Study on Gate Circuit Multivibrator Based on FPGA

Gate circuit multivibrator is composed of logic gates and RC circuit. When the vibrator is designed based on FPGA, the pulse frequency measured using frequency meter in FPGA is much higher than theoretic analysis value. If this circuit is used as a pulse signal generator, mistakes will be made easil...

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Bibliographic Details
Published in:Journal of physics. Conference series 2019-06, Vol.1237 (4), p.42003
Main Authors: Xie, Yanhui, Zhou, Huanyin, Wen, Qilin, Hu, Jiewei, Xu, Feiyan
Format: Article
Language:English
Subjects:
Circuit design
Error analysis
Field programmable gate arrays
Gates (circuits)
Logic circuits
Multivibrators
RC circuits
Schmitt triggers
Signal generators
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Summary:Gate circuit multivibrator is composed of logic gates and RC circuit. When the vibrator is designed based on FPGA, the pulse frequency measured using frequency meter in FPGA is much higher than theoretic analysis value. If this circuit is used as a pulse signal generator, mistakes will be made easily. In this paper, a gate circuit multivibrator based on FPGA is designed, and its vibrating frequency is measured using the FPGA itself. A frequency error is measured. The reason that causes this error is analyzed, and it is testified through simulation and real signal test. Pulse shaping through Schmitt trigger is an effective solution method. This study shows that clock pulse is very important to FPGA system.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1237/4/042003