蓝牙耳机的参考电路图(BC4 bga 6X6)
上传时间： 2013-12-31
上传用户：star_in_rain
bga Binary Genetic Algorithm Matlab Code
标签： Algorithm Genetic Binary Matlab
上传时间： 2013-11-30
上传用户：zhuyibin
bga Binary Genetic Algorithm Matlab Code
标签： Algorithm Genetic Binary Matlab
上传时间： 2017-08-05
上传用户：koulian
电子工艺,质量及可靠性相关专辑 80册 902Mbga焊接视频 5.8M.rar
标签：
上传时间： 2014-05-05
上传用户：时代将军
1.5mm间距bga封装库bga芯片封装ALTIUM库(AD库PCB封装库 )，51个封装，列表如下：Component Count : 51Component Name-----------------------------------------------bga150P3X3-9bga150P4X4-16bga150P4X4-16Abga150P5X5-25bga150P5X5-25Abga150P5X5-25Bbga150P6X6-36bga150P6X6-36Abga150P6X6-36Bbga150P7X7-49bga150P7X7-49Abga150P7X7-49Bbga150P8X8-64bga150P8X8-64Abga150P8X8-64Bbga150P9X9-81bga150P9X9-81Abga150P10X10-100bga150P10X10-100Abga150P11X11-121bga150P11X11-121Abga150P12X12-144bga150P13X13-169bga150P14X14-196bga150P14X14-196Abga150P15X15-225bga150P15X15-225Abga150P15X15-225Bbga150P16X16-256bga150P17X17-289bga150P18X18-324bga150P18X18-324Abga150P19X19-361bga150P19X19-361Abga150P20X20-400bga150P21X21-441bga150P22X22-484bga150P22X22-484Abga150P23X23-529bga150P24X24-576bga150P25X25-625bga150P25X25-625Abga150P26X26-676bga150P27X27-729bga150P28X28-784bga150P29X29-841bga150P30X30-900bga150P30X30-900Abga150P31X31-961bga150P32X32-1024bga150P33X33-1089
标签： bga封装库
上传时间： 2021-11-30
上传用户：qingfengchizhu
0.5mm间距bga封装库bga芯片封装ALTIUM库(AD库PCB封装库 )，21个，封装型号列表如下：Component Count : 21Component Name-----------------------------------------------bga50P5X5-25bga50P5X5-25Vbga50P6X6-36Vbga50P7X7-48bga50P7X7-49bga50P7X7-49Vbga50P8X8-56bga50P8X8-64bga50P9X9-80bga50P9X9-81bga50P10X10-56bga50P11X11-100bga50P11X11-120bga50P11X11-121bga50P14X14-100bga50P14X14-132bga50P14X14-196bga50P15X15-164bga50P18X18-180bga50P19X19-281bga50P20X20-256
标签： bga封装库
上传时间： 2021-11-30
上传用户：
0.8mm间距bga封装库bga芯片封装ALTIUM库(AD库PCB封装库 )，50个，PCB封装列表：Component Count : 50Component Name-----------------------------------------------bga80P6X6-36bga80P7X7-48bga80P7X7-49bga80P7X7-49Abga80P8X6-48bga80P8X8-64bga80P8X8-64Abga80P8X8-64Bbga80P9X9-81bga80P10X10-84bga80P10X10-100bga80P10X10-100Abga80P12X12-128bga80P12X12-128Abga80P12X12-128Bbga80P12X12-144bga80P12X12-144Abga80P13X13-144Abga80P13X13-144Bbga80P13X13-144Cbga80P13X13-152bga80P13X13-169bga80P14X14-160bga80P14X14-180bga80P14X14-180Abga80P14X14-196bga80P14X14-196Abga80P15X15-176bga80P15X15-177bga80P16X16-208bga80P16X16-256bga80P16X16-256Abga80P17X17-208bga80P17X17-208Abga80P17X17-256bga80P17X17-272bga80P17X17-289bga80P19X19-257bga80P19X19-257Abga80P19X19-280Abga80P19X19-280Bbga80P19X19-280Cbga80P19X19-288bga80P19X19-332bga80P20X20-324bga80P20X20-363bga80P22X22-240bga80P22X22-340bga80P22X22-384bga80P22X22-484
标签： bga封装库
上传时间： 2021-11-30
上传用户：xsr1983
