IJTAG-based Fault Recovery and Robust Microelectrode-Cell Design for MEDA Biochips

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IEEE A digital microfluidic biochip (DMFB) is an attractive platform for immunoassays, point-of-care clinical diagnostics, DNA sequencing, and other laboratory procedures in biochemistry. A recent generation of biochips uses a micro-electrode-dot-array (MEDA) architecture, which provides fine-grained controllability of droplets and seamlessly integrates microelectronics and microfluidics using CMOS technology. In order to ensure robust fluidic operations and high confidence in the outcome of biochemical experiments, chip testing, fault diagnosis and fault recovery are critical for MEDA biochips. In this paper, we present an effective fault-recovery solution based on the homogeneous structure of MEDA. Since the microelectrode cell (MCs) in a MEDA biochip are identical, we add multiplexers for reconfigurability, whereby an MC with faulty components can use the hardware resources in a neighboring MC. In addition, we use the IEEE 1687 (a.k.a. IJTAG) network to reduce the number of control signals needed for the multiplexers, and to provide flexible sub-scan chain access for the fault-recovery control flow. A comprehensive set of simulation results demonstrates the effectiveness of the proposed fault-recovery solution for MEDA biochips.

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Cited Authors

  • Zhong, Z; Chakrabarty, K

Published Date

  • January 1, 2020

Published In

Electronic International Standard Serial Number (EISSN)

  • 1937-4151

International Standard Serial Number (ISSN)

  • 0278-0070

Digital Object Identifier (DOI)

  • 10.1109/TCAD.2020.2986741

Citation Source

  • Scopus