TY - JOUR SN - 1530437X EP - 617 AV - none TI - Two-stage interface circuit design for a 32-color resolution optical sensor SP - 610 N1 - cited By 2 Y1 - 2013/// VL - 13 JF - IEEE Sensors Journal A1 - Assaad, M. A1 - Yohannes, I. A1 - Bermak, A. UR - https://www.scopus.com/inward/record.uri?eid=2-s2.0-84872297914&doi=10.1109%2fJSEN.2012.2224331&partnerID=40&md5=b2921eb715dd96dc065ba3e0e6651c52 ID - scholars3765 KW - Biasing current; Higher resolution; Integrated solutions; Interface circuits; Mixed signal; Off-the-shelf components; On-chip integration; Proof of concept; Single-chip; Small area; Storage units; Supply voltages KW - Design; Optical sensors; Organic pollutants; Polychlorinated biphenyls KW - Logic circuits N2 - An interface circuit design for an optical sensor based on a two-stage cascaded architecture is presented in this paper. The proposed design is a mixed signal solution that provides few advantages in terms of speed, power consumption, higher resolution with smaller number of storage units, and small area for future on-chip integration. Simulation and experimental results for five bits resolution (32 levels) are presented to validate the design. We are aiming for a single-chip integrated solution; however, for a quick proof of concept, the proposed design has been implemented as a PCB using discrete off-the-shelf components. The biasing current and power consumption from the PCB implementation are 192 mA and 1.3 W, respectively, at a 6.75-V supply voltage. © 2001-2012 IEEE. IS - 2 ER -