利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

83 条记录 (耗时 0.115 秒)

    Method, system and apparatus for balanced frequency up-conversion of a baseband signal
    1.
    发明授权
    Method, system and apparatus for balanced frequency up-conversion of a baseband signal 有权
    用于基带信号平衡上变频的方法，系统和装置

    公开(公告)号：US08571135B2

    公开(公告)日：2013-10-29

    申请号：US13323550

    申请日：2011-12-12

    申请人： David F. Sorrells ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C Looke ,  Charley D. Moses, Jr. ,  Gregory S. Rawlins ,  Michael W. Rawlins

    发明人： David F. Sorrells ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C Looke ,  Charley D. Moses, Jr. ,  Gregory S. Rawlins ,  Michael W. Rawlins

    IPC分类号： H04L27/04 ,  H04L27/12 ,  H04L27/20

    CPC分类号： H04B1/0475 ,  H03C3/40 ,  H03D3/006 ,  H03D7/00 ,  H04L25/03

    摘要： A balanced transmitter up-converts a baseband signal directly from baseband-to-RF. The up-conversion process is sufficiently linear that no IF processing is required, even in communications applications that have stringent requirements on spectral growth. In operation, the balanced modulator sub-harmonically samples the baseband signal in a balanced and differential manner, resulting in harmonically rich signal. The harmonically rich signal contains multiple harmonic images that repeat at multiples of the sampling frequency, where each harmonic contains the necessary information to reconstruct the baseband signal. The differential sampling is performed according to a first and second control signals that are phase shifted with respect to each other. In embodiments of the invention, the control signals have pulse widths (or apertures) that operate to improve energy transfer to a desired harmonic in the harmonically rich signal. A bandpass filter can then be utilized to select the desired harmonic of interest from the harmonically rich signal. The sampling modules that perform the sampling can be configured in either a series or a shunt configuration. In embodiments of the invention, DC offset voltages are minimized between the sampling modules to minimize or prevent carrier insertion into the harmonic images.

    摘要翻译： 平衡发射机直接从基带到RF RF转换基带信号。 上转换过程是足够的线性，即使在对频谱增长有严格要求的通信应用中也不需要IF处理。 在运行中，平衡调制器以平衡和差分的方式对基带信号进行子谐波采样，从而产生谐波丰富的信号。 谐波丰富的信号包含以抽样频率的倍数重复的多个谐波图像，其中每个谐波包含必要的信息以重构基带信号。 根据相对于彼此相移的第一和第二控制信号执行差分采样。 在本发明的实施例中，控制信号具有脉冲宽度（或孔径），其操作以改善在谐波丰富信号中的期望谐波的能量传递。 然后可以利用带通滤波器从谐波丰富的信号中选择所需要的谐波。 执行采样的采样模块可以以串联或分流配置进行配置。 在本发明的实施例中，采样模块之间的DC偏移电压最小化，以最小化或防止载波插入到谐波图像中。

    Method and system for down-converting an electromagnetic signal, and transforms for same
    2.
    发明授权
    Method and system for down-converting an electromagnetic signal, and transforms for same 有权
    用于下变频电磁信号的方法和系统，并对其进行转换

    公开(公告)号：US08223898B2

    公开(公告)日：2012-07-17

    申请号：US12776173

    申请日：2010-05-07

    申请人： David F. Sorrells ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C. Looke ,  Charley D. Moses, Jr. ,  Gregory S. Rawlins ,  Michael W. Rawlins

    发明人： David F. Sorrells ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C. Looke ,  Charley D. Moses, Jr. ,  Gregory S. Rawlins ,  Michael W. Rawlins

    IPC分类号： H03D1/00 ,  H04L27/06

    CPC分类号： H03D7/00

    摘要： Methods, systems, and apparatuses, and combinations and sub-combinations thereof, for down-converting an electromagnetic (EM) signal are described herein. Briefly stated, in embodiments the invention operates by receiving an EM signal and recursively operating on approximate half cycles (½, 1½, 2½, etc.) of the carrier signal. The recursive operations can be performed at a sub-harmonic rate of the carrier signal. The invention accumulates the results of the recursive operations and uses the accumulated results to form a down-converted signal. In an embodiment, the EM signal is down-converted to an intermediate frequency (IF) signal. In another embodiment, the EM signal is down-converted to a baseband information signal. In another embodiment, the EM signal is a frequency modulated (FM) signal, which is down-converted to a non-FM signal, such as a phase modulated (PM) signal or an amplitude modulated (AM) signal.

