公开(公告)号：EP2958231A1

公开(公告)日：2015-12-23

申请号：EP15172057.0

申请日：2015-06-15

申请人： Renesas Electronics Corporation

发明人： OZAWA, Osamu ,  NISHIOKA, Soshiro ,  NAKAMURA, Takashi ,  ABE, Susumu ,  TANIGUCHI, Kazuya ,  TANIMURA, Masaaki

IPC分类号： H03B5/36 ,  G01R31/28

CPC分类号： H03B5/36 ,  G01R31/2824 ,  H03B5/366 ,  H03B2200/005 ,  H03B2201/0266 ,  H03L7/00

摘要： A semiconductor integrated circuit device having a function to perform oscillation in combination with a crystal oscillator, includes: a first impedance element including a first external terminal coupled to one terminal of the crystal oscillator, a second external terminal coupled to the other terminal of the crystal oscillator, and first and second terminals coupled to the first and second external terminals when the oscillation is performed; a first variable capacitance circuit coupled to the first terminal of the feedback impedance element, and a configuration circuit for setting a capacitance value of the first variable capacitance circuit. A measurement signal is supplied to the second terminal of the feedback impedance element, and in response to this, the capacitance value of the first variable capacitance circuit is set by the configuration circuit based on the delay time of an observation signal generated at the first terminal with respect to the measurement signal.

摘要翻译： 具有结合的晶体振荡器进行振荡的功能的半导体集成电路器件，包括：第一阻抗元件，其包括耦合到所述晶体振荡器的一个端子，耦合到所述晶体的另一端子的第二外部端子的第一外部端子 振荡器，以及耦合到所述第一和第二外部端子当振荡进行第一和第二端子; 第一可变电容电路，其耦合到所述反馈阻抗元件的第一端，和用于设置所述第一可变电容电路的电容值的配置电路。 的测量信号被提供给反馈阻抗元件的第二端，并且响应于此，所述第一可变电容电路的电容值是基于在所述第一终端产生的观测信号的延迟时间由配置电路设置 相对于所述测量信号。