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Time to digital converter
Published:
2022-01-10
The utility model discloses a time digital converter comprising: a measurement control circuit unit, a fine count interface unit, a fine count unit, a coarse count unit, a calibration unit, an internal register unit and a post-processing unit, the fine count unit comprising a circular delay chain
The utility model discloses a time digital converter comprising: a measurement control circuit unit, a fine count interface unit, a fine count unit, a coarse count unit, a calibration unit, an internal register unit and a post-processing unit, the fine count unit comprising a circular delay chain, a double edge counter, a fine count latch and a priority encoder; the circular delay chain comprises a set of logic gates located at the top left of the chip with gates and at least eight non-logical gates located at other positions, said logic gates being arranged in a mouth shape and connected at the beginning and end. The time digital converter of the utility model can accurately measure the time interval between the start pulse signal and the stop pulse signal and can meet the performance requirements of high precision and large range at the same time, and the time digital converter takes up little space and has little deviation.
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