    摘要翻译： 本文描述了用于电磁（EM）信号的下变频的方法，系统和装置，以及其组合和子组合。 简言之，在实施例中，本发明通过接收EM信号并且在载波信号的近似半周期（½，1½，2½等）上递归地操作）来操作。 可以以载波信号的次谐波速率执行递归运算。 本发明积累了递归运算的结果，并使用累加结果形成降频转换信号。 在一个实施例中，EM信号被下变频到中频（IF）信号。 在另一个实施例中，EM信号被下变频为基带信息信号。 在另一个实施例中，EM信号是频率调制（FM）信号，其被下变频成非FM信号，例如相位调制（PM）信号或幅度调制（AM）信号。

    Method and system for frequency down-conversion and frequency up-conversion
    3.
    发明授权
    Method and system for frequency down-conversion and frequency up-conversion 有权
    频率下变频和上变频的方法和系统

    公开(公告)号：US08019291B2

    公开(公告)日：2011-09-13

    申请号：US12435595

    申请日：2009-05-05

    申请人： David F. Sorrells ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C. Looke ,  Charley D. Moses, Jr.

    发明人： David F. Sorrells ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C. Looke ,  Charley D. Moses, Jr.

    IPC分类号： G06F15/16

    CPC分类号： H03C1/36 ,  H03C3/38 ,  H03D7/00 ,  H03D7/125 ,  H04B2001/0491

    摘要： A method and system is described wherein a signal with a lower frequency is up-converted to a higher frequency. In one embodiment, the higher frequency signal is used as a stable frequency and phase reference. In another embodiment, the invention is used as a transmitter. The up-conversion is accomplished by controlling a switch with an oscillating signal, the frequency of the oscillating signal being selected as a sub-harmonic of the desired output frequency. When the invention is being used as a frequency or phase reference, the oscillating signal is not modulated, and controls a switch that is connected to a bias signal. When the invention is being used in the frequency modulation (FM) or phase modulation (PM) implementations, the oscillating signal is modulated by an information signal before it causes the switch to gate the bias signal. In the amplitude modulation implementation (AM), the oscillating signal is not modulated, but rather causes the switch to gate a reference signal that is substantially equal to or proportional to the information signal. In the FM and PM implementations, the signal that is output from the switch is modulated substantially the same as the modulated oscillating signal. In the AM implementation, the signal that is output from the switch has an amplitude that is a function of the information signal. In both embodiments, the output of the switch is filtered, and the desired harmonic is output.

    摘要翻译： 描述了一种方法和系统，其中具有较低频率的信号被上变频到更高的频率。 在一个实施例中，较高频率信号用作稳定的频率和相位参考。 在另一个实施例中，本发明用作发射机。 通过用振荡信号控制开关来实现上变换，振荡信号的频率被选择为所需输出频率的次谐波。 当本发明用作频率或相位参考时，振荡信号不被调制，并且控制连接到偏置信号的开关。 当本发明用于频率调制（FM）或相位调制（PM）实施方案中时，振荡信号在信号信号被调制之前，使开关门偏置偏置信号。 在幅度调制实现（AM）中，振荡信号不被调制，而是使开关栅极基本上等于或者与信息信号成比例的参考信号。 在FM和PM实现中，从开关输出的信号被调制为基本上与调制振荡信号相同。 在AM实现中，从开关输出的信号具有作为信息信号的函数的幅度。 在两个实施例中，开关的输出被滤波，并且输出所需的谐波。

    Method and circuit for down-converting a signal
    4.
    发明授权
    Method and circuit for down-converting a signal 有权
    用于下变频信号的方法和电路

    公开(公告)号：US07936022B2

    公开(公告)日：2011-05-03

    申请号：US12007342

    申请日：2008-01-09

    申请人： David F. Sorrells ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C. Looke ,  Charley D. Moses, Jr. ,  Michael W. Rawlins ,  Gregory S. Rawlins

    发明人： David F. Sorrells ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C. Looke ,  Charley D. Moses, Jr. ,  Michael W. Rawlins ,  Gregory S. Rawlins

    IPC分类号： H01L21/70

    CPC分类号： H04L27/3881 ,  H03C1/62 ,  H03D7/00 ,  H03D7/1441 ,  H03D7/1475 ,  H04B1/0025 ,  H04B1/16 ,  H04B1/28 ,  H04B7/12 ,  H04L25/08 ,  H04L27/00 ,  H04L27/06 ,  H04L27/12 ,  H04L27/14 ,  H04L27/148 ,  H04L27/156 ,  H04L27/2672

    摘要： Methods, systems, and apparatuses for down-converting an electromagnetic (EM) signal by aliasing the EM signal are described herein. Briefly stated, such methods, systems, and apparatuses operate by receiving an EM signal and an aliasing signal having an aliasing rate. The EM signal is aliased according to the aliasing signal to down-convert the EM signal. The term aliasing, as used herein, refers to both down-converting an EM signal by under-sampling the EM signal at an aliasing rate, and down-converting an EM signal by transferring energy from the EM signal at the aliasing rate. In an embodiment, the EM signal is down-converted to an intermediate frequency signal. In another embodiment, the EM signal is down-converted to a demodulated baseband information signal. In another embodiment, the EM signal is a frequency modulated (FM) signal, which is down-converted to a non-FM signal, such as a phase modulated signal or an amplitude modulated signal.

