利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

11 条记录 (耗时 0.022 秒)

    Oscillator for providing oscillation signal with controllable frequency
    1.
    发明授权
    Oscillator for providing oscillation signal with controllable frequency 有权
    用于提供具有可控频率的振荡信号的振荡器

    公开(公告)号：US07863993B1

    公开(公告)日：2011-01-04

    申请号：US12206448

    申请日：2008-09-08

    申请人： Mounir Bohsali ,  Ali Kiaei ,  Gerard Socci ,  Masood Yousefi ,  Ali Djabbari ,  Ahmad Bahai

    发明人： Mounir Bohsali ,  Ali Kiaei ,  Gerard Socci ,  Masood Yousefi ,  Ali Djabbari ,  Ahmad Bahai

    IPC分类号： H03B5/36 ,  H03C3/22

    CPC分类号： H03B5/366 ,  H03B5/368 ,  H03B2200/0008 ,  H03B2200/004 ,  H03B2200/005

    摘要： An oscillator, including amplifier circuitry and resonant circuitry, for providing an oscillation signal with a controllable frequency while maintaining a substantially constant steady state magnitude. Controllable reactive circuitry, included as part of the amplifier circuitry, has a reactance which can be controlled such that the resistive components of the amplifier circuitry and resonant circuitry impedances remain substantially equal. When in the form of serially coupled, controllable capacitances, the controllable reactive circuitry is controlled such that a ratio of changes in the controllable capacitances is approximately equal to a negative ratio of the capacitance values.

    摘要翻译： 包括放大器电路和谐振电路的振荡器，用于在保持基本恒定的稳态幅度的同时提供具有可控频率的振荡信号。 作为放大器电路的一部分包括的可控无功电路具有可以被控制的电抗，使得放大器电路和谐振电路阻抗的电阻分量保持基本相等。 当以串联耦合的可控电容的形式，可控电抗被控制使得可控电容的变化比大致等于电容值的负比。

    Sigma-delta modulator with DAC resolution less than ADC resolution
    4.
    发明授权
    Sigma-delta modulator with DAC resolution less than ADC resolution 有权
    DAC分辨率小于ADC分辨率的Σ-Δ调制器

    公开(公告)号：US07525464B2

    公开(公告)日：2009-04-28

    申请号：US11754442

    申请日：2007-05-29

    申请人： Franco Maloberti ,  Masood Yousefi ,  Ahmad Bahai

    发明人： Franco Maloberti ,  Masood Yousefi ,  Ahmad Bahai

    IPC分类号： H03M3/00

    CPC分类号： H03M3/428 ,  H03M3/454

    摘要： A sigma-delta modulator is provided with a feedback digital-to-analog converter having less resolution than the quantizer, while providing a reduced length output word, requiring minimal additional internal processing, and shaping of the truncation error by an effective noise transfer function greater than the order of the host sigma-delta modulator.

    摘要翻译： Σ-Δ调制器具有反馈数模转换器，其具有比量化器更低的分辨率，同时提供减小长度的输出字，需要最小额外的内部处理，并通过有效噪声传递函数对截断误差进行整形 比主机Σ-Δ调制器的顺序。

    SIGMA-DELTA MODULATOR WITH DAC RESOLUTION LESS THAN ADC RESOLUTION
    5.
    发明申请
    SIGMA-DELTA MODULATOR WITH DAC RESOLUTION LESS THAN ADC RESOLUTION 有权
    具有DAC分辨率低于ADC分辨率的SIGMA-DELTA调制器

    公开(公告)号：US20080297386A1

    公开(公告)日：2008-12-04

    申请号：US11754442

    申请日：2007-05-29

    申请人： Franco Maloberti ,  Masood Yousefi ,  Ahmad Bahai

    发明人： Franco Maloberti ,  Masood Yousefi ,  Ahmad Bahai

    IPC分类号： H03M3/00

    CPC分类号： H03M3/428 ,  H03M3/454

    摘要： A sigma-delta modulator is provided with a feedback digital-to-analog converter having less resolution than the quantizer, while providing a reduced length output word, requiring minimal additional internal processing, and shaping of the truncation error by an effective noise transfer function greater than the order of the host sigma-delta modulator.

    摘要翻译： Σ-Δ调制器具有反馈数模转换器，其具有比量化器更低的分辨率，同时提供减小长度的输出字，需要最小额外的内部处理，并通过有效噪声传递函数对截断误差进行整形 比主机Σ-Δ调制器的顺序。

    Methods and devices for randomizing burst errors
    7.
    发明授权
    Methods and devices for randomizing burst errors 有权
    用于随机化突发错误的方法和设备

    公开(公告)号：US07870462B2

    公开(公告)日：2011-01-11

    申请号：US11797767

    申请日：2007-05-07

    申请人： Ahmad Khalid Aman ,  Masoud Sajadieh ,  Mohsen Sarraf ,  Masood Yousefi

    发明人： Ahmad Khalid Aman ,  Masoud Sajadieh ,  Mohsen Sarraf ,  Masood Yousefi

    IPC分类号： H03M13/00

    CPC分类号： H03M13/2764 ,  H03M13/275

    摘要： Error bursts are randomized by an interleaver which makes use of “set leaders” to generate permutation indices. The permutation indices are used to route bits from initial positions in an input bit stream to re-arranged or randomized positions in an output bit stream. When the output bit stream is then transmitted and subsequently received by a de-interleaver which returns the received bits to their initial, pre-randomized positions, the resulting received signal has an acceptable bit error rate.

    摘要翻译： 错误突发由交织器随机化，该交织器利用“集合领导”来产生置换索引。 置换索引用于将输入比特流中的初始位置的比特路由到输出比特流中的重新排列或随机化的位置。 当输出比特流然后被解交织器发送并随后被接收时，其将接收到的比特返回到它们的初始预随机化位置，所得到的接收信号具有可接受的比特错误率。

    Methods and devices for randomizing burst errors
    9.
    发明申请
    Methods and devices for randomizing burst errors 有权
    用于随机化突发错误的方法和设备

    公开(公告)号：US20070208988A1

    公开(公告)日：2007-09-06

    申请号：US11797767

    申请日：2007-05-07

    申请人： Ahmad Aman ,  Masoud Sajadieh ,  Mohsen Sarraf ,  Masood Yousefi

    发明人： Ahmad Aman ,  Masoud Sajadieh ,  Mohsen Sarraf ,  Masood Yousefi

    IPC分类号： H03M13/00

    CPC分类号： H03M13/2764 ,  H03M13/275

    摘要： Error bursts are randomized by an interleaver which makes use of “set leaders” to generate permutation indices. The permutation indices are used to route bits from initial positions in an input bit stream to re-arranged or randomized positions in an output bit stream. When the output bit stream is then transmitted and subsequently received by a de-interleaver which returns the received bits to their initial, pre-randomized positions, the resulting received signal has an acceptable bit error rate.

    摘要翻译： 错误突发由交织器随机化，该交织器利用“集合领导”来产生置换索引。 置换索引用于将输入比特流中的初始位置的比特路由到输出比特流中的重新排列或随机化的位置。 当输出比特流然后被解交织器发送并随后被接收时，其将接收到的比特返回到它们的初始预随机化位置，所得到的接收信号具有可接受的比特错误率。