排序方式: 共有59条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
为了设计合理高效的时钟树网络,对建立和保持时间约束以及时钟偏差进行分析,基于28 nm工艺设计了一款高速数字芯片,采用Innovus工具实施布局布线,在时钟树综合(CTS,clock tree synthesis)阶段采用CCOpt(clock concurrent optimization)技术,合理利用时钟偏差,同时优化时钟路径和逻辑路径,对时钟网络进行优化,并考察时钟树延时、时序和时钟网络功耗等指标。结果标明:与传统CTS技术相比,采用CCOpt技术时,最差时序违例和违例路径数量减少50%;布局布线时间减少2 h;芯片时钟网络内部互连功耗减少55%,泄漏功耗减少80%,有效提高了数字芯片的性能。 相似文献
5.
针对纳米级设计中时钟偏移大、时序不容易收敛等问题,提出了一种有效的时钟树综合(CTS)优化方案。以28 nm工艺的数字芯片为例,根据其时钟结构特点,将CTS过程分成两步完成。利用这种方法,采用Cadence公司的APR工具Encounter对数字模块进行时钟网络的设计;对分步CTS和传统CTS两种方法进行比较。结果表明:使用分步CTS的时钟偏移减小了52%,提高了时钟网络的性能,从而时序得到了很大的改善,芯片泄漏功耗也降低了45%。 相似文献
6.
7.
8.
9.
国内低压电力线载波通信应用现状分析 总被引:3,自引:1,他引:2
详细分析了国内外电力线载波通信应用背景和发展历程,对现有载波通信技术路线进行了归纳,对国内主流载波芯片厂家的产品做了介绍,并针对现有技术的不足,提出了未来芯片技术的发展方向和需要解决的问题。 相似文献
10.
Frequency synthesizer is an important part of optical and wireless communication system. Low power comsumption prescaler is
one of the most critical unit of frequency synthesizer. For the frequency divider, it must be programmable for channel selection
in multi-channel communication systems. A dual-modulus prescaler (DMP) is needed to provide variable division ratios. DMP
is considered as a critical power dissipative block since it always operates at full speed. This paper introduces a high speed
and low power complementary metal oxide semiconductor (CMOS) 15/16 DMP based on true single-phase-clock (TSPC) and transmission
gates (TGs) cell. A conventional TSPC is optimized in terms of devices size, and it is resimulated. The TSPC is used in the
synchronous and asynchronous counter. TGs are used in the control logic. The DMP circuit is implemented in 0.18 μm CMOS process.
The simulation results are provided. The results show wide operating frequency range from 7.143 MHz to 4.76 GHz and it comsumes
3.625 mW under 1.8 V power supply voltage at 4.76 GHz. 相似文献