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This paper describes a comparator block fabricated in 0.18um CMOS process. The comparator block composed of transimpedance amplifier(TIA) as a preamplifier and comparator with hysteresis. The regulated cascode(RGC) structure TIA is used as a preamplifier. The measured results provide 79dBΩ transimpedance gain, 148MHz −3dB bandwidth for a 0.5pF photodiode capacitance and 6.3mW power consumption for...
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