共查询到20条相似文献,搜索用时 156 毫秒
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卫星数字电视节目的传输及接收□贾鹏远杜大力(陕西省渭南有线电视台714000)利用卫星传送模拟电视节目,质量高,覆盖面广,使其得到了广泛应用,但其占用频带宽、信道利用率低。卫星数字电视不仅能提供高质量的声像效果,而且为电视频带的压缩,提高信道的利用率... 相似文献
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2004年底,推出了国产首款卫星数字电视信道接收芯片GX1101(见图10),该芯片是由杭州国芯科技有限公司设计,采用中国最大的电子芯片制造商中芯国际(SMI C)0.18微米混合信号技术制造生产。GX1101采用自主专利的硬件盲扫技术,并且优化盲扫方案,即先扫描高符码率节目,因为扫描速度比 相似文献
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Nai-Chi Lee 《Analog Integrated Circuits and Signal Processing》1993,4(3):261-268
Progress in analog circuit testing has been hindered by the lack of structured design-for-testability methodologies. With the increasing complexity of analog/mixed-signal circuits, test program development time is now a major obstacle in achieving shorttime-to-market, while production testing cost is a prominent factor in total production cost. TheAnalog Autonomous Test is a structured design-for-testability scheme for analog circuits. Originally developed for testing analog circuits at chip level, AAT extends naturally to cover testing of mixedsignal integrated circuits mounted on printed circuit boards. With the addition of an analog test bus to PCBs, testability for analog components (bothcore circuits andglue circuits) can be improved, in a manner similar to that achieved for digital boards by the IEEE 1149.1 boundary scan scheme. Details on the implementation of thisAnalog Autonomous Test Bus, both at chip level and board level, are presented here. Its limitations and potential applications are also discussed. 相似文献
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Nai-Chi Lee 《Journal of Electronic Testing》1993,4(4):361-368
Progress in analog circuit testing has been hindered by the lack of structured design-for-testability methodologies. With the increasing complexity of analog/mixed-signal circuits, test program development time is now a major obstacle in achieving shorttime-to-market, while production testing cost is a prominent factor in total production cost. TheAnalog Autonomous Test is a structured design-for-testability scheme for analog circuits. Originally developed for testing analog circuits at chip level, AAT extends naturally to cover testing of mixedsignal integrated circuits mounted on printed circuit boards. With the addition of an analog test bus to PCBs, testability for analog components (bothcore circuits andglue circuits) can be improved, in a manner similar to that achieved for digital boards by the IEEE 1149.1 boundary scan scheme. Details on the implementation of thisAnalog Autonomous Test Bus, both at chip level and board level, are presented here. Its limitations and potential applications are also discussed. 相似文献
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本文提出一种三维片上系统(3D SoC)的测试策略,针对硅通孔(TSV,Through Silicon Vias)互连技术的3D SoC绑定中和绑定后的测试进行优化,由于测试时间和用于测试的TSV数目都会对最终的测试成本产生很大的影响,本文的优化策略在有效降低测试时间的同时,还可以控制测试用的TSV数目,从而降低了测试成本.实验结果表明,本文的测试优化策略与同类仅考虑降低测试时间的策略相比,可以进一步降低约20%的测试成本. 相似文献
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基于ISO14443A协议的RFID集成电路芯片测试系统的设计研究对改善当前ATE的高成本、性能浪费等现象有积极意义。基于ISO14443A协议,利用RFID集成电路芯片设计了一个系统,从软硬件两个方面进行设计调试,并配合优化方案解决设计问题,最终结果表明设计系统运行效果佳,稳定性好,对于工业集成电路芯片测试系统的研究有一定价值。 相似文献
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根据当前网络化测控需求,采用了ARM920T核的微处理器S3C2440,ZigBee无线SoC芯片CC2430F128相结合的硬件设计方案,设计了一种基于ARM和ZigBee的通用网络化测控系统硬件平台,详细阐明了系统各模块的硬件设计。实际应用表明,系统硬件平台网络性能好、通用性强且成本较低。 相似文献
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Feng HuangAuthor Vitae Xubang ShenAuthor VitaeXuecheng ZouAuthor Vitae Chaoyang ChenAuthor Vitae 《Microelectronics Journal》2003,34(1):85-91
This paper presents improvements in generation of wideband and high dynamic range analog signal for area-efficient MADBIST, especially for the on-chip testing of wireless communication IF digitizing sigma-delta modulator chip. Via increasing the order of the one-bit bandpass sigma-delta modulation algorithm up to 12 and using finite repetitious bitstream approximating scheme, it can achieve great improvements in signal bandwidth instead of purity at the cost of very little hardware overhead. Another contribution in this work is to provide the theoretical analysis of the reconstructed signal degradation due to harmonic distortion and clock jitter. Such on-chip analog stimulus generation scheme is especially fit for IF digitizing bandpass sigma-delta modulator chip's production-time testing and in-the-field diagnostics. The technique can also be extended to mixed-signal communication SoC built-in-self-test. 相似文献