Title：High-speed counting and comparing circuit and method
Country：China
Patent No.：201911215985.9
Legal Status：Authorized
Inventor：Chen Jia, Ziqiang Wang, Chun Zhang, Lei Quan, Cheng Fang, Yongsheng Yin, 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：2019-12-02
Issue Date：2023-03-24
Abstract：
The invention discloses a high-speed counting and comparing circuit and a method thereof. The circuit comprises a low-frequency counter, a high-frequency counter, an enabling control module, a clock frequency divider and a counting preset value distribution module, when the external counting enable signal is started, preset default values of the low-frequency counter and the high-frequency counterare set according to the preset default input value; when the internal counting enable signal is valid, the low-frequency counter starts counting; when the low-frequency counter completes signal validity, the high-frequency counter starts counting; and when the high-frequency counter completes signal validity, the control enable signal is valid, the internal counting enable signal is invalid, andthe low-frequency counter and the high-frequency counter are reset at the same time. According to the invention, the clock frequency of the counter can be reduced, and the complexity of the combinational logic circuit is reduced, so that the high performance of the circuit is realized under a low-node process condition.
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