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PROGRAMMABLE TRIM FILTER FOR SUCCESSIVE APPROXIMATION REGISTER ANALOG TO DIGITAL CONVERTER COMPARATOR
PROGRAMMABLE TRIM FILTER FOR SUCCESSIVE APPROXIMATION REGISTER ANALOG TO DIGITAL CONVERTER COMPARATOR
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机译:可编程TRIM滤波器,用于将模拟量成功逼近为数字转换器比较器
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摘要
The disclosure includes a successive approximation register (SAR) analog to digital converter (ADC). The SAR ADC includes a sampling network to store a sample of an analog signal. The SAR ADC also includes a comparator to successively compare the sample to reference values to determine a digital value corresponding to the sample of the analog signal. The comparator employs a plurality of comparator preamplifiers. The comparator also includes a programmable trim filter. The programmable trim filter is selectively set to adjust a bandwidth of the comparator preamplifiers to a bandwidth value corresponding with a preamplifier settling time subceeding a preamplifier settling threshold.
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机译:本公开包括逐次逼近寄存器(SAR)模数转换器(ADC)。 SAR ADC包括一个采样网络,用于存储模拟信号的样本。 SAR ADC还包括一个比较器,用于将样本与参考值进行连续比较,以确定对应于模拟信号样本的数字值。比较器采用多个比较器前置放大器。比较器还包括一个可编程的微调滤波器。可编程修整滤波器被选择性地设置为将比较器前置放大器的带宽调整为与在前置放大器建立阈值之后的前置放大器建立时间相对应的带宽值。
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