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A High-Density Ternary Barcode Detection System with a Dual-Bias Differential Method
Journal of sensor technology
A dual-bias differential method is presented for increasing the detection range of a ternary barcode detection system. The system is provided with a second differential delay circuit with bias control to process optimally gray signals by lowering their averaged level using a clamping circuit. This is added to the primary conventional differential delay circuit without bias control and a comparator to process optimally black signals based on the envelope-differential fixed-period delay (EDFPD)doi:10.4236/jst.2013.31002 fatcat:ybhfbthi2bd6jgfeokatssrbv4