中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

214 records (took 0.039 seconds)

    Quadrature voltage controlled oscillators with phase shift detector
    111.
    发明授权
    Quadrature voltage controlled oscillators with phase shift detector 有权
    具有相移检测器的正交电压控制振荡器

    公开(公告)号：US07075377B2

    公开(公告)日：2006-07-11

    申请号：US10864969

    申请日：2004-06-10

    Applicant: Emmanuel Metaxakis

    Inventor： Emmanuel Metaxakis

    IPC: H03B5/12

    CPC classification number: H03L7/00 ,  H03B5/1215 ,  H03B5/1231 ,  H03B5/124 ,  H03B27/00 ,  H03B2201/025 ,  H03J2200/10

    Abstract: In wireless application there is made use of a quadrature oscillators that generate signals that are capable of oscillating at quadrature of each other. The quadrature oscillator is comprised of two differential modified Colpitts oscillators. A capacitor bank allows for the selection of a desired frequency from a plurality of discrete possible frequencies. The quadrature oscillator is further coupled with a phase-error detector connected at the point-of-use of the generated ‘I’ and ‘Q’ channels and through the control of current sources provides corrections means to ensure that the phase shift at the point-of-use remains at the desired ninety degrees.

    Abstract translation: 在无线应用中，使用产生能够彼此正交振荡的信号的正交振荡器。 正交振荡器由两个差分改进的Colpitts振荡器组成。 电容器组允许从多个离散的可能频率中选择期望的频率。 正交振荡器还与在所产生的“I”和“Q”通道的使用点处连接的相位误差检测器耦合，并且通过电流源的控制提供校正装置以确保在点处的相移 - 使用保持在所需的九十度。

    High frequency semiconductor integrated circuit and radio communication system
    113.
    发明授权
    High frequency semiconductor integrated circuit and radio communication system 失效
    高频半导体集成电路和无线电通信系统

    公开(公告)号：US07020444B2

    公开(公告)日：2006-03-28

    申请号：US10372922

    申请日：2003-02-26

    Applicant: Jiro Shinbo ,  Hirotaka Oosawa ,  Noriyuki Kurakami ,  Masumi Kasahara ,  Robert Astle Henshaw

    Inventor： Jiro Shinbo ,  Hirotaka Oosawa ,  Noriyuki Kurakami ,  Masumi Kasahara ,  Robert Astle Henshaw

    IPC: H04B1/40

    CPC classification number: H03L7/10 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243 ,  H03B5/1265 ,  H03B2201/025 ,  H03D3/008 ,  H03J1/005 ,  H03J2200/10 ,  H03L7/0891 ,  H03L7/099 ,  H03L7/193

    Abstract: A communication semiconductor integrated circuit has an oscillator circuit forming part of a transmission PLL circuit fabricated on a single semiconductor chip together with an oscillator circuit forming part of a reception PLL circuit and an oscillator circuit for an intermediate frequency. The oscillator circuit for the transmission PLL circuit is configured to be operable in a plurality of bands. The communication semiconductor integrated circuit also comprises a circuit for measuring the oscillating frequency of the oscillator circuit for the transmission PLL circuit, and a storage circuit for storing the result of measurement made by the measuring circuit. A band to be used by the oscillator circuit for the transmission PLL circuit is determined based on values for setting the oscillating frequencies of the oscillator circuit forming part of the reception PLL circuit and the intermediate frequency oscillator circuit, and the result of measurement stored in the storage circuit.

    Abstract translation: 通信半导体集成电路具有形成在单个半导体芯片上的传输PLL电路的一部分的振荡器电路以及形成接收PLL电路的一部分的振荡器电路和用于中频的振荡器电路。 用于传输PLL电路的振荡器电路被配置为可在多个频带中操作。 通信半导体集成电路还包括用于测量用于传输PLL电路的振荡器电路的振荡频率的电路和用于存储由测量电路进行的测量结果的存储电路。 用于传输PLL电路的振荡电路使用的频带基于用于设置构成接收PLL电路和中频振荡器电路的一部分的振荡电路的振荡频率的值和存储在传输PLL电路中的测量结果的值来确定 存储电路。

    Capacitor bank and voltage controlled oscillator having the same
    114.
    发明申请
    Capacitor bank and voltage controlled oscillator having the same 有权
    电容器组和压控振荡器具有相同的功能

    公开(公告)号：US20050184812A1

    公开(公告)日：2005-08-25

    申请号：US11061801

    申请日：2005-02-18

    Applicant: Je-Kwang Cho

    Inventor： Je-Kwang Cho

    IPC: H03B1/00 ,  H03B5/12 ,  H03L7/00

    CPC classification number: H03B5/1215 ,  H03B5/1228 ,  H03B2201/025 ,  H03J2200/10

