| Títol: | A highly-accurate low-power CMOS potentiostat for implantable biosensors |
| Autor: | Razzaghpour, Milad
Rodriguez Duenas, Saul
Alarcón Cot, Eduardo José
Rusu, Ana |
| Altres autors/autores: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica |
| Editorial: | IEEE |
| Matèries: | Àrees temàtiques de la UPC::Enginyeria electrònica i telecomunicacions::Microelectrònica::Circuits integrats
Integrated circuits
Circuits integrats |
| Tipus de document: | Conference report |
| Descripció: | Current-mirror-based potentiostats suffer from systematic and random errors causing offset, gain and linearity error in reading out the sensor data. In this work, a new potentiostat topology is proposed to eliminate the systematic error via an error-cancellation loop. The loop takes advantage of an error-tracking amplifier connected to a transimpedance amplifier with adjustable input common-mode voltage. Due to the enhanced loop gain, the potentiostat is able to accurately copy the sensor current which will then be converted into the proportional voltage. Additionally, a theoretical discussion of the proposed topology is given and a thorough study on the effect of random error sources is carried out. The potentiostat is designed and simulated in a 150nm CMOS process. The results verify a highly-linear highly-accurate performance in a low-noise condition, while consuming only 32 μW. |
| Altres identificadors i accés: | Razzaghpour, M. [et al.]. A highly-accurate low-power CMOS potentiostat for implantable biosensors. A: IEEE Biomedical Circuits and Systems Conference (BioCAS). "2011 IEEE Biomedical Circuits and Systems Conference (BioCAS)". San Diego, California: IEEE, 2011, p. 5-8.
http://hdl.handle.net/2117/14812
10.1109/BioCAS.2011.6107713 |
| Disponible al dipòsit: | E-prints UPC
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