公开(公告)号：US08228131B2

公开(公告)日：2012-07-24

申请号：US13005176

申请日：2011-01-12

申请人： Kei Nagatomo ,  Hisato Takeuchi ,  Shuuji Shibuya

发明人： Kei Nagatomo ,  Hisato Takeuchi ,  Shuuji Shibuya

IPC分类号： H03B5/32

CPC分类号： H03L3/00 ,  H03L1/022

摘要： In a crystal-oscillator circuit having a quartz crystal unit, further stabilization of output frequency change at a time of startup of the power supply is achieved. A crystal-oscillator circuit having a quartz crystal unit includes a first variable-capacitance element, which forms an oscillation loop with the quartz crystal unit, and a temperature compensation circuit which provides a first control signal for the first variable-capacitance element to compensate for a temperature characteristic of the quartz crystal unit. In addition, the crystal-oscillator circuit includes a second variable-capacitance element group, and a time constant circuit which provides a time constant signal, which changes with a predetermined time constant, for the second variable-capacitance element group as a second control signal.

摘要翻译： 在具有石英晶体单元的晶体振荡器电路中，实现了在电源启动时输出频率变化的进一步稳定。 具有石英晶体单元的晶体振荡器电路包括与石英晶体单元形成振荡环路的第一可变电容元件和温度补偿电路，该电路为第一可变电容元件提供第一控制信号以补偿 石英晶体单元的温度特性。 此外，晶体振荡器电路包括第二可变电容元件组和时间常数电路，其将作为第二控制信号的第二可变电容元件组提供以预定时间常数变化的时间常数信号 。

公开(公告)号：US20110227655A1

公开(公告)日：2011-09-22

申请号：US13005176

申请日：2011-01-12

申请人： Kei NAGATOMO ,  Hisato Takeuchi ,  Shuuji Shibuya

发明人： Kei NAGATOMO ,  Hisato Takeuchi ,  Shuuji Shibuya

IPC分类号： H03L7/00

CPC分类号： H03L3/00 ,  H03L1/022

摘要： In a crystal-oscillator circuit having a quartz crystal unit, further stabilization of output frequency change at a time of startup of the power supply is achieved. A crystal-oscillator circuit having a quartz crystal unit includes a first variable-capacitance element, which forms an oscillation loop with the quartz crystal unit, and a temperature compensation circuit which provides a first control signal for the first variable-capacitance element to compensate for a temperature characteristic of the quartz crystal unit. In addition, the crystal-oscillator circuit includes a second variable-capacitance element group, and a time constant circuit which provides a time constant signal, which changes with a predetermined time constant, for the second variable-capacitance element group as a second control signal.

摘要翻译： 在具有石英晶体单元的晶体振荡器电路中，实现了在电源启动时输出频率变化的进一步稳定。 具有石英晶体单元的晶体振荡器电路包括与石英晶体单元形成振荡环路的第一可变电容元件和温度补偿电路，该电路为第一可变电容元件提供第一控制信号以补偿 石英晶体单元的温度特性。 此外，晶体振荡器电路包括第二可变电容元件组和时间常数电路，其将作为第二控制信号的第二可变电容元件组提供以预定时间常数变化的时间常数信号 。