公开(公告)号：US07751792B2

公开(公告)日：2010-07-06

申请号：US11086045

申请日：2005-03-22

申请人： Lawrence E. Connell ,  David P. Kovac ,  Poojan A. Wagh ,  Vikram B. Karnani ,  William T. Waldie ,  Tao Wu

发明人： Lawrence E. Connell ,  David P. Kovac ,  Poojan A. Wagh ,  Vikram B. Karnani ,  William T. Waldie ,  Tao Wu

IPC分类号： H04B1/26

CPC分类号： H03D7/1441 ,  H03D7/1458 ,  H03D7/1466 ,  H03D7/165 ,  H03D2200/0084 ,  H03D2200/0088

摘要： Transmission of a high frequency signal is provided by a passive mixer. The passive mixer receives a low frequency signal as an input. The passive mixer includes a plurality of transistors each with a gate, a source, and a drain. The passive mixer also includes a local oscillator connected to the gates of the transistors. The gates of the transistors are also connected to a DC bias proportional to the threshold voltage of the transistors. In addition, an output of the passive mixer may be attenuated by a passive attenuator wherein both the passive attenuator and passive mixer are substantially free of quiescent current.

摘要翻译： 高频信号的传输由无源混频器提供。 无源混频器接收低频信号作为输入。 无源混频器包括多个晶体管，每个具有栅极，源极和漏极。 无源混频器还包括连接到晶体管的栅极的本地振荡器。 晶体管的栅极也连接到与晶体管的阈值电压成比例的DC偏置。 此外，无源混频器的输出可以被无源衰减器衰减，其中无源衰减器和无源混频器都基本上没有静态电流。

公开(公告)号：US07495515B1

公开(公告)日：2009-02-24

申请号：US11895427

申请日：2007-08-24

申请人： Jason H. Branch ,  Lawrence E. Connell ,  Patrick L. Rakers ,  Poojan A. Wagh

发明人： Jason H. Branch ,  Lawrence E. Connell ,  Patrick L. Rakers ,  Poojan A. Wagh

IPC分类号： H03F3/04

CPC分类号： H03F3/191 ,  H03F1/56 ,  H03F3/45192 ,  H03F2200/213 ,  H03F2200/294 ,  H03F2203/45386 ,  H03F2203/45544

摘要： Methods and corresponding systems in a low noise amplifier include selecting a selected sub-band for amplifying, wherein the selected sub-band is one of a plurality of sub-bands, wherein each sub-band is a portion of a frequency band, and wherein each sub-band has a corresponding sub-band center frequency. Next, a gate-source capacitor is adjusted so that a real part of an LNA input impedance corresponds to a real part of a source impedance at the selected sub-band center frequency. A match capacitor is also adjusted so that the LNA input impedance corresponds to the complex conjugate of the source impedance at the selected sub-band center frequency. The gate-source capacitor and the match capacitor can each be adjusted by recalling capacitor values from memory that correspond to the selected sub-band, and connecting selected capacitor components in response to the recalled capacitor values.

摘要翻译： 低噪声放大器中的方法和对应系统包括选择用于放大的所选择的子带，其中所选择的子带是多个子带中的一个，其中每个子带是频带的一部分，并且其中 每个子带具有相应的子带中心频率。 接下来，调整栅极 - 源极电容器，使得LNA输入阻抗的实部对应于所选择的子带中心频率处的源极阻抗的实部。 还调整匹配电容器，使得LNA输入阻抗对应于所选子带中心频率处的源阻抗的复共轭。 可以通过从对应于所选择的子带的存储器调用电容器值来调整栅极 - 源极电容器和匹配电容器，并且响应于调用的电容器值连接所选择的电容器部件。

公开(公告)号：US07609779B2

公开(公告)日：2009-10-27

申请号：US11363463

申请日：2006-02-27

申请人： Poojan A. Wagh ,  Lawrence E. Connell ,  Matthew R. Miller

发明人： Poojan A. Wagh ,  Lawrence E. Connell ,  Matthew R. Miller

IPC分类号： H04L27/00

CPC分类号： H04L27/2071

摘要： An RF modulator supporting wide-band signals includes IQ modulation by interleaving the in-phase and quadrature signals. The modulator can be implemented using an integrated circuit having a baseband in-phase stage that receives an in-phase analog input signal, a baseband quadrature stage that receives a quadrature analog input signal, and a switching mixer having a plurality of switches. The switching mixer receives in-phase and quadrature signals from the baseband in-phase stage and the baseband quadrature stage. The switching mixer produces a differential signal combining the in-phase and quadrature signals by interleaving the signals over a plurality of phases of a carrier period.

