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    • 1. 发明授权
    • Integrated circuit device incorporating DLL circuit
    • 集成电路器件结合DLL电路
    • US06522182B2
    • 2003-02-18
    • US09385008
    • 1999-08-27
    • Hiroyoshi TomitaNaoharu ShinozakiNobutaka TaniguchiWaichirou FujiedaYasuharu SatoKenichi KawasakiMasafumi YamazakiKazuhiro Ninomiya
    • Hiroyoshi TomitaNaoharu ShinozakiNobutaka TaniguchiWaichirou FujiedaYasuharu SatoKenichi KawasakiMasafumi YamazakiKazuhiro Ninomiya
    • H03L706
    • H03L7/0805G11C7/1072G11C7/222H03K5/131
    • In the present invention, an external power source supplied to an integrated circuit device is divided into a first external power source for the DLL circuit and a second external power source for circuits other than the DLL circuit. According to the present invention, it is arranged that power source noise generated in the second external power source cannot be transmitted to the variable delay circuit by utilizing the first external power source preferably for the variable delay circuit of the DLL circuit and even more preferably for its delay unit. Also, preferably, it is arranged that power source noise generated in the second external power source cannot be transmitted to the phase coincidence detection unit by utilizing the first power source for the phase coincidence detection unit in the phase comparison circuit of the DLL circuit. Also, by connecting the first external earthing power source to the variable delay circuit and/or phase coincidence detection unit, the effect of power source noise from the second external earthing power source originating from the operation of circuits other than these is suppressed.
    • 在本发明中,提供给集成电路装置的外部电源被分成用于DLL电路的第一外部电源和除了DLL电路以外的电路的第二外部电源。 根据本发明,通过利用第一外部电源优选用于DLL电路的可变延迟电路,而将第二外部电源中产生的电源噪声不能传输到可变延迟电路,甚至更优选地用于 其延迟单位。 此外,优选地,通过利用DLL电路的相位比较电路中的相位一致检测单元的第一电源,将第二外部电源中产生的电源噪声不能发送到相位一致检测单元。 此外,通过将第一外部接地电源连接到可变延迟电路和/或相位一致检测单元,抑制源于除了这些以外的电路的操作的来自第二外部接地电源的电源噪声的影响。