1mm间距bga芯片封装库ALTIUM库PCB封装库(AD库 )，114个，封装库型号列表：Component Count : 114Component Name-----------------------------------------------bga100P5X5-25bga100P6X6-36bga100P6X6-36Abga100P7X7-49bga100P7X7-49Abga100P8X8-64bga100P8X8-64Abga100P9X9-81bga100P9X9-81Abga100P10X10-100bga100P10X10-100Abga100P10X10-100Bbga100P10X10-100Cbga100P11X11-121bga100P11X11-121Abga100P12X12-144bga100P12X12-144Abga100P12X12-144Bbga100P13X13-169bga100P13X13-169Abga100P14X14-160bga100P14X14-176bga100P14X14-196bga100P14X14-196Bbga100P15X15-225bga100P16X16-208bga100P16X16-256bga100P16X16-256Bbga100P16X16-256Cbga100P17X17-169bga100P17X17-289bga100P18X18-320bga100P18X18-324bga100P19X19-361bga100P20X20-292bga100P20X20-400bga100P20X20-400Abga100P21X21-441bga100P22X22-324bga100P22X22-388bga100P22X22-456bga100P22X22-484bga100P22X22-484Bbga100P22X22-484Cbga100P22X22-484Dbga100P23X23-413bga100P23X23-529bga100P24X24-552bga100P24X24-552Abga100P24X24-552Bbga100P24X24-576bga100P24X24-576Abga100P25X25-625bga100P26X26-352bga100P26X26-388bga100P26X26-416bga100P26X26-452bga100P26X26-456Abga100P26X26-484bga100P26X26-665bga100P26X26-668bga100P26X26-672bga100P26X26-675bga100P26X26-676bga100P26X26-676Abga100P27X27-729bga100P28X28-780bga100P28X28-780Abga100P28X28-783bga100P28X28-784bga100P29X29-841bga100P30X30-516bga100P30X30-556bga100P30X30-676Bbga100P30X30-896Abga100P30X30-900bga100P31X31-961bga100P32X32-772bga100P32X32-772Abga100P32X32-1020bga100P32X32-1024bga100P33X33-1089bga100P34X34-580bga100P34X34-680bga100P34X34-1136bga100P34X34-1148bga100P34X34-1152Abga100P34X34-1152Bbga100P34X34-1153bga100P34X34-1156bga100P36X36-1296bga100P37X37-1369bga100P38X38-1444bga100P39X39-680bga100P39X39-680Abga100P39X39-792bga100P39X39-896bga100P39X39-1508Abga100P39X39-1513bga100P39X39-1517bga100P39X39-1521bga100P41X41-1681bga100P42X42-860bga100P42X42-1696bga100P42X42-1704bga100P42X42-1738bga100P42X42-1760bga100P42X42-1764
上传时间： 2021-11-30
上传用户：
印刷线路板制作技术大全-高速PCB设计指南:改进电路设计规程提高可测试性随着微型化程度不断提高，元件和布线技术也取得巨大发展，例如bga外壳封装的高集成度的微型IC，以及导体之间的绝缘
上传时间： 2013-06-26
上传用户：waitingfy
现代信息技术的迅猛发展，使得图像处理方面的研究与应用，尤其是实时图像处理引起了更广泛的关注。近年来，随着嵌入式和DSP技术的不断发展，数字信号处理领域的理论研究成果被逐渐应用到实际系统中，从而推动了新理论的产生和应用，对图像处理等领域的技术发展起到了十分重要的作用。可见，研究如何将ARM和DSP双处理器结构应用于实时图像处理系统的新方法有着非常重要的理论价值和应用价值。本文主要研究内容如下： 1.分析了实时图像处理领域的最新发展，得出了以ARM和DSP分别作为实时图像处理系统核心的优势和劣势，结合本课题实时性，高效性和便携性的特点，设计一个以ARM+DSP双处理器为核心的通用实时图像处理系统，并通过增加或裁剪可以广泛应用于图像处理和图像识别领域。 2.掌纹识别技术是继指纹识别和虹膜识别后人体生物特征识别领域中最新的研究方向，正处在不断的研究和探索阶段。在论文中，介绍了以ARM+DSP双处理器为核心的通用实时图像处理系统和掌纹识别技术相融合的实例，构成最基本的脱机掌纹识别系统，给出了系统的组成和运行的基本流程，实现最基本的识别功能，降低成本，提升实时掌纹识别系统的性能。 3.具体设计中，在对两种系统组成方案经过比较后，选择了基于TI公司的TMS320VC5470双核处理器为核心，根据TMS320VC5470芯片的特点，对系统平台的硬件原理进行设计，扩充了进行研究所需的片外RAM，ROM(Flash)，人机接口电路，外围接口电路，仿真接口JTAG等。随后根据原理图所需器件，选择相对应的封装形式，设计8层印刷电路板，对bga封装形式芯片的扇出方式，布线规则以及高速数字电路与高速PCB设计中涉及的信号完整性问题予以重点研究，较好解决了高密度bga封装集成电路的布线及其电磁兼容性问题。除此之外，在软件设计方面，讨论了针对TMS320VC5470系统脱离主机开发环境成为独立系统时双核Bootload的实现、双核间通讯及程序固化到FLASH中的方法。 本文所做的创新工作是将ARM和DSP有效的相结合，使他们在实时图像处理系统中发挥各自的优势，克服自身的劣势，提升了实时图像处理系统的性能，缩小了体积，节约了成本；并基于上述研究成果，将该ARM+DSP实时图像处理系统和最新的掌纹识别的原理相结合，构成了手持式掌纹识别系统，对于实时掌纹识别技术的研究有着非常重要意义。
上传时间： 2013-07-31
上传用户：muyehuli
