Title：A modulator and its delay automatic calibration circuit and a delay control module
Country：China
Patent No.：201610058072.0
Legal Status：Authorized
Inventor：Woogeun Rhee, Xiaoyong Li, Wen Jia, Zhihua Wang
Assignee：Research Institute of Tsinghua University in Shenzhen
Address：Room A302, Research Institute of Tsinghua University in Shenzhen, the Southern District of the High-tech Industrial Park, Nanshan District, Shenzhen 518057, Guangdong
Filing Date：2016-01-28
Issue Date：2018-10-09
Abstract：
A time delay control module comprises a time-to-digital converter, a phase error magnitude calculation unit and a control unit, wherein the time-to-digital converter is used for converting phase errors of a reference clock signal and a feedback clock signal into a digital value; the phase error magnitude calculation unit is used for acquiring multiple digital values continuously outputted by the time-to-digital converter and calculating fluctuation amplitude values of the acquired multiple digital values; and the control unit is used for generating multiple different time delay signals and selecting the best time delay signal according to the received fluctuation amplitude values. The invention also provides a modulator provided with the time delay control module and a time delay automatic calibration circuit thereof. According to the modulator and the time delay automatic calibration circuit and the time delay control module thereof provided by the embodiment of the invention, low pass branch time delay and high pass branch time delay of the modulator are matched, and thus the quality of signals outputted by the modulator is improved.
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