-
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：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
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：US07352311B2
公开(公告)日：2008-04-01
申请号：US11507919
申请日：2006-08-22
申请人： Matthew R. Miller , Pallab Midya , Poojan A. Wagh
发明人： Matthew R. Miller , Pallab Midya , Poojan A. Wagh
IPC分类号： H03M3/00
CPC分类号： H03M3/432
摘要： A system for a continuous time noise shaping analog-to-digital converter (“ADC”) with a suppressed carrier pulse width modulated (“PWM”) quantizer is disclosed. In particular, a suppressed carrier feedback signal may expand the dynamic range of a sigma delta modulated ADC and enhance the stability of the noise shaping loop.
摘要翻译： 公开了一种具有抑制载波脉宽调制（“PWM”）量化器的连续时间噪声整形模数转换器（“ADC”）的系统。 特别地，抑制的载波反馈信号可以扩展Σ-Δ调制ADC的动态范围，并增强噪声整形环路的稳定性。
-
公开(公告)号：US20080048898A1
公开(公告)日：2008-02-28
申请号：US11507919
申请日：2006-08-22
申请人： Matthew R. Miller , Pallab Midya , Poojan A. Wagh
发明人： Matthew R. Miller , Pallab Midya , Poojan A. Wagh
IPC分类号： H03M3/00
CPC分类号： H03M3/432
摘要： A system for a continuous time noise shaping analog-to-digital converter (“ADC”) with a suppressed carrier pulse width modulated (“PWM”) quantizer is disclosed. In particular, a suppressed carrier feedback signal may expand the dynamic range of a sigma delta modulated ADC and enhance the stability of the noise shaping loop.
摘要翻译： 公开了一种具有抑制载波脉宽调制（“PWM”）量化器的连续时间噪声整形模数转换器（“ADC”）的系统。 特别地，抑制的载波反馈信号可以扩展Σ-Δ调制ADC的动态范围，并增强噪声整形环路的稳定性。
-
公开(公告)号：US06606044B2
公开(公告)日：2003-08-12
申请号：US10034909
申请日：2002-01-02
IPC分类号： H03M300
CPC分类号： H03F3/2175 , H03F2200/331 , H03M1/822 , H03M5/08
摘要： A method and apparatus for a pulse width modulated (PWM) signal (30, 130) is provided. The input is a digital signal which is a modulated signal (24, 124). In the illustrated form, the modulated input signal is either a PDM signal or a PCM signal. In one embodiment of the present invention a PCM to PWM converter (16, 116) includes correction of duty ratio circuitry (48). The methodology used may include recursion on the values obtained after prediction, interpolation, and correction. The digital to analog conversion system (10) uses a PDM to PWM converter (20) which operates in an all digital domain and includes no analog circuitry.
摘要翻译： 提供了一种用于脉宽调制（PWM）信号（30,130）的方法和装置。 输入是作为调制信号（24,124）的数字信号。 在所示的形式中，调制输入信号是PDM信号或PCM信号。 在本发明的一个实施例中，PCM至PWM转换器（16,116）包括占空比电路（48）的校正。 所使用的方法可以包括在预测，插值和校正之后获得的值的递归。 数模转换系统（10）使用PDM到PWM转换器（20），其在全数字域中工作，并且不包括模拟电路。
-
公开(公告)号：US06504427B2
公开(公告)日：2003-01-07
申请号：US09872283
申请日：2001-05-31
IPC分类号： H03F338
CPC分类号： H03F3/2175
摘要： A switching amplifier (15) includes a power stage (18) and a digital correction circuit (16). The digital correction circuit (16) is for correcting nonlinearity and power supply noise introduced into a digital signal during power stage amplification. The digital correction circuit (16) receives a digital pulse modulated input signal from a processor (14) and an amplified pulse modulated output signal from the power stage (18), and performs a discrete-time pulse edge correction on the digital pulse modulated input signal to provide a corrected digital pulse modulated signal. The corrected digital pulse modulated signal is used as an input for the power stage (18).
-
公开(公告)号：US07495515B1
公开(公告)日：2009-02-24
申请号：US11895427
申请日：2007-08-24
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。
-
9.发明申请公开(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
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）。
-
-
-
-
-
-
-
-
-
搜索结果
14 条记录 (耗时 0.019 秒)
