文件名称:pll
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- 上传时间：2012-11-16
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文件大小：1.25kb
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DPLL由 鉴相器、 模K加减计数器、脉冲加减电路、同步建立侦察电路、模N分频器构成.
整个系统的中心频率(即signal_in和signal_out的码速率的2倍)为clk/8/N. 模K加减计数器的K值决定DPLL的精度和同步建立时间,K越大,则同步建立时间长,同步精度高.反之则短,低.
-DPLL by the phase detector, K addition and subtraction counter mode, pulse subtraction circuit, synchronous detection circuit established, constitute a model N divider. The whole system of the center frequency (ie signal_in and signal_out the code rate of 2 times) to clk/8/N. modulus K K value addition and subtraction counter DPLL decision to establish the accuracy and synchronization time, K is larger, the simultaneous establishment of a long time, synchronization accuracy. contrary is short and low.
整个系统的中心频率(即signal_in和signal_out的码速率的2倍)为clk/8/N. 模K加减计数器的K值决定DPLL的精度和同步建立时间,K越大,则同步建立时间长,同步精度高.反之则短,低.
-DPLL by the phase detector, K addition and subtraction counter mode, pulse subtraction circuit, synchronous detection circuit established, constitute a model N divider. The whole system of the center frequency (ie signal_in and signal_out the code rate of 2 times) to clk/8/N. modulus K K value addition and subtraction counter DPLL decision to establish the accuracy and synchronization time, K is larger, the simultaneous establishment of a long time, synchronization accuracy. contrary is short and low.
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pll.v
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