【正文】 s main business, not in China to use very few people. (7)Medium scale ATMEL: PLD did well. ATMEL did some Xilinx patible with Altera and movies, but on quality and original manufacturers still has some gaps, in high reliability products use less, multipurpose at the low end products. (8) Clear Logic: PLD/FPGA big pany patible chips which can be your design, not programming, onetime cure batch production cost is low. (9)the WSI: production PSD (SCM programmable peripheral chip) products. This is a special kind of PLD, such as the latest PSD8xx, PSD9xx integrated PLD, an EPROM, Flash, and to support the ISP (online programming), integration, mainly used for high with singlechip work. BTW: PLD (programmable logic device) is a kind of can replace pletely 74 series and GAL, the PLA39。s develops very quickly. The main products are: MAX3000/7000, FELX6K / 10K, APEX20K, ACEX1K, Stratix etc. Its development tools MAX + PLUS II is more successful PLD development platform, the latest again launched Quartus II development software. Altera pany provides more forms of design input method, binding thirdparty VHDL prehensive tools, such as: integrated software FPGA Express, such ModelSim Leonard, simulation software. (2)the inventor of the ILINX: FPGA. Product categories with plete, basically have: XC9500/4000, Coolrunner (XPLA3), Spartan, Vertex etc series, its biggest Vertex II Pro device has reached eight million door. Develop software for the Foundation and ISE. Generally speaking, people in Europe with Xilinx, in Japan and the asiapacific region, with ALTERA more people in the United States is equal shares. Global PLD/FPGA products by 60% is Altera and Xilinx provide. Can speak and Altera Xilinx together determine PLD technology development direction. (3)Vantis: Lattice is Lattice ISP (In) technical Programmability System inventors. The ISP technology greatly promoted the development of the product, and PLD XILINX ALTERA and pared, its development tools than ALTERA and XILINX lower. Medium scale PLD more characteristics, largescale PLD petitiveness quite good enough (Lattice no based on lookup table technology of largescale FPGA), 1999 launch programmable analog device, 1999 acquisition Vantis (original AMD affiliates), the thirdleading programmable logic device supplier. December 2021 acquisition Agere pany (formerly Lucent microelectronics department) FPGA department. The main products are ispLSI2021/5,000/8,000, MACH4/5. (4)ACTEL: the melting wire (onetime burning) PLD leader. Because the melting silk PLD resist radiation resistant, high temperature, low power consumption, high speed, so in their military and aerospace level there is great advantage. ALTERA and is generally not sortie XILINX military and aerospace level market. (5)Quicklogic: professional PLD/FPGA pany, by the disposable anti melt silk process is given priority to, in China39。 Gate Ensemble Gate arrays wiring manometers。s huada pany also provide ASIC design software (panda 2021)。 Modeling, simulation and prototyping, Application development, Graphical user interface design, etc. MATLAB product family are widely used in signal and image processing, control system design, munication system simulation, etc. Open the structure of the MATLAB product family easily specific requirements for expansion, in order to deepen the understanding of the problems at the same time, to improve their own petitiveness. PCB design software PCB Board (maritime the vehicle) design software is a lot of more phyletic, such as Protel, OrCAD, Viewlogic, PowerPCB Cadence PSD, MentorGraphices, the Expedition PCB, Zuken CadStart, Winboard/Windraft/Ivex SPICE, PCB Studio, TANGO, PCBWizard (with LiveWire supporting the PCB production package), ultiBOARD7 (with multiSIM2021 supporting the PCB production package), etc. In our country at present is most used when genera, below this only Protel software is introduced. Protel is Protel (now Altium) pany in the late 1980s, is launched CAD tools PCB designer39。 Matlab, SystemView。t think, so they wasted a lot of our time and materials. And increases product development cycle and lasted product timetomarket transforms product lose market petitive advantage. Have to use DianLaoTie test plate can know the results of method? Conclusion there is, this is circuit design and simulation technology. Say to the electronic circuit design and simulation tools of this technology, without mentioning America, have to mention their plane design why has high efficiency. Before our finalize the design a mediumsized plane design from the draft to the detailed design to the wind tunnel test to finally gives a picture to the actual operation, the cycle is about to 10 years. The United States is 1 year. Why is there such a huge gap? Because America in the design most USES is the virtual simulation technology, and the years of accumulation of various wind tunnel test parameters input puter, then through puter programming pile a virtual environment of software, and make it can automatic gameponent related formula and call after longterm accumulated input puter related experience parameters. Thus, as long as the aircraft shape program data in the virtual wind tunnel test software, where unreasonable have changes there, until the best effect, the efficiency high, end as long as natural again in the actual environment test several times look for shortage can finalize the design, from their Boeing 747 to us F16 are using this method. Aerodynamically data by senior experts to provide, software developers is IBM, aircraft design engineer just using simulation software in puter platform of various simulative debugging can. Similarly, they many other things are adopted such similar method, from large to small, from plex to simple, even including the design of furnit