    摘要翻译： 这里描述了通过使EM信号进行混叠来降低电磁（EM）信号的转换的方法，系统和装置。 简要地说，这样的方法，系统和装置通过接收具有混叠速率的EM信号和混叠信号来操作。 EM信号根据混叠信号进行混叠，以降低EM信号的转换。 如本文所使用的，术语混叠是指通过以混叠速率对EM信号进行欠采样，并以混叠速率从EM信号传输能量来对EM信号进行下变频来对EM信号进行下变频。 在一个实施例中，EM信号被下变频为中频信号。 在另一实施例中，EM信号被下变频为解调的基带信息信号。 在另一个实施例中，EM信号是频率调制（FM）信号，其被下变频成非FM信号，例如相位调制信号或幅度调制信号。

    Method and circuit for down-converting a signal
    5.
    发明授权
    Method and circuit for down-converting a signal 有权
    用于下变频信号的方法和电路

    公开(公告)号：US07218907B2

    公开(公告)日：2007-05-15

    申请号：US11173021

    申请日：2005-07-05

    申请人： David F. Sorrells ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C. Looke ,  Charley D. Moses, Jr.

    发明人： David F. Sorrells ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C. Looke ,  Charley D. Moses, Jr.

    IPC分类号： H04B1/04 ,  H01Q11/12

    CPC分类号： H04L27/3881 ,  H03C1/62 ,  H03D7/00 ,  H03D7/1441 ,  H03D7/1475 ,  H04B1/0025 ,  H04B1/16 ,  H04B1/28 ,  H04B7/12 ,  H04L25/08 ,  H04L27/00 ,  H04L27/06 ,  H04L27/12 ,  H04L27/14 ,  H04L27/148 ,  H04L27/156 ,  H04L27/2672

    摘要： Methods, systems, and apparatuses for down-converting an electromagnetic (EM) signal by aliasing the EM signal are described herein. Briefly stated, such methods, systems, and apparatuses operate by receiving an EM signal and an aliasing signal having an aliasing rate. The EM signal is aliased according to the aliasing signal to down-convert the EM signal. The term aliasing, as used herein, refers to both down-converting an EM signal by under-sampling the EM signal at an aliasing rate, and down-converting an EM signal by transferring energy from the EM signal at the aliasing rate. In an embodiment, the EM signal is down-converted to an intermediate frequency (IF) signal. In another embodiment, the EM signal is down-converted to a demodulated baseband information signal. In another embodiment, the EM signal is a frequency modulated (FM) signal, which is down-converted to a non-FM signal, such as a phase modulated (PM) signal or an amplitude modulated (AM) signal.

    摘要翻译： 这里描述了通过使EM信号进行混叠来降低电磁（EM）信号的转换的方法，系统和装置。 简要地说，这样的方法，系统和装置通过接收具有混叠速率的EM信号和混叠信号来操作。 EM信号根据混叠信号进行混叠，以降低EM信号的转换。 如本文所使用的，术语混叠是指通过以混叠速率对EM信号进行欠采样，并以混叠速率从EM信号传输能量来对EM信号进行下变频来对EM信号进行下变频。 在一个实施例中，EM信号被下变频到中频（IF）信号。 在另一实施例中，EM信号被下变频为解调的基带信息信号。 在另一个实施例中，EM信号是频率调制（FM）信号，其被下变频成非FM信号，例如相位调制（PM）信号或幅度调制（AM）信号。

    Method and system for frequency up-conversion with modulation embodiments
    6.
    发明授权
    Method and system for frequency up-conversion with modulation embodiments 有权

    公开(公告)号：US07039372B1

    公开(公告)日：2006-05-02

    申请号：US09548923

    申请日：2000-04-13

    申请人： David F. Sorrells ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C. Looke ,  Charley D. Moses, Jr.

    发明人： David F. Sorrells ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C. Looke ,  Charley D. Moses, Jr.

    IPC分类号： H04B1/04

    CPC分类号： H03D7/00 ,  H03C1/62 ,  H04B1/04 ,  H04B7/12 ,  H04B2001/0491

    摘要： A method and system is described wherein an information signals is gated at a frequency that is a sub-harmonic of the frequency of the desired output signal. In the modulation embodiments, the information signal is modulated as part of the up-conversion process. In a first modulation embodiment, one information signal is phase modulated onto the carrier signal as part of the up-conversion process. In a second modulation embodiment, two information signals are multiplied, and, as part of the up-conversion process, one signal is phase modulated onto the carrier and the other signal is amplitude modulated onto the carrier. In a third modulation embodiment, one information signal is phase modulated onto the “I” phase of the carrier signal as part of the up-conversion process and a second information signal is phase modulated onto the “Q” phase of the carrier as part of the up-conversion process. In a fourth modulation embodiment, four information signals are phase and amplitude modulated onto the “I” and “Q” phases of the carrier as part of the up-conversion process. There are at least two implementations of each of the aforementioned embodiments.