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    An integrated circuit with two phase-locked loops and with means for preventing locking owing to injection
    3.
    发明公开
    An integrated circuit with two phase-locked loops and with means for preventing locking owing to injection 失效
    一种集成电路，其包括两个锁相环的装置，以及用于防止注入同步

    公开(公告)号：EP0892499A1

    公开(公告)日：1999-01-20

    申请号：EP97830351.9

    申请日：1997-07-14

    Applicant: STMicroelectronics S.r.l.

    Inventor： Celant, Luca ,  De Micheli, Marco ,  Bruccoleri, Melchiorre ,  Rigazio, Luca

    IPC: H03L7/07 ,  G11B20/10

    CPC classification number: H03L7/07 ,  G11B20/1403

    Abstract: The integrated circuit described comprises two phase-locked loops (R-PLL, W-PLL) each with its own oscillator (OSC-1, OSC-2). To prevent locking owing to injection between the two oscillators due to stray currents in the integrated circuit, a noise generator (N-GEN) is coupled to the oscillator (OSC-2) of one of the loops (W-PLL) and means (TM) are provided for activating the noise generator (N-GEN) in a manner such that the noise injected changes the frequency of the oscillator (OSC-2) randomly when the other loop (R-PLL) is in operation.

    Abstract translation: 集成电路描述由两锁相环（R-PLL，W-PLL）每个都有其自己的振荡器（OSC-1，OSC-2）。 为了防止由于两个振荡器之间的喷射由于在集成电路杂散电流锁定，噪声发生器（N-GEN）耦合到所述环中的一个（W-PLL）以及装置（的振荡器（OSC-2） TM）被提供用于激活噪声发生器（N-GEN）（以检查的方式做了噪声注入变化的振荡器OSC-2）随机地当其他环（R-PLL）是在操作中的频率。

    An oscillator with a low supply voltage
    4.
    发明公开
    An oscillator with a low supply voltage 失效
    Verszungsspannung的OszillatorfürBetrieb mit niedriger

    公开(公告)号：EP0887936A1

    公开(公告)日：1998-12-30

    申请号：EP97830295.8

    申请日：1997-06-24

    Applicant: STMicroelectronics S.r.l.

    Inventor： Celant, Luca ,  Demicheli, Marco ,  Bruccoleri, Melchiorre ,  Rigazio, Luca

    IPC: H03L1/00 ,  H03K3/0231

    CPC classification number: H03K3/2821 ,  H03K3/0231

    Abstract: The controllable-frequency oscillator described is of the astable multivibrator type with two transistors (Q1, Q2) coupled to one another by means of a capacitor (C) and a positive-feedback circuit. In order to reduce the supply voltage of the oscillator to the minimum, the positive-feedback circuit is constituted by a differential amplifier (T3, T4, R3, R4 and G5).

    Abstract translation: 所描述的可控频率振荡器是具有通过电容器（C）和正反馈电路彼此耦合的两个晶体管（Q1，Q2）的不稳定的多谐振荡器类型。 为了将振荡器的电源电压降至最低，正反馈电路由差分放大器（T3，T4，R3，R4和G5）构成。

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