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    • 9. 发明授权
    • All digital frequency-locked loop circuit method for clock generation in multicore microprocessor systems
    • 用于多核微处理器系统中时钟产生的所有数字锁相环电路方法
    • US07764132B2
    • 2010-07-27
    • US12182204
    • 2008-07-30
    • Lawrence JacobowitzDaniel J. Stigliani, Jr.
    • Lawrence JacobowitzDaniel J. Stigliani, Jr.
    • H03K3/03
    • H03L7/0996H03L7/18
    • A (DFLL) circuit residing on a local core of a multi-core microprocessor for generating a local core clock with a frequency for driving the local core includes a micro-controller configured to receive core characterizing digital data; a ring oscillator configured to generate the local core clock for the local core, and having a delay chain disposed between an output and a feedback input of the ring oscillator, the delay chain having delay taps each receiving the local core clock enabling quantum changes in the frequency of the local core clock; and a counter device configured to continually validate the frequency by generating a digital signal representative of the frequency to the micro-controller, the micro-controller compares the frequency of the local core clock to a desired clock frequency, and selects one of the delay taps based on the comparison to adjust the frequency value of the local core clock.
    • 驻留在用于产生具有用于驱动本地核的频率的本地核心时钟的多核微处理器的本地核心上的(DFLL)电路包括被配置为接收核心表征数字数据的微控制器; 环形振荡器,其被配置为产生用于本地核心的本地核心时钟,并且具有设置在环形振荡器的输出和反馈输入之间的延迟链,所述延迟链具有每个接收本地核心时钟的延迟抽头,从而能够在 本地核心时钟频率; 以及配置为通过向微控制器生成表示频率的数字信号来连续验证频率的计数器装置,微控制器将本地核心时钟的频率与期望的时钟频率进行比较,并且选择延迟抽头之一 基于比较来调整本地核心时钟的频率值。