    Abstract: A capacitor bank includes a first node, a second node, first blocking capacitors, N first AMOS varactors, second blocking capacitors and N second AMOS varactors. The first blocking capacitors have first terminals connected to the first node and second terminals where a bias voltage is applied. The N first AMOS varactors have first terminals connected to the second terminals of the first block capacitors. The second blocking capacitors have first terminals connected to the second node and second terminals where the bias voltage is applied. The N second AMOS varactors have first terminals connected to the second terminals of the second blocking capacitors and second terminals connected to second terminals of the first AMOS varactors, respectively, wherein N binary coded signals are applied to the respective second terminals of the first AMOS varactors and the second AMOS varactors. Therefore, phase-noise degradation caused by the FM modulation may be avoided.

    Abstract translation: 电容器组包括第一节点，第二节点，第一阻塞电容器，N个第一AMOS变容二极管，第二阻塞电容器和N个第二AMOS变容二极管。 第一隔离电容器具有连接到第一节点的第一端子和施加偏置电压的第二端子。 N个第一AMOS变容二极管具有连接到第一块电容器的第二端子的第一端子。 第二隔离电容器具有连接到第二节点的第一端子和施加偏置电压的第二端子。 N个第二AMOS变容二极管分别具有连接到第二隔离电容器的第二端子的第一端子和分别连接到第一AMOS变容二极管的第二端子的第二端子，其中N个二进制编码信号被施加到第一AMOS变容二极管的相应的第二端子 和第二个AMOS变容二极管。 因此，可以避免由FM调制引起的相位噪声劣化。

    Highly stable integrated time reference
    115.
    发明申请
    Highly stable integrated time reference 有权
    高度稳定的综合时间参考

    公开(公告)号：US20050168294A1

    公开(公告)日：2005-08-04

    申请号：US11069368

    申请日：2005-03-01

    Applicant: Mike Kappes ,  Terje Gloerstad

    Inventor： Mike Kappes ,  Terje Gloerstad

    IPC: H03B1/00 ,  H03K3/0231 ,  H03L7/00

    CPC classification number: H03L7/00 ,  H03B2201/0208 ,  H03B2201/025 ,  H03K3/0231

    Abstract: An integrated oscillator that may be used as a time clock includes circuitry that oscillates about an RC time constant, which RC time constant is adjustable to provide a desired frequency of oscillation. More specifically, the oscillator includes a capacitor array that has a plurality of capacitors coupled in parallel wherein each capacitor may be selectively included into the RC time constant or selectively excluded there from. Rather than setting the capacitance values to a desired capacitance value, a system for adjusting the time constant includes circuitry for measuring an output frequency and for comparing that to a certified frequency source wherein the time constant is adjusted by adding or removing capacitors from the capacitor array until the frequency of the internal clock matches an expected frequency.

    Abstract translation: 可用作时钟的集成振荡器包括围绕RC时间常数振荡的电路，RC时间常数可调，以提供期望的振荡频率。 更具体地说，振荡器包括电容器阵列，其具有并联耦合的多个电容器，其中每个电容器可被选择性地包括在RC时间常数中或者选择性地被包括在其中。 不是将电容值设置为期望的电容值，而是用于调整时间常数的系统包括用于测量输出频率并将其与经认证的频率源进行比较的电路，其中通过从电容器阵列中添加或去除电容器来调整时间常数 直到内部时钟的频率与预期频率相匹配。

    PLL circuit including a voltage controlled oscillator and a method for controlling a voltage controlled oscillator
    117.
    发明授权
    PLL circuit including a voltage controlled oscillator and a method for controlling a voltage controlled oscillator 有权
    PLL电路包括压控振荡器和控制压控振荡器的方法

    公开(公告)号：US06853257B2

    公开(公告)日：2005-02-08

    申请号：US10443105

    申请日：2003-05-22

    Applicant: Masayuki Yonekawa ,  Takehito Doi

    Inventor： Masayuki Yonekawa ,  Takehito Doi

    IPC: H03B5/08 ,  H03B1/00 ,  H03B5/12 ,  H03L7/099 ,  H03L7/10

    CPC classification number: H03L7/193 ,  H03B5/1215 ,  H03B5/1231 ,  H03B5/1243 ,  H03B5/1265 ,  H03B5/1293 ,  H03B2201/025 ,  H03J2200/10

    Abstract: A voltage controlled oscillator having a wide oscillation frequency band, desirable carrier-noise characteristic, and desirable linearity of the oscillation frequency relative to a control voltage. The voltage controlled oscillator includes an oscillation unit and a control unit. The oscillation unit generates an output signal having an oscillation frequency corresponding to the control voltage in one of a plurality of oscillation frequency bands. The oscillation unit includes a switching unit for selecting one of the plurality of oscillation frequency bands in accordance with a switching signal. The control unit generates the switching signal in accordance with the control voltage.

