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公开(公告)号：US09419638B1
公开(公告)日：2016-08-16
申请号：US14727282
申请日：2015-06-01
申请人： NVIDIA CORPORATION
CPC分类号： H03M1/1023 , H03K3/023 , H03M1/002 , H03M1/34 , H03M1/361
摘要： A subsystem configured to implement an analog to digital converter that includes a high speed comparator with an embedded reference voltage level that functions as a calibrated threshold. A calibration element applies power to a reference voltage system. The calibration element then selects a differential analog voltage and applies the differential analog voltage to the inputs of the comparator. A digitally coded signal then configures an array of switches that connect complements of integrated resistors to each input of the comparator so that the switching point of the comparator occurs coincident with the applied differential analog reference voltage, nulling out the effect of the applied differential analog voltage and comparator errors. The calibration element then removes power from the reference voltage system. As a result, the comparator is configured with an embedded threshold that equals the differential analog reference voltage.
摘要翻译： 配置为实现模数转换器的子系统，其包括具有作为校准阈值的嵌入式参考电压电平的高速比较器。 校准元件将功率施加到参考电压系统。 校准元件然后选择差分模拟电压，并将差分模拟电压施加到比较器的输入端。 然后，数字编码信号配置一组开关，将集成电阻器的补码连接到比较器的每个输入，使得比较器的开关点与所应用的差分模拟参考电压一致，消除所应用的差分模拟电压的影响 和比较器错误。 然后校准元件从参考电压系统中去除功率。 因此，比较器配置有等于差分模拟参考电压的嵌入式阈值。
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公开(公告)号：US09825642B2
公开(公告)日：2017-11-21
申请号：US15237565
申请日：2016-08-15
申请人： NVIDIA CORPORATION
CPC分类号： H03M1/1023 , H03K3/023 , H03M1/002 , H03M1/34 , H03M1/361
摘要： A subsystem configured to implement an analog to digital converter that includes a high speed comparator with an embedded reference voltage level that functions as a calibrated threshold. A calibration element applies power to a reference voltage system. The calibration element then selects a differential analog voltage and applies the differential analog voltage to the inputs of the comparator. A digitally coded signal then configures an array of switches that connect complements of integrated resistors to each input of the comparator so that the switching point of the comparator occurs coincident with the applied differential analog reference voltage, nulling out the effect of the applied differential analog voltage and comparator errors. The calibration element then removes power from the reference voltage system. As a result, the comparator is configured with an embedded threshold that equals the differential analog reference voltage.
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