发明名称 |
Data acquisition system and method with a selectable sampling rate |
摘要 |
An improved data acquisition system for digitizing and storing analog data at a selectable sample rate. The analog data signal is first digitized at a rate defined by a high-frequency clock signal. A decelerator collects every N digital data samples and outputs the samples to N memory partitions at a reduced rate equal to the original clock frequency divided by N. The N memory partitions are further configured to receive N store-enable signals corresponding to each of the N digital data samples. Each of the N store-enable signals determines whether a memory partition will store the corresponding digital data sample. By choosing an appropriate pattern for the N store-enable signals, only a portion of the generated digital data signals is stored in memory. This results in a selectable effective sampling rate for the analog data.
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申请公布号 |
US6166673(A) |
申请公布日期 |
2000.12.26 |
申请号 |
US19980162678 |
申请日期 |
1998.09.29 |
申请人 |
NATIONAL INSTRUMENTS CORPORATION |
发明人 |
ODOM, B. KEITH |
分类号 |
G11C7/16;(IPC1-7):H03M1/12 |
主分类号 |
G11C7/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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