High resolution time interval generation system based on FPGA
A time interval, high-resolution technology, applied in general control systems, control/regulation systems, instruments, etc., can solve problems such as high cost, long manufacturing cycle, and inability to meet high-resolution time interval signals, and achieve system stability Good, high-resolution results
Inactive Publication Date: 2013-10-16
XIDIAN UNIV
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Problems solved by technology
The disadvantage of the circuit implemented by ASIC is that its design and manufacturing cycle is quite long, the cost is high, and the cured circuit is difficult to adapt to different application environments.
The existing FPGA-based time interval generation circuit needs to connect all internal logic units through the wiring resources inside the FPGA when the circuit is implemented. In the case of automatic layout and wiring, the amount of wiring delay between logic units cannot be controlled. , which cannot meet the requirements of generating high-resolution time interval signals
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[0041] Reference figure 1 , FPGA-based high-resolution time interval generation system, including host computer 4 and FPGA processing unit, FPGA processing unit has a first frequency-controlled delay chain module 1 and a second frequency-controlled delay chain module 2, reference clock generation module 3 , Data processing module 5, input pulse signal generation module 6 and interval signal generation module 7.
[0042] The FPGA processing unit is selected but not limited to Xilinx Virtex-4, Xilinx Virtex-5 and Xilinx Virtex-6 series FPGA chips, and the present invention chooses Xilinx Virtex-5 series XC5VLX110T chip as an embodiment;
[0043] The first frequency-controlled delay chain module 1 and the second frequency-controlled delay chain module 2 both include a frequency-controlled delay control module 8 and a delay link module 9. The delay is calibrated by the reference clock of the frequency-controlled delay control module 8. The delay amount of each delayer inside each nume...
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The invention provides a high resolution time interval generation system based on FPGA. The system is used to mainly solve a problem that the resolution generated by a time interval signal is low. The system comprises an upper computer (4) and a FPGA processing unit. Two frequency control delay chain modules (1, 2), a reference clock generation module (3), a data processing module (5), an input pulse signal generation module (6) and an interval signal generation module (7) are arranged in the FPGA processing unit. The reference clock generation module generates two reference clocks which are given to the two frequency control delay chain modules respectively. The data processing module are provided with the two frequency control delay chain modules respectively according to a size of the time interval input by the upper computer. The input pulse signal generation module generates an input pulse signal and simultaneously inputs to the two frequency control delay chain modules. The two frequency control delay chain modules output two paths of delay output pulse signals to the interval signal generation module so as to generate a time interval signal. The system of the invention possesses the advantages that the resolution is high; stability is good. The system is used for time frequency measurement.
Description
Technical field [0001] The invention belongs to the technical field of electronic circuits, and relates to an FPGA-based high-resolution time interval generation system, which can be used to generate high-resolution time interval signals in time-frequency measurement. Background technique [0002] Time interval generation technology is widely used in scientific experiment research and engineering practice. In electronic measurement, the key technologies in the calibration of oscilloscopes, signal generators, logic analyzers and semiconductor device testing and short-time timing control all involve precise time interval generation technology. In the field of communications, radar echo simulator systems, phased array radar systems, time digitization systems, and synchronous communication systems all use short time interval signals at the nanosecond or picosecond level; in physics experiments, use flight time In the atomic and molecular physics or chemical physics experiment of the...
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IPC IPC(8): H03K5/14G05B19/042
Inventor 王海梁肖李耀辉朱琼雷一昇陆淦
Owner XIDIAN UNIV