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    Oscillator circuits
    1.
    发明公开
    Oscillator circuits 有权

    公开(公告)号：EP2562934A3

    公开(公告)日：2013-03-13

    申请号：EP12193350.1

    申请日：2002-10-15

    申请人： Fujitsu Semiconductor Limited

    发明人： Ogawa, Yashushige ,  Kawamoto, Satoru

    IPC分类号： H03K3/014 ,  H03K3/03

    CPC分类号： G06F1/04 ,  G11C7/22 ,  G11C7/222 ,  G11C11/406 ,  G11C11/4074 ,  G11C2207/2227 ,  G11C2211/4067 ,  H03K3/012 ,  H03K3/014 ,  H03K3/0315 ,  H03K5/1252 ,  H03K5/19 ,  H03L3/00

    摘要： There is provided an oscillator circuit in which an oscillation permitting signal (EN) sets an oscillator section (5) in an oscillation-operable state, whereby a controller section (4) starts operation. The controller section (4) that has started its operation changes an oscillation-frequency control signal (VR) value corresponding to a predetermined oscillation frequency so as to set an oscillation frequency at an oscillator section (5). Further on, the oscillator section (5) outputs an oscillation signal (VOSC) in response to a detection signal (MON) that is outputted after a detector section (1) compares a signal inputted therein with a predetermined signal value and detects that the inputted signal reaches a predetermined signal value. Thereby, a transient state of an oscillation-frequency control signal (VR) can be detected. That is, there can be avoided an output of an unstable oscillation signal due to a transient oscillation-frequency control signal (VR). Such an oscillator circuit is capable of obtaining stable frequency by avoiding output having unstable frequency that is likely to occur to an operation/stop-control-feasible type oscillator circuit when oscillation begins.

    Oscillator circuits
    2.
    发明公开
    Oscillator circuits 有权
    振荡电路

    公开(公告)号：EP1328065A3

    公开(公告)日：2005-07-20

    申请号：EP02257128.5

    申请日：2002-10-15

    申请人： FUJITSU LIMITED

    发明人： Ogawa, Yasushige, c/o Fujitsu VLSI Limited ,  Kawamoto, Satoru, c/o Fujitsu VLSI Limited

    IPC分类号： H03K3/014

    CPC分类号： G06F1/04 ,  G11C7/22 ,  G11C7/222 ,  G11C11/406 ,  G11C11/4074 ,  G11C2207/2227 ,  G11C2211/4067 ,  H03K3/012 ,  H03K3/014 ,  H03K3/0315 ,  H03K5/1252 ,  H03K5/19 ,  H03L3/00

    摘要： There is provided an oscillator circuit in which an oscillation permitting signal (EN) sets an oscillator section (5) in an oscillation-operable state, whereby a controller section (4) starts operation. The controller section (4) that has started its operation changes an oscillation-frequency control signal (VR) value corresponding to a predetermined oscillation frequency so as to set an oscillation frequency at an oscillator section (5). Further on, the oscillator section (5) outputs an oscillation signal (VOSC) in response to a detection signal (MON) that is outputted after a detector section (1) compares a signal inputted therein with a predetermined signal value and detects that the inputted signal reaches a predetermined signal value. Thereby, a transient state of an oscillation-frequency control signal (VR) can be detected. That is, there can be avoided an output of an unstable oscillation signal due to a transient oscillation-frequency control signal (VR). Such an oscillator circuit is capable of obtaining stable frequency by avoiding output having unstable frequency that is likely to occur to an operation/stop-control-feasible type oscillator circuit when oscillation begins.

    Oscillator circuits
    4.
    发明公开
    Oscillator circuits 有权
    Oszillatorschaltungen

    公开(公告)号：EP1328065A2

    公开(公告)日：2003-07-16

    申请号：EP02257128.5

    申请日：2002-10-15

    申请人： FUJITSU LIMITED

    发明人： Ogawa, Yasushige, c/o Fujitsu VLSI Limited ,  Kawamoto, Satoru, c/o Fujitsu VLSI Limited

    IPC分类号： H03K3/014

    CPC分类号： G06F1/04 ,  G11C7/22 ,  G11C7/222 ,  G11C11/406 ,  G11C11/4074 ,  G11C2207/2227 ,  G11C2211/4067 ,  H03K3/012 ,  H03K3/014 ,  H03K3/0315 ,  H03K5/1252 ,  H03K5/19 ,  H03L3/00

    摘要： There is provided an oscillator circuit in which an oscillation permitting signal (EN) sets an oscillator section (5) in an oscillation-operable state, whereby a controller section (4) starts operation. The controller section (4) that has started its operation changes an oscillation-frequency control signal (VR) value corresponding to a predetermined oscillation frequency so as to set an oscillation frequency at an oscillator section (5). Further on, the oscillator section (5) outputs an oscillation signal (VOSC) in response to a detection signal (MON) that is outputted after a detector section (1) compares a signal inputted therein with a predetermined signal value and detects that the inputted signal reaches a predetermined signal value. Thereby, a transient state of an oscillation-frequency control signal (VR) can be detected. That is, there can be avoided an output of an unstable oscillation signal due to a transient oscillation-frequency control signal (VR). Such an oscillator circuit is capable of obtaining stable frequency by avoiding output having unstable frequency that is likely to occur to an operation/stop-control-feasible type oscillator circuit when oscillation begins.

