关键字:脉冲调相;单片机;计数器;LED数码管
Abstract
Along with the development of the science and technology, the study of phase modulation technology has been applied in more and more fields, for example, in the communication field, multi-channel broadband simulation phase modulation technology, being fully utilized, has played an important role in precision and automation of the multi-channel broadband. The pulse phase modulation, in the medicine domain, which overcomes the speed fuzzy and distance fuzzy difficulty and improves the picture quality and the resolution, provides a theoretical basis for the design of the new generation of imaging system.
The subject introduced principle and the design methods of pulse phase modulator. The pulse phase modulator presented the AT89C51 SCM as the core. The subject studied pulse phase modulation system circuit principle basing on AT89C51 SCM in detail, and designed the software algorithm. Finally I draw the system schematic diagram and the PCB chart, by using Protel99 the SE tool.
The 1st chapter of the paper introduced the meaning of this system; the 2nd chapter proved the design proposal; the 3rd chapter emphatically introduced hardware chip function and characteristic using in the system as well as hardware circuit design; in 4th chapter I dwelled on analyzing the software algorithm design; the 5th chapter was the systematic debugging and the design consummating.
Keywords: Pulse Phase modulation;Single-chip microcomputer(SCM);Counter; LED nixie tube