摘要翻译： 支持宽带信号的RF调制器通过交织同相和正交信号来包括IQ调制。 可以使用具有接收同相模拟输入信号的基带同相级的集成电路，接收正交模拟输入信号的基带正交级和具有多个开关的开关混频器来实现调制器。 开关混频器从基带同相级和基带正交级接收同相和正交信号。 开关混频器通过在载波周期的多个相位上交织信号来产生组合同相和正交信号的差分信号。

公开(公告)号：US07177616B2

公开(公告)日：2007-02-13

申请号：US10917891

申请日：2004-08-13

申请人： Lawrence E. Connell ,  Yan Cui ,  Poojan A. Wagh ,  Patrick L. Rakers

发明人： Lawrence E. Connell ,  Yan Cui ,  Poojan A. Wagh ,  Patrick L. Rakers

IPC分类号： G06F3/033 ,  H04B1/18

CPC分类号： H03D7/1441 ,  H03D7/1458 ,  H03D7/1466 ,  H03D2200/0025 ,  H03D2200/0088 ,  H04B1/30

摘要： Method and apparatus are provided for high linearity and low noise communication signal mixing. The apparatus includes a high linearity low noise mixer having an input stage coupled to a switch stage by a series-coupled blocking capacitance and input resistance. The input stage includes a buffer with negative feedback, and the switch stage includes a transistor based switch network connected to an amplifier that has feedback resistance and shunting capacitance. The method includes AC coupling an RF signal, increasing a gain of the RF signal, reducing third-order distortion by negatively feeding-back the RF signal, blocking IM2 generated from said gain increasing step, increasing a second-order input intercept point (IIP2) by attenuating the RF signal across a resistance, and applying a local oscillator input to the RF signal.

摘要翻译： 提供了高线性度和低噪声通信信号混合的方法和装置。 该装置包括具有通过串联耦合的阻塞电容和输入电阻耦合到开关级的输入级的高线性度低噪声混合器。 输入级包括具有负反馈的缓冲器，并且开关级包括连接到具有反馈电阻和分流电容的放大器的基于晶体管的开关网络。 该方法包括AC耦合RF信号，增加RF信号的增益，通过负反馈RF信号减少三阶失真，阻止从所述增益增加步骤产生的IM2，增加二阶输入截点（IIP2 ），通过跨越电阻衰减RF信号，以及将本地振荡器输入施加到RF信号。

公开(公告)号：US06587010B2

公开(公告)日：2003-07-01

申请号：US09995123

申请日：2001-11-27

申请人： Poojan A. Wagh ,  Pallab Midya ,  Patrick Rakers

发明人： Poojan A. Wagh ,  Pallab Midya ,  Patrick Rakers

IPC分类号： H03B104

CPC分类号： H03K7/00 ,  H04B1/04

摘要： A modulated signal source for implementing A modulated signal method of a generating a modulated signal having a radio frequency based upon a linear mixing of signals is disclosed. An in-phase pulse signal modulator of the modulated signal source provides an in-phase pulse modulated signal in response to a reception of a baseband in-phase signal and an in-phase clock signal with the in-phase clock signal and the in-phase pulse modulated signal being synchronized. A quadrature pulse signal modulator of the modulated signal source provides a quadrature pulse modulated signal in response to a reception of a baseband quadrature signal and a quadrature clock signal with the quadrature clock signal and the quadrature pulse modulated signal being synchronized. A switch signal generator of the modulated signal source generates an in-phase switch signal and a quadrature switch signal in response to a reception of the in-phase clock signal, the in-phase pulse modulated signal, the quadrature clock signal, and the quadrature pulse modulated signal. The in-phase clock signal and the in-phase switch signal are synchronized, and the quadrature clock signal and the quadrature switch signal are synchronized. A radio frequency signal generator of the modulated signal source provides one or more modulated signals having a radio frequency in response to either a reception the in-phase switch signal and the quadrature phase signal, or a reception of a switch signal as a function of the in-phase switch signal and the quadrature phase signal.

