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Gain, that Kv_343xo ~ o (r at d / s). When the internal phase detector when not in the input of phase detector PDI (pin @) and the output of the PDO (pin @) should be grounded: The use of external phase detector can also constitute a phase-locked loop PLL circuit, the same can be achieved MAX038 with an external signal synchronization output signal 4MAX038 high multi-layer printed circuit board design printed circuit board (better to use more than 4 layers) routing technology and a low impedance large area ground cloth to ensure that the circuit grounding, shielding and isolation is good. While reducing the circuit pension product; printed wiring board, the signal lines as short as possible, straight, not laid 90. Corners, rounded corners as much as possible, to reduce the parasitic capacitance, especially COSC side (pin @) of the capacitor C ground (large area) line to be as short as possible, reducing the extracellular signal coupling units at that point ; signal transmission line is long. Microstrip design techniques used to ensure impedance matching. Circuit design to maximize the use of linear power supply, and then add the necessary filter circuit (preferably in the form of multiple capacitors in parallel, such as ceramic or tantalum capacitors 1F and 1nF ceramic capacitor in parallel combination) to effectively reduce the power lines transition, inhibition of power supply interference, thereby improving noise ratio, particularly the use of SYNC terminal (pin @), you must pay attention to the DV + terminal (pin @) and the DGND terminal (pin @) of the question, then adding the ceramic lnF capacitor; installation, do not use Ic socket, try to use surface mount device to effectively reduce the parasitic reactance in order to obtain better high frequency performance reference 【1] Electronics Research Group, Tsinghua University compiled Beijing E Analog Electronics : Higher Education Press, 1996. 【2] Zheng Hongjun, Li Xin, and other typical operational amplifier application technology of Electronic Technique, 1999 (8): 56 ~ 58 【3] Guo Rong-like, Li I-side and so on. High-Speed Op Amp Applications of Electronic Technique, 1998 (4) :68-70. ■ (on the next page 89) (1) pSOS system was developed by the ISI modular embedded RTOS (real-time multitasking operating system); (2) isiBSP for the board support software development kit: (3) PRI is integrated development environment, including a text editor, MIPS compilers; (4) SPOTlight for source code debugging; (5) PROBE was run on a development board and the PRI / SPOTIin work debugger; (6) PREPC the target decoder device provides a standard C function in the system and software support packages. Including the boot ROM, initialization routines, LSI chip and its peripheral devices and software drivers WindowsCGI Loslc provided by the remote control and it includes a remote control part of the board-debug control MPEG-2 transport stream; by board-debug access to internal registers 1.641o8 and L64005. 42 development process 1) single stage of development (1) edit the source code in the editor,uggs online bestellen, the available vc, BC editor such as C language, may also be provided by PRI in the source editor to edit; (2) PRI in the build,tory burch, bld for the suffix to create a project,north face outlet, manned all the procedures; (3) compile the project to generate the corresponding downloaded to RAM in the binary file. Eel: 2.01 No. 5 overall No. 2 shallot 2) on-line debugging stage through the RS-232 serial port start-line debugging development platform: (1) Load, download the compiled binary file generated in the RAM; (2) Ooot, import pSOS operating system: (3) Gs,uggs kopen, running RAM in the user program; (4) debugging is successful, generating the binary download file to the ROM; (5) Download the file to the ROM chip; (6 ) switched on, dam 5 test: (7) If unsuccessful, the return procedure I. 5 Conclusion In this design the decoder for the received signal stream MPEG-2TS decode display. Can be applied to video conferencing, surveillance systems in the terminal to receive, you can also add a different front-end demodulator chip,moncler doudoune, receives satellite digital signals or digital cable signals. In further improvement of the decoder, it can be used in interactive TV set-top box technology. References 【I] Zhong Yuzhuo, Joe Ping-new, Qi Wei Generic coding of moving pictures and associated audio international standards 1] E Beijing: Tsinghua University Press, I997. 【2] Ma Xiaohu et al. Multimedia data compression standards and implementation Beijing: Tsinghua University Press, 1996. 【3] Yu Zhaoming. Digital TV and high-definition television. Beijing: Posts & Telecom Press. 1997. ■
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