Triple modular redundancy (TMR) is widely used in FPGA/ASIC circuits to protect circuits against single event upsets (SEUs). However, because of the interference of metastability on signal transmission across clock domains, the TMR circuits' capability against SEUs is reduced greatly. In order to solve this problem, a cross-clock transmission solution which could be applied in TMR circuits are presented. In addition, simulationbased verification which combined protocol assertions, metastable injection and forced inversion is proposed to succeed in verifying the availability of the solution based on TMR circuits.
This article base on FPGA and full HD video conversion chip AD9889B, designed and implemented an HDMI image acquisition and display module suitable for industrial cameras. FPGA configure the AD9889B chip through IIC way, the parallel original HD digital video signals inputted from image acquisition front-end of industrial cameras is encoded into the desired video format with AD9889B. Finally realizes the HD digital video is outputted through HDMI interface.
In this paper, based on the FPGA and with a video dedicated A / D converter chip, LVDS coding chip, the design and implementation of a SD(standard-definition) analog video signals to HD(high-definition) digital video signal converter. First, input SD analog video into digital video signals meet the ITU-BT656 standard. Then use the FPGA with the video processing chip and DDR do some corresponding processing to achieve high-definition digital video output. After the actual test, the converter output signal of the image quality is well, meets the design requirements, and to verify the effectiveness of the program.
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