Analog VLSI and neural systems
Analog VLSI and neural systems
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This paper proposes and demonstrates novel types of vision chips that utilize pulse trains for image processing. Two types of chips were designed using 1.2 碌m double-metal double-poly CMOS process; one is based on a pulse width modulation (PWM) and the other is based on a pulse frequency modulation (PFM). In both chips the interaction between the pixels were introduced to realize the image pre-processing. The basic experimental and simulation results are shown for the PWM and PFM chips, respectively. Also the comparison between two types is discussed.