A CONTINUOUS-TIME FIRST ORDER Σ-Δ CONVERTER WITH OFFSET CALIBRATION FOR BIOLOGICAL APPLICATION
Abstract
In the present paper, a continuous time Σ?-Δ 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 Σ?-Δ 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%.
Event details
- Event
- IWADC 2011
- Technical Committee
- TC4
- Place
- Orvieto, ITALY
- Time
- 30 June 2011 - 1 July 2011
- Website
- http://www.iwadc2011.diei.unipg.it/Sito/IWADC2011.html