    Abstract translation: 具有宽振荡频带，期望载波噪声特性以及振荡频率相对于控制电压的期望线性度的压控振荡器。 压控振荡器包括振荡单元和控制单元。 振荡单元产生具有与多个振荡频带之一中的控制电压相对应的振荡频率的输出信号。 振荡单元包括用于根据切换信号选择多个振荡频带中的一个的切换单元。 控制单元根据控制电压生成开关信号。

    Digitally controlled crystal oscillator with integrated coarse and fine control
    119.
    发明授权
    Digitally controlled crystal oscillator with integrated coarse and fine control 有权
    数字控制晶体振荡器，集成粗细精细控制

    公开(公告)号：US06747522B2

    公开(公告)日：2004-06-08

    申请号：US10138027

    申请日：2002-05-03

    Applicant: David M. Pietruszynski ,  Douglas R. Frey

    Inventor： David M. Pietruszynski ,  Douglas R. Frey

    IPC: H01G438

    CPC classification number: H03K3/0307 ,  H03B5/32 ,  H03B2201/025 ,  H03J2200/10 ,  H03L7/099

    Abstract: A method of tuning a DCXO includes the step of providing a coarse tuning array and a fine tuning array of capacitors fabricated on the same integrated circuit die. The coarse array is adjusted until the difference between a desired frequency and the output frequency corresponds to a change in capacitance no greater than half the range of the fine tuning array. In one embodiment, the fine tuning array is adjusted to mid-range before adjusting the coarse tuning array. A DCXO apparatus includes at least one integrated circuit segmented switched capacitor network providing a capacitance that is a nonmonotonic function of a composite input code. The segmented switched capacitor network includes parallel coupled binary weighted and thermometer coded switched capacitor networks for coarse and fine tuning, respectively.

    Abstract translation: 调谐DCXO的方法包括提供在同一集成电路管芯上制造的粗调谐阵列和电容器的微调阵列的步骤。 调整粗阵列，直到期望频率和输出频率之间的差值对应于不大于微调阵列范围的一半的电容变化。 在一个实施例中，在调整粗调谐阵列之前，将微调阵列调整到中等范围。 DCXO装置包括至少一个集成电路分段的开关电容器网络，其提供作为复合输入代码的非单调功能的电容。 分段开关电容网络分别包括用于粗调和微调的并联耦合二进制加权和温度计编码的开关电容器网络。

    LC oscillator with wide tuning range and low phase noise
    120.
    发明申请
    LC oscillator with wide tuning range and low phase noise 有权
    LC振荡器具有宽调谐范围和低相位噪声

    公开(公告)号：US20030227340A1

    公开(公告)日：2003-12-11

    申请号：US10443835

    申请日：2003-05-23

    Applicant: GCT Semiconductor, Inc.

    Inventor： Yido Koo ,  Jeong-Woo Lee ,  Joonbae Park ,  Kyeongho Lee

    IPC: H03B001/00

    CPC classification number: H03L7/099 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1265 ,  H03B2201/025 ,  H03J2200/10

    Abstract: A voltage-controlled oscillator including an active oscillator circuit, an inductor, and capacitive circuits is disclosed. The capacitive circuits are selectively turned on and off to control the frequency of the voltage-controlled oscillator. Particularly, the inductor and the capacitors in the capacitive circuits form LC circuits that provide feedback to the active oscillator circuit. To avoid damage to the switches in the capacitive circuits, the capacitive circuits further comprise resistors. The resistors can be configured in several different ways so that the voltage-controlled oscillator can have a high degree of reliability, and a wide tuning range with constant phase noise performance.

    Abstract translation: 公开了一种包括有源振荡器电路，电感器和电容电路的压控振荡器。 电容电路选择性地导通和截止以控制压控振荡器的频率。 特别地，电容电路中的电感器和电容器形成LC电路，向有源振荡器电路提供反馈。 为了避免损坏电容电路中的开关，电容电路还包括电阻器。 电阻器可以以几种不同的方式配置，使得压控振荡器可以具有高可靠性，以及具有恒定相位噪声性能的宽调谐范围。

Patent Agency Ranking