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US07075465B2 Comparator offset calibration for A/D converters 失效
A / D转换器的比较器偏移校准

Comparator offset calibration for A/D converters
Abstract:
An A/D converter includes at least one comparator array (COMP1–COMP7) for flash A/D conversion of an analog signal. Means (CCU, SW1–SW7) provide, for each comparator in the array, a common reference signal to both comparator input terminals. Means (CCU, DAC1–DAC7) force each compara-tor in the array into the same logical output state. Finally, means (CCU, DAC1–DAC7) adjust the comparator trip-point for each comparator by a ramp signal until the logical output state is inverted.
Abstract(Chinese):

A / D转换器包括用于模拟信号的闪存A / D转换的至少一个比较器阵列（COMP 1 -COMP 7）。 方法（CCU，SW 1 -SW 7）为阵列中的每个比较器提供对两个比较器输入端子的公共参考信号。 方法（CCU，DAC 1 -DAC 7）将阵列中的每个比较器强制为相同的逻辑输出状态。 最后，方法（CCU，DAC 1 -DAC 7）通过斜坡信号调整每个比较器的比较器跳变点，直到逻辑输出状态反转。

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