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发明授权
CN105227186B 模数转换器以及流水线模数转换器 失效 - 权利终止

模数转换器以及流水线模数转换器
摘要：
本发明提供一种模数转换器以及流水线模数转换器。该模数转换器包括第一比较电路、第二比较电路、采样电压提供电路和编码器电路，采样电压提供电路用于为第一比较电路提供第一组比较电压，为第二比较电路提供第二组比较电压；第一比较电路用于在第一组比较电压中的各第一比较电压下，对模拟信号输入量进行比较处理并输出第一比较数字量；第二比较电路用于根据第一比较数字量从第二组比较电压中选择对应的第二比较电压，在选择的各第二比较电压下对模拟信号输入量进行比较处理并输出第二比较数字量；编码器电路用于对第一比较数字量和第二比较数字量进行编码。本发明技术方案可有效减少模数转换器中比较器的使用数量，降低电路功耗。
摘要（英）：

An analog-to-digital converter is provided. The analog-to-digital converter includes a sampling-voltage providing circuit, a first comparison circuit, a second comparison circuit, and an encoder circuit. The sampling-voltage providing circuit provides a group of first comparison voltages and a group of second comparison voltages. The first comparison circuit performs a first comparison operation to an analog-signal input quantity according to the group of first comparison voltages to generate a first comparison digital quantity. The second comparison circuit selects second comparison voltages among the group of second comparison voltages according to the first comparison digital quantity and performs a second comparison operation to the analog-signal input quantity according to the selected second comparison voltages to generate a second comparison digital quantity. The encoder circuit encodes the first comparison digital quantity and the second comparison digital quantity and generates a digital quantity corresponding to the analog-signal input quantity.

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