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公开(公告)号：US07541877B2
公开(公告)日：2009-06-02
申请号：US11896183
申请日：2007-08-30
IPC分类号： H03L7/085
CPC分类号： H03L7/0991 , H03L7/093 , H04L7/08
摘要： An auto-adjusting high accuracy oscillator is disclosed, which comprises: a frequency comparator, for comparing a synchronization signal obtained from a USB host with an oscillation signal obtain from a device; a control tuning circuit, further comprising a counter and an adder/sub circuit; and an oscillating element; wherein a variation is obtained by the counting of the counter while transmitting the variation to the adder/sub circuit to be encoded thereby into a digital code so as to enable the oscillating element to perform a frequency up/down operation accordingly for approaching the synchronization signal successively.
摘要翻译： 公开了一种自动调节高精度振荡器，它包括：频率比较器，用于将从USB主机获得的同步信号与从设备获得的振荡信号进行比较; 控制调谐电路，还包括计数器和加法器/子电路; 和振荡元件; 其中通过对所述计数器进行计数而获得变化，同时将所述变化发送到要编码的加法器/子电路，从而形成数字代码，以使所述振荡元件能够相应地进行上变频/下变频操作以接近所述同步信号 依次。
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公开(公告)号：US07283000B2
公开(公告)日：2007-10-16
申请号：US11291841
申请日：2005-12-02
IPC分类号： H03L7/085
CPC分类号： H03L7/0991 , H03L7/093 , H04L7/08
摘要： An auto-adjusting high accuracy oscillator is disclosed, which includes: a frequency comparator, for comparing a synchronization signal obtained from a USB host with an oscillation signal obtain from a device; a control tuning circuit, further comprising a counter and an adder/sub circuit; and an oscillating element; wherein a variation is obtained by the counting of the counter while transmitting the variation to the adder/sub circuit to be encoded thereby into a digital code so as to enable the oscillating element to perform a frequency up/down operation accordingly for approaching the synchronization signal successively.
摘要翻译： 公开了一种自动调节高精度振荡器，其包括：频率比较器，用于将从USB主机获得的同步信号与从设备获得的振荡信号进行比较; 控制调谐电路，还包括计数器和加法器/子电路; 和振荡元件; 其中通过对所述计数器进行计数而获得变化，同时将所述变化发送到要编码的加法器/子电路，从而形成数字代码，以使所述振荡元件能够相应地进行上变频/下变频操作以接近所述同步信号 依次。
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