In the present paper, a continuous time converter for biological application is presented. The implemented ASIC has been designed for reading piezo-resistive MEMS cantilever used as DNA detector. The readout channel consists of a first analog front-end circuit able to reduce possible input offset and electronic mismatch, followed by a continuous-time 9b first order S-D converter for digital conversion. Simulation results show a circuit accuracy on the measurement of resistance variation in the order of 10 ppm within a maximum range of 10%.
A continuous-time S-D converter with offset calibration for biological application
Borghetti, Fausto;Massari, Nicola;Stoppa, David;Adami, Andrea;Lorenzelli, Leandro
2011-01-01
Abstract
In the present paper, a continuous time converter for biological application is presented. The implemented ASIC has been designed for reading piezo-resistive MEMS cantilever used as DNA detector. The readout channel consists of a first analog front-end circuit able to reduce possible input offset and electronic mismatch, followed by a continuous-time 9b first order S-D converter for digital conversion. Simulation results show a circuit accuracy on the measurement of resistance variation in the order of 10 ppm within a maximum range of 10%.File in questo prodotto:
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