Digitizer for a bar code reader utilizing a first derivative signal and an analog ground comparison signal
作者： Edward Barkan
DOI:
关键词: Electrical engineering 、 Analog signal processing 、 Signal 、 Digital signal 、 Analog multiplier 、 Analog signal 、 Signal transfer function 、 Engineering 、 Analog device 、 Analog transmission
摘要: A system for digitizing an analog electric signal generated from the photoelectronic conversion of reflected light when scanning indicia having spatially-separated, light-reflective portions, including a differentiator circuit generating first derivative representing signal. An ground comparison compares and to generate output indicating change in intensity light. generates digital corresponding
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