TDC circuit and measurement method based on bidirectional operation annular carry chain

• Main Authors: CUI KE, ZHANG LEI, WANG HAILIN, QIAN JIEYU, SHI JIABIN, REN ZHONGJIE
• Format: Patent
• Language: Chinese; English
• Published: 29.11.2019
• Subjects: HOROLOGY; PHYSICS; TIME-INTERVAL MEASURING

The invention discloses a TDC circuit and measurement method based on a bidirectional operation loop carry chain. The circuit comprises a standard delay line channel, a non-standard delay line channeland a time analysis module, and each of the two delay line channels comprise four sub-modules, namely a time extraction sub-module, a coarse timing sub-module, a fine timing sub-module and a timestamp combination sub-module. The method comprises the following steps that in the standard delay line channel, a measured signal is spread along a slow delay line, a coarse timing clock signal is spreadalong a fast delay line, and the fine timing sub-module calculates a time interval between the measured signal and the coarse timing clock signal and transmits the time interval to the timestamp combination sub-module; in the non-standard delay line channel, a measured signal is spread along a fast delay line, a coarse timing clock signal is spread along a slow delay line, and the fine timing sub-module calculates a time i