    摘要翻译： 提供了振荡器电路，其中振荡允许信号（EN）将振荡器部分（5）设置在振荡可操作状态，由此控制器部分（4）开始操作。 已经开始其操作的控制器部分（4）改变对应于预定振荡频率的振荡频率控制信号（VR）值，以便在振荡器部分（5）处设置振荡频率。 此外，振荡器部分（5）响应于在检测器部分（1）将输入的信号与预定信号值进行比较之后输出的检测信号（MON）输出振荡信号（VOSC），并检测输入的 信号达到预定的信号值。 由此，可以检测振荡频率控制信号（VR）的过渡状态。 也就是说，可以避免由于瞬态振荡频率控制信号（VR）引起的不稳定振荡​​信号的输出。 这样的振荡电路能够通过在振荡开始时避免可能发生在操作/停止控制可行型振荡器电路的频率不稳定的输出而获得稳定的频率。

    An oscillator
    5.
    发明公开
    An oscillator 失效
    Oszillator

    公开(公告)号：EP0848496A2

    公开(公告)日：1998-06-17

    申请号：EP97121942.3

    申请日：1997-12-12

    申请人： Texas Instruments Incorporated

    发明人： Tinsley, Steven ,  Carvajal, Fernando

    IPC分类号： H03K3/354

    CPC分类号： H03B5/364 ,  H03K3/014 ,  H03K3/3545

    摘要： A CMOS oscillator includes two differential input transistors (150) and (152) which have the sources thereof coupled through a resonator element (196). Active loads (166) and (178) provide a squaring up of the output which then drives an output transistor (202). The gates of the differential input transistors (150) and (152) are biased to predetermined voltage levels with bias circuits, with the positive input of the comparator configuration coupled through a feedback capacitor (208) to the output (204). This provides sufficient instability to initiate oscillation with a gain of the device controlled by resonator circuit (196).

    摘要翻译： CMOS振荡器包括两个差分输入晶体管（150）和（152），它们的源极通过谐振元件（196）耦合。 有源负载（166）和（178）提供输出的平方，然后驱动输出晶体管（202）。 差分输入晶体管（150）和（152）的栅极通过偏置电路偏置到预定电压电平，其中比较器配置的正输入通过反馈电容器208耦合到输出端204。 这提供了充分的不稳定性，以便由谐振器电路（196）控制的器件的增益来启动振荡。

    Oscillation circuit
    7.
    发明公开
    Oscillation circuit 失效
    振荡电路

    公开(公告)号：EP0320969A3

    公开(公告)日：1990-07-11

    申请号：EP88121112.2

    申请日：1988-12-16

    申请人： KABUSHIKI KAISHA TOSHIBA

    发明人： Sakihama, Kazuhisa ,  Fujimoto, Takuya ,  Sueda, Akihiro

    IPC分类号： H03K3/03

    CPC分类号： H03K3/014 ,  H03K3/0307

    摘要： An oscillation circuit comprises an oscillator (OS) including a CMOS inverter (IV), a feedback reactance (FX) connected between the input and output terminals of the CMOS inverter (IV) and a CMOS transfer gate (TG) connected as a feedback resistor between the input and output terminals of the CMOS inverter (IV), a power source terminal section to which an external voltage (VB) is applied, and a power control unit (PC1) for con­verting the external voltage (VB) to a first internal voltage (VD1) which is supplied as a power source voltage to the CMOS inverter (IV). In the oscillation circuit, the power control unit (PC1) converts the exter­nal voltage (VB) to a second internal voltage (VD2) independently from the first internal voltage (VD1) and supplies the second internal voltage (VD2) as a gate control voltage to the CMOS transfer gate (TG).

    摘要翻译： 一个振荡电路包括一个振荡器（OS），该振荡器包括一个CMOS反相器（IV），一个连接在CMOS反相器（IV）的输入和输出端之间的反馈电抗（FX）和一个作为反馈电阻器连接的CMOS传输门（TG） 在CMOS反相器（IV）的输入和输出端子之间施加外部电压（VB）的电源端子部分和用于将外部电压（VB）转换成第一内部电压（VB）的功率控制单元（PC1） 电压（VD1）作为电源电压提供给CMOS反相器（IV）。 在振荡电路中，功率控制单元（PC1）将外部电压（VB）转换为与第一内部电压（VD1）无关的第二内部电压（VD2），并将第二内部电压（VD2）作为栅极控制电压 到CMOS传输门（TG）。