公开(公告)号：US06549085B1

公开(公告)日：2003-04-15

申请号：US09995122

申请日：2001-11-27

申请人： Poojan A. Wagh ,  Pallab Midya ,  Patrick Rakers

发明人： Poojan A. Wagh ,  Pallab Midya ,  Patrick Rakers

IPC分类号： H03K708

CPC分类号： H03K7/10

摘要： A device for implementing a method for generating a pulse width modulated signal based upon a natural sampling technique is disclosed. First, a complex baseband signal is received by the device. Second, the device computes a first pulse edge vector and a second pulse edge vector as a function of the baseband signal. Third, the device computes a first set of natural sampling points as a function of the first pulse edge vector and computes a second set of natural sampling points as a function of the second pulse edge vector. These computations can involve one or more detections of a jump k&pgr; within the first pulse edge vector and/or the second pulse edge vector. Finally, the pulse width modulated signal is generated with pulse edges corresponding to the first set of natural sampling points and the second set of natural sampling points.

摘要翻译： 公开了一种用于实现基于自然采样技术产生脉宽调制信号的方法的装置。 首先，设备接收到复杂的基带信号。 第二，该装置计算作为基带信号的函数的第一脉冲边缘向量和第二脉冲边缘向量。 第三，设备根据第一脉冲边缘向量计算第一组自然采样点，并计算作为第二脉冲边缘向量的函数的第二组自然采样点。 这些计算可涉及在第一脉冲边缘向量和/或第二脉冲边缘向量内的跳转kpi的一个或多个检测。 最后，利用对应于第一组自然采样点和第二组自然采样点的脉冲边缘产生脉宽调制信号。

公开(公告)号：US06614323B2

公开(公告)日：2003-09-02

申请号：US09995305

申请日：2001-11-27

申请人： Poojan A. Wagh ,  Pallab Midya ,  Patrick Rakers

发明人： Poojan A. Wagh ,  Pallab Midya ,  Patrick Rakers

IPC分类号： H03K700

CPC分类号： H03C3/40

摘要： A device for implementing a method for receiving a complex baseband signal in analog form or in digital form, and providing a pulse modulated signal as a linear modulation of the complex baseband signal is disclosed. First, a complex modulated signal as a function of the complex baseband signal is generated. Second, a bandlimited exponential signal as a function of the complex modulated signal as computed with a truncated Taylor series for an exponential is generated, or a coefficient vector as a function of the complex modulated signal is generated. Finally, a pulse modulated signal as either a function of the bandlimited exponential signal or the coefficient vector is generated.

摘要翻译： 公开了一种用于实现用于以模拟形式或数字形式接收复基带信号的方法，并提供脉冲调制信号作为复基带信号的线性调制的装置。 首先，生成作为复基带信号的函数的复调制信号。 第二，产生作为用指数的截断泰勒级数计算的复调制信号的函数的带限指数信号，或者产生作为复调制信号的函数的系数向量。 最后，产生作为带限指数信号或系数矢量的函数的脉冲调制信号。

公开(公告)号：US20090243908A1

公开(公告)日：2009-10-01

申请号：US12057658

申请日：2008-03-28

申请人： Poojan A. Wagh

发明人： Poojan A. Wagh

IPC分类号： H03M1/50

CPC分类号： H03H17/0283 ,  H03M1/504

摘要： A method and system of decimating a Pulse Width Modulated (PWM) signal (537) is provided. The method includes computing one or more timestamps (553) of the PWM signal (537), the PWM signal being at a first sample rate (567). The one or more timestamps (553) are computed at a second sample rate (568), which is lower than the first sample rate (567). Thereafter, the method generates a plurality of pre-filter signals (557-n) based on each of the one or more timestamps (553) and a plurality of translation factors (555-n). The plurality of pre-filter signals (557-n) is then filtered at the second sample rate (568) using a plurality of Infinite Impulse Response (IIR) filters (560-n) to generate a plurality of intermediate decimated Pulse Code Modulated (PCM) signals (563). The plurality of intermediate decimated PCM signals (563) is combined to generate a PCM signal (569).

