They can use the key to lock cell phone jammer

They can use the key to lock cell phone jammer .
Write to the paper outline writing the first draft, every step you need to really seriously do. Virtually we have learned a lot, we should be independent as a graduates complete their Bachelor thesis, which is a kind of exercise. Laser head technology has lagged behind Japan and other developed countries, I chose this topic is not just related to my work, more importantly, I hope there are more people concerned about the study in this area, I hope China is not just most populous country, is the technical power, and hope that China will have their own patents for inventions, hope to the world of DVD manufacturers to pay royalties, and hope that China will be stronger in the future. Therefore, others can not use cell phone jammer .
LD constant current source thesis: the single-mode semiconductor laser pump source digital drive design. Medical, optical communications, materials processing, weapons and equipment, high power semiconductor laser (LD) plays an extremely important role, its application has become the countries competing research focus. Ideal pump sources of erbium-doped fiber amplifier (EDFA) - high power 980nnm mode semiconductor laser works, performance analysis, involved in the digitization of the semiconductor laser drive circuit design, temperature control circuit design digital control design techniques are studied. In this paper, the current sampling of the digital zoom negative feedback constant current architecture, designed based on a low-loss CNC constant current circuit, significantly improves the efficiency of the driving source. Especially the child can not use cell phone jammer .Many things might happen during the shipping process of  cell phone jammer
For two systems of integrated TEC and non-integrated TEC temperature control, the use of fuzzy PID algorithm to ensure that the laser working in a stable constant temperature, and to achieve control of the digital display interface; analysis 980nnm single-mode semiconductor laser output characteristics and load characteristics, On this basis, the design of laser protection circuit implementation of the static, and the overcurrent protection. Summary. Article, for example, a "low ripple and low noise semiconductor laser power" of the design process knowledge and design process of the semiconductor laser power, this article is designed to allow in-depth understanding of the usefulness of the semiconductor laser power.