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Successive approximation type analog/digital converter and operation method of successive approximation type analog/digital converter
Successive approximation type analog/digital converter and operation method of successive approximation type analog/digital converter
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机译:逐次逼近型模/数转换器和逐次逼近型模/数转换器的操作方法
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摘要
In a successive approximation-type A/D converter, an S/H circuit samples and holds an analog input voltage. A D/A converter section receives current digital data corresponding to a current search voltage range, and outputs a plurality of comparison voltages based on the current digital data. A comparator section performs parallel comparison in which the held analog input voltage is compared with each of the plurality of comparison voltages. A successive approximation register section outputs digital data for a next search voltage range within the current search voltage range as the current digital data to the digital-to-analog converter section based on a result of the parallel comparison using the current search voltage range. A timing control circuit generates a switching signal from the parallel comparison to a redundant comparison such that the redundant comparison is performed.
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机译:在逐次逼近型A / D转换器中,S / H电路采样并保持模拟输入电压。 D / A转换器部分接收与当前搜索电压范围相对应的当前数字数据,并基于当前数字数据输出多个比较电压。比较器部分执行并行比较,其中将保持的模拟输入电压与多个比较电压中的每个比较。逐次逼近寄存器部分基于使用当前搜索电压范围的并行比较的结果,将当前搜索电压范围内的下一个搜索电压范围的数字数据作为当前数字数据输出到数模转换器部分。时序控制电路从并行比较到冗余比较生成切换信号,从而执行冗余比较。
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