摘要翻译： 提供了抽取脉宽调制（PWM）信号（537）的方法和系统。 该方法包括计算PWM信号（537）的一个或多个时间戳（553），该PWM信号处于第一采样率（567）。 以比第一采样率（567）低的第二采样率（568）计算一个或多个时间戳（553）。 此后，该方法基于一个或多个时间戳（553）和多个平移因子（555-n）中的每个生成多个预滤波器信号（557-n）。 然后使用多个无限脉冲响应（II-N）滤波器（560-n），以第二采样率（568）对多个预滤波器信号（557-n）进行滤波，以产生多个中间抽取脉冲编码调制（ PCM）信号（563）。 多个中间抽取PCM信号（563）被组合以产生PCM信号（569）。

公开(公告)号：US07570190B1

公开(公告)日：2009-08-04

申请号：US12057696

申请日：2008-03-28

申请人： Andrew J. Pagones ,  Poojan A. Wagh

发明人： Andrew J. Pagones ,  Poojan A. Wagh

IPC分类号： H03M1/12

CPC分类号： H03M1/002 ,  H03M1/504

摘要： A method and system for operating a comparator (602) is provided. The method includes analyzing an output (612) of the comparator (602) based on one or more of a transition of the output, present operational state of the comparator, and at least one time instant corresponding to the output. The method further includes controlling an operational state of the comparator (602) based on the analysis of the output (612).

摘要翻译： 提供了一种用于操作比较器（602）的方法和系统。 该方法包括基于比较器的输出，当前操作状态的转变以及对应于输出的至少一个时刻的一个或多个来分析比较器（602）的输出（612）。 该方法还包括基于对输出的分析来控制比较器（602）的操作状态（612）。

公开(公告)号：US07612696B2

公开(公告)日：2009-11-03

申请号：US12057658

申请日：2008-03-28

申请人： Poojan A. Wagh

发明人： Poojan A. Wagh

IPC分类号： H03M5/08

CPC分类号： H03H17/0283 ,  H03M1/504

摘要： A method and system of decimating a Pulse Width Modulated (PWM) signal (537) is provided. The method includes computing one or more timestamps (553) of the PWM signal (537), the PWM signal being at a first sample rate (567). The one or more timestamps (553) are computed at a second sample rate (568), which is lower than the first sample rate (567). Thereafter, the method generates a plurality of pre-filter signals (557-n) based on each of the one or more timestamps (553) and a plurality of translation factors (555-n). The plurality of pre-filter signals (557-n) is then filtered at the second sample rate (568) using a plurality of Infinite Impulse Response (IIR) filters (560-n) to generate a plurality of intermediate decimated Pulse Code Modulated (PCM) signals (563). The plurality of intermediate decimated PCM signals (563) is combined to generate a PCM signal (569).

摘要翻译： 提供了抽取脉宽调制（PWM）信号（537）的方法和系统。 该方法包括计算PWM信号（537）的一个或多个时间戳（553），该PWM信号处于第一采样率（567）。 以比第一采样率（567）低的第二采样率（568）计算一个或多个时间戳（553）。 此后，该方法基于一个或多个时间戳（553）和多个平移因子（555-n）中的每个生成多个预滤波器信号（557-n）。 然后使用多个无限脉冲响应（II-N）滤波器（560-n），以第二采样率（568）对多个预滤波器信号（557-n）进行滤波，以产生多个中间抽取脉冲编码调制（ PCM）信号（563）。 多个中间抽取PCM信号（563）被组合以产生PCM信号（569）。