利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

14 条记录 (耗时 0.019 秒)

    Loop filter architecture
    5.
    发明授权
    Loop filter architecture 有权
    环路滤波器架构

    公开(公告)号：US06600351B2

    公开(公告)日：2003-07-29

    申请号：US10072094

    申请日：2002-02-08

    申请人： Biagio Bisanti ,  Stefano Cipriani ,  Francesco Coppola

    发明人： Biagio Bisanti ,  Stefano Cipriani ,  Francesco Coppola

    IPC分类号： H03L706

    CPC分类号： H03L7/0893

    摘要： A phase-lock loop (PLL) filter architecture includes a first charge pump (508) and a second change pump (510). The second charge pump (510) operates in opposite phase of the first charge pump (508) in order to take away excess charge from the loop filter capacitor(s). By using a second charge pump as described, the PLL filter does not require the use of a large capacitor and can therefore be integrated.

    摘要翻译： 锁相环（PLL）滤波器结构包括第一电荷泵（508）和第二变换泵（510）。 第二电荷泵（510）在第一电荷泵（508）的相反相位操作，以便从环路滤波电容器中夺走过量的电荷。 通过使用如上所述的第二电荷泵，PLL滤波器不需要使用大电容器，因此可以被集成。

    Oscillator coupling to reduce spurious signals in receiver circuits
    8.
    发明授权
    Oscillator coupling to reduce spurious signals in receiver circuits 有权
    振荡器耦合以减少接收机电路中的杂散信号

    公开(公告)号：US07397311B2

    公开(公告)日：2008-07-08

    申请号：US11439658

    申请日：2006-05-24

    申请人： Biagio Bisanti ,  Francesco Coppola ,  Stefano Cipriani

    发明人： Biagio Bisanti ,  Francesco Coppola ,  Stefano Cipriani

    IPC分类号： H03L7/00

    CPC分类号： H04B1/28 ,  H04B1/403

    摘要： A first receiver frequency reference is passively coupled to a second receiver by tapping a signal directly from the resonant element, such as a crystal, of an oscillator in the first receiver to drive the input of the second receiver. The sinusoidal signal from the resonant element is relatively free of harmonics and minimizes interference that could be caused by harmonics of a square wave signal coupling or an amplified signal. The oscillator of each receiver can be selectively enabled or disabled to allow the receiver to either generate or receive the frequency reference. This technique of coupling can be used to couple a frequency reference signal between integrated circuit receivers.

    摘要翻译： 第一接收机频率参考被动地耦合到第二接收机，通过从第一接收机中的振荡器的谐振元件（例如晶体）直接抽出信号来驱动第二接收机的输入。 来自谐振元件的正弦信号相对没有谐波并且最小化可能由方波信号耦合或放大信号的谐波引起的干扰。 可以选择性地使能或禁用每个接收机的振荡器以允许接收机生成或接收频率参考。 这种耦合技术可用于在集成电路接收器之间耦合频率参考信号。

    Oscillator coupling to reduce spurious signals in receiver circuits
    9.
    发明申请
    Oscillator coupling to reduce spurious signals in receiver circuits 有权
    振荡器耦合以减少接收机电路中的杂散信号

    公开(公告)号：US20060270372A1

    公开(公告)日：2006-11-30

    申请号：US11439658

    申请日：2006-05-24

    申请人： Biagio Bisanti ,  Francesco Coppola ,  Stefano Cipriani

    发明人： Biagio Bisanti ,  Francesco Coppola ,  Stefano Cipriani

    IPC分类号： H04B7/00

    CPC分类号： H04B1/28 ,  H04B1/403

    摘要： A first receiver frequency reference is passively coupled to a second receiver by tapping a signal directly from the resonant element, such as a crystal, of an oscillator in the first receiver to drive the input of the second receiver. The sinusoidal signal from the resonant element is relatively free of harmonics and minimizes interference that could be caused by harmonics of a square wave signal coupling or an amplified signal. The oscillator of each receiver can be selectively enabled or disabled to allow the receiver to either generate or receive the frequency reference. This technique of coupling can be used to couple a frequency reference signal between integrated circuit receivers.

    摘要翻译： 第一接收机频率参考被动地耦合到第二接收机，通过从第一接收机中的振荡器的谐振元件（例如晶体）直接抽出信号来驱动第二接收机的输入。 来自谐振元件的正弦信号相对没有谐波并且最小化可能由方波信号耦合或放大信号的谐波引起的干扰。 可以选择性地使能或禁用每个接收机的振荡器以允许接收机生成或接收频率参考。 这种耦合技术可用于在集成电路接收器之间耦合频率参考信号。

    Tuning circuit having electronically trimmed VCO
    10.
    发明授权
    Tuning circuit having electronically trimmed VCO 有权
    调谐电路具有电子调整VCO

    公开(公告)号：US06806781B2

    公开(公告)日：2004-10-19

    申请号：US09815831

    申请日：2001-03-23

    申请人： Biagio Bisanti ,  Francesco Coppola ,  Pascal Guignon

    发明人： Biagio Bisanti ,  Francesco Coppola ,  Pascal Guignon

    IPC分类号： H03L700

    CPC分类号： H03L7/113 ,  H03B5/1243 ,  H03B5/1265 ,  H03B5/1293 ,  H03J5/246 ,  H03L7/099

    摘要： A voltage controlled oscillator (38) includes an LC tank (20) and a capacitor bank (21). LC tank (20) includes an inductor (12) and a varactor (14). The capacitive output of the varactor is controlled by a control voltage &ngr;. To electronically tune the voltage controlled oscillator, a set of capacitors (24) in the capacitor bank (21) are enabled by a digital control signal based on a frequency comparison with a desired frequency. Once the capacitor bank is set, the frequency can be locked at the desired frequency by the phase lock loop.

    摘要翻译： 压控振荡器（38）包括LC箱（20）和电容器组（21）。 LC箱（20）包括电感器（12）和变容二极管（14）。 变容二极管的电容输出由控制电压nu控制。 为了电压调节压控振荡器，电容器组（21）中的一组电容器（24）通过基于与期望频率的频率比较的数字控制信号来实现。 一旦电容器组被置位，频率可以通过锁相环锁定在所需的频率。