posted-at = {2009-01-06 23:38:02}, priority = {0}, title = {An implantable low power mixed signal telemetry chip for measurements of the frequency dependent impedance of transplanted kidneys for rejection control}, url = {http://dx.doi.org/10.1109/DCAS.2001.920982}, year = {2001} }

TY - CONF ID - citeulike:3855461 L3 - citeulike-article-id:3855461 N2 - The paper presents a low power mixed signal telemetry chip for measurements of the frequency dependent impedance of transplanted kidneys. The purpose of this chip is to observe in vivo, if there is any correlation between the impedance of the organic tissue and its healing or rejection process. In the case of correlation new diagnostic principles are possible. The chip consists of both a digital and an analog part. The digital part is mainly dedicated to the communication protocol. It includes also the power management with clock switches and power down signals according to the Petri net principle. The analog part generates the stimulating harmonic signal with the help of piecewise linear (PWL) sine functions, PWL is realized by switching four differently sized output transistors at a 16 times oversampling rate. The imaginary and real part of the impedance are measured by the four-probe method. An 8 bit analog to digital converter and a multifunctional digitally controlled sample-and-hold circuit are also implemented JF - Low Power/Low Voltage Mixed-Signal Circuits and Systems, 2001. (DCAS-01). Proceedings of the IEEE 2nd Dallas CAS Workshop on EP - 6 TI - An implantable low power mixed signal telemetry chip for measurements of the frequency dependent impedance of transplanted kidneys for rejection control T2 - Proc. of the IEEE Dallas CAS Workshop SP - 3 KW - fra KW - impedance KW - signal_gen N1 - EIS App: Monitor kidney transplant in vivo IS Impl. Details: Appears to use chopping to perform FRA; 100 - 1MHz for Z = 100 to 20k Ohms; Very little IS information given Focus is more on signal generator AU - Arnold, R AU - Manck, O PY - 2001/// UR - http://dx.doi.org/10.1109/DCAS.2001.920982 ER -