公开(公告)号：US20090045994A1

公开(公告)日：2009-02-19

申请号：US12192369

申请日：2008-08-15

申请人： Michael DRUMMY ,  Andrew THOMAS ,  Denys LAQUERRE ,  David LAROCHELLE ,  Pierre LANGLOIS ,  Steven BESSER

发明人： Michael DRUMMY ,  Andrew THOMAS ,  Denys LAQUERRE ,  David LAROCHELLE ,  Pierre LANGLOIS ,  Steven BESSER

IPC分类号： H03M1/12

CPC分类号： G01R19/2509 ,  G01N29/262 ,  G01N29/44

摘要： A multiple mode digitization system for a non-destructive inspection instrument which makes use of a multiplexing circuit and a single set of analog to digital converters to efficiently digitize analog test signals from a plurality of inputs. In the preferred embodiment, each of the analog to digital converters in the system is driven with an independent and separate clock signal, allowing for propagation delay compensation among the plurality of test signals as well as interleaved sampling such that custom sampling rates can be used for each input without the need for more than one clock frequency. In an alternate embodiment, phase adjustments on the sampling clocks are used only for interleave sampling, and digital filters are used to provide signal propagation delay compensation.

摘要翻译： 一种用于非破坏性检查仪器的多模式数字化系统，其利用多路复用电路和单组模数转换器来有效地数字化来自多个输入的模拟测试信号。 在优选实施例中，系统中的每个模数转换器都用独立和分离的时钟信号驱动，允许多个测试信号之间的传播延迟补偿以及交错采样，使得定制采样速率可用于 每个输入不需要多于一个时钟频率。 在替代实施例中，采样时钟上的相位调整仅用于交织采样，并且使用数字滤波器来提供信号传播延迟补偿。