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Method and apparatus for dynamically controlling the timing of signals in automatic test systems
Method and apparatus for dynamically controlling the timing of signals in automatic test systems
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机译:在自动测试系统中动态控制信号时序的方法和装置
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摘要
Apparatus for delaying an electrical signal includes a sequence of stages, each for delaying the signal. A coarser stage delays the signal by multiples of a predetermined fundamental delay interval and a finer stage provides for fine adjustment of the delay. The fine stage includes an integral number N of delay elements, the total providing a delay interval greater than the fundamental delay interval, whereby the fine delay intervals compensate for fabrication tolerances to enable accurate calibration of the combined system by post-fabrication measurement. In one implementation each delay stage includes a tapped transmission line to provide delay intervals, in another a ramp generator is used.
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