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本文叙述一种用于高清晰度电视机,办公用录像机及数字式视频摄像机等的优质视频系统10位20MHz A/D转换器。这种新开发的LSI A/D转换器使用标准的两级并行结构,具有自动增益调节和二位数据误差校准功能。同时在芯片内含一个采/保电路。它的制作是采用4.5GHz f_T, 3μm标准双极工艺技术。芯片面积为25mm~2,功耗为900mW。如此低功耗水平是至今为止所报导的最低值的一半左右。这个ADC可在20MHz转换频率下对8.5MHz的视频信号进行数字化处理。它的差动增益误差(DC)为 0.5％,差动相位误差(DP) 0.5度。
This article describes a 10-bit, 20-MHz A / D converter for high-quality video systems for high-definition television, office video recorders, and digital video cameras. The newly developed LSI A / D converter uses a standard two-stage parallel architecture with automatic gain adjustment and two-bit data error calibration. At the same time in the chip contains a mining / Paul circuit. Its production is using 4.5GHz f_T, 3μm standard bipolar process technology. Chip area of 25mm ~ 2, power consumption 900mW. This low power level is about half of the lowest reported so far. The ADC digitizes the 8.5-MHz video signal at a 20-MHz conversion frequency. It has a differential gain error (DC) of 0.5% and a differential phase error (DP) of 0.5 degrees.