Time-to-digital converter using time residue feedback and related method

申请号 US15643465 申请日 2017-07-06 公开(公告)号 US09904253B1 公开(公告)日 2018-02-27
申请人 Terng-Yin Hsu; Chi-Hsu Chen; Jung-Chin Lai; Hsiang-Ming Yen; 发明人 Terng-Yin Hsu; Chi-Hsu Chen; Jung-Chin Lai; Hsiang-Ming Yen;
摘要 A method and apparatus for measuring an elapsed time from a starting signal to an ending signal in a time-to-digital converter. Primarily, the invention calculates an amount of complete cycles from the starting signal to a starting edge of a next clock cycle or the next Nth clock cycle (N is a natural number great than one) after the clock cycle corresponding to the ending signal. The amount is multiplied by a cycle time of the coarse clock to obtain a coarse time value. A time residue is calculated from the ending signal to the starting edge. Finally, the time residue is subtracted from the coarse time value to obtain a required time.
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