公开(公告)号：US20090261902A1

公开(公告)日：2009-10-22

申请号：US12104874

申请日：2008-04-17

申请人： Pallab Midya ,  Matthew R. Miller ,  Theresa Paulo ,  William J. Roeckner

发明人： Pallab Midya ,  Matthew R. Miller ,  Theresa Paulo ,  William J. Roeckner

IPC分类号： H03F3/217

CPC分类号： H03F3/217

摘要： A circuit (104, 106) includes a comparison circuit (202, 504, 506, 602) and a correction circuit (204, 508, 510, 604). The comparison circuit provides a comparison signal (212, 524, 526, 612) in response to an error value (210, 520, 522, 610) and a reference value (214). The error value is based on a pulse modulated input signal (114) and a pulse modulated output signal (118). The correction circuit asynchronously provides a corrected pulse modulated signal (116) by selectively delaying and advancing an edge of the pulse modulated input signal based on the comparison signal. The pulse modulated output signal is based on the corrected pulse modulated signal.

摘要翻译： 电路（104,106）包括比较电路（202,504,506,602）和校正电路（204,508,510,604）。 比较电路响应于错误值（210,520,522,610）和参考值（214）提供比较信号（212,524,526,612）。 误差值基于脉冲调制输入信号（114）和脉冲调制输出信号（118）。 校正电路通过基于比较信号选择性地延迟和前进脉冲调制输入信号的边沿来异步地提供校正的脉冲调制信号（116）。 脉冲调制输出信号基于经校正的脉冲调制信号。

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：US07342518B2

公开(公告)日：2008-03-11

申请号：US10761158

申请日：2004-01-20

申请人： Pallab Midya ,  Karen K. Hicks ,  Anthony R. Schooler

发明人： Pallab Midya ,  Karen K. Hicks ,  Anthony R. Schooler

IPC分类号： H03M7/00

CPC分类号： H04L7/0029 ,  G11B2020/10675 ,  H03H17/028 ,  H03H17/0628 ,  H04L7/005

摘要： A method and apparatus of converting a data signal in a digital rate converter including upsampling the input data signal at an input sampling rate to an intermediate data signal at an intermediate sampling rate, where the intermediate data signal sample values are stored in a buffer. A plurality of buffer position values are provided from a subset of buffer positions of the buffer to an interpolator, the subset of buffer positions being dependent upon a position indicator. An output data signal is provided by the interpolator at an output sampling rate, where the value of the output data signal is dependent upon a fractional indicator provided to the interpolator. The input sampling rate is based on a first clock signal and the output sampling rate is based on a second clock signal, wherein the first and second clock signal are independent of each other.

摘要翻译： 一种在数字速率转换器中转换数据信号的方法和装置，包括以输入采样率将输入数据信号上采样到中间数据信号，其中中间数据信号采样值存储在缓冲器中。 从缓冲器的缓冲器位置的子集到内插器提供多个缓冲器位置值，缓冲器位置的子集取决于位置指示器。 输出数据信号由插值器以输出采样率提供，其中输出数据信号的值取决于提供给内插器的分数指示符。 输入采样率基于第一时钟信号，并且输出采样率基于第二时钟信号，其中第一和第二时钟信号彼此独立。

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：US20050254573A1

公开(公告)日：2005-11-17

申请号：US10845949

申请日：2004-05-14

申请人： Pallab Midya ,  Jing Fang

发明人： Pallab Midya ,  Jing Fang

IPC分类号： H03F1/26 ,  H03F3/217 ,  H03K7/08 ,  H04B14/04

CPC分类号： H03F3/217 ,  H03F1/26 ,  H03F2200/114 ,  H03F2200/264 ,  H03F2200/351 ,  H03F2200/372

摘要： A method and apparatus having a digital pulse width modulation generator with integral noise shaping is provided. The apparatus for generating a digital pulse width modulation signal includes a random period signal generator, a noise shaping unit, a duty ratio quantizer, and a PWM counter. The random period signal generator generates a random period signal. The noise shaping unit is responsive to at least a digital signal, the random period signal, and a delayed digital signal for generating a corrected signal. The duty ratio quantizer is responsive to the corrected digital signal, the random period signal, and a quantization clock signal, and generates a first duty ratio signal and a second duty ratio signal. The PWM counter is responsive to the first and second duty ratio signals and a quantization clock signal, and generates positive and negative PWM signals, respectively.

摘要翻译： 提供一种具有整体噪声整形的数字脉宽调制发生器的方法和装置。 用于产生数字脉宽调制信号的装置包括随机周期信号发生器，噪声整形单元，占空比量化器和PWM计数器。 随机周期信号发生器产生随机周期信号。 噪声整形单元至少响应数字信号，随机周期信号和用于产生校正信号的延迟数字信号。 占空比量化器响应校正的数字信号，随机周期信号和量化时钟信号，并产生第一占空比信号和第二占空比信号。 PWM计数器响应于第一和第二占空比信号和量化时钟信号，并分别产生正和负PWM信号。

公开(公告)号：US06414613B1

公开(公告)日：2002-07-02

申请号：US09478013

申请日：2000-01-05

申请人： Pallab Midya ,  Matthew R. Miller

发明人： Pallab Midya ,  Matthew R. Miller

IPC分类号： H03M300

CPC分类号： H03M7/3006 ,  H03M3/506 ,  H03M7/3037

摘要： A method for preserving phase information during quantization of pulse width modulation (PWM) signals used in power system applications. In one embodiment, a digital audio amplifier (12) implements a method of noise shaping, where the quantization error is used in coordination with a noise shaping filter (64) to remove the noise from the desired baseband of the output. A phase-preserving expression is used to provide additional information for generating the amplified output (40). In one embodiment, the filter (64) includes a series of integrators (70, 72), where non-linear integration terms are added at each stage of integration to provide the phase information. In one embodiment the filter is implemented in software to run on a digital signal processor, and in another the filter is implemented in a hardware accelerator.

摘要翻译： 一种用于在电力系统应用中使用的脉冲宽度调制（PWM）信号的量化期间保持相位信息的方法。 在一个实施例中，数字音频放大器（12）实现噪声整形的方法，其中与噪声整形滤波器（64）协调使用量化误差以从输出的期望基带去除噪声。 相位保留表达式用于提供用于生成放大输出的附加信息（40）。 在一个实施例中，滤波器（64）包括一系列积分器（70,72），其中在每个集成阶段添加非线性积分项以提供相位信息。 在一个实施例中，滤波器以软件实现以在数字信号处理器上运行，而另一个滤波器在硬件加速器中实现。

公开(公告)号：US6141541A

公开(公告)日：2000-10-31

申请号：US1762

申请日：1997-12-31

申请人： Pallab Midya ,  Lawrence E. Connell ,  Steven F. Gillig ,  John Grosspietsch ,  Andrew Merritt Khan ,  George Francis Opas ,  Robert Louis Palandech

发明人： Pallab Midya ,  Lawrence E. Connell ,  Steven F. Gillig ,  John Grosspietsch ,  Andrew Merritt Khan ,  George Francis Opas ,  Robert Louis Palandech

IPC分类号： H03F1/02 ,  H04B7/005 ,  H04W52/52 ,  H04B1/02

CPC分类号： H04W52/52 ,  H03F1/0227 ,  H03F2200/102 ,  Y02B60/50

摘要： A method (200) and device (100) provide an efficient linear power amplifier that generates a variable-envelope radio frequency RF signal. The method includes the steps of: A) using an efficient envelope-following unit to output a supply voltage in accordance with a variable envelope of an input baseband signal, wherein using the efficient envelope-following unit includes: 1) using a bandwidth-limiting mapping unit to determine a reference signal based on the baseband signal; and 2) using an envelope-tracking power converter to output a supply voltage, responsive to the reference signal, to the linear RF power amplifier; B) providing an RF input signal with amplitude and phase information to a linear RF power amplifier; and C) using the linear RF power amplifier to output a power-efficient amplified variable-envelope RF signal with substantially a same amplitude and phase information as the RF input signal.

摘要翻译： 一种方法（200）和装置（100）提供一种生成可变包络射频RF信号的有效线性功率放大器。 该方法包括以下步骤：A）使用有效的包络跟随单元根据输入基带信号的可变包络输出电源电压，其中使用有效包络跟随单元包括：1）使用带宽限制 映射单元，以基于所述基带信号确定参考信号; 以及2）使用包络跟踪功率转换器将响应于所述参考信号的电源电压输出到所述线性RF功率放大器; B）向线性RF功率放大器提供具有幅度和相位信息的RF输入信号; 和C）使用线性RF功率放大器输出具有与RF输入信号基本相同的幅度和相位信息的功率有效的放大的可变包络RF信号。

公开(公告)号：US6138042A

公开(公告)日：2000-10-24

申请号：US001625

申请日：1997-12-31

申请人： Pallab Midya ,  Lawrence E. Connell ,  John Grosspietsch ,  Ronald Gene Myers

发明人： Pallab Midya ,  Lawrence E. Connell ,  John Grosspietsch ,  Ronald Gene Myers

IPC分类号： H03F1/02 ,  H04Q7/23 ,  G05F1/70 ,  H02M7/155

CPC分类号： H03F1/0227 ,  H03F2200/102

摘要： A method (300, 400), device (100, 200), phone (200) and base station (200) provide an efficient tracking power converter for variable signals. The tracking power converter includes a feedforward feedback control unit that is coupled to receive a reference signal and to receive at least one feedback signal and is used for determining an optimal control signal in accordance with a predetermined scheme, a pulse width modulation unit that is coupled to the feedforward feedback control unit and is used for modifying a duty ratio to provide a switching signal, and a power converter that is coupled to the pulse width modulation unit and to a power source and is used for providing the dynamic variable output signal.

摘要翻译： 方法（300,400），设备（100,200），电话（200）和基站（200）为可变信号提供有效的跟踪功率转换器。 跟踪功率转换器包括前馈反馈控制单元，其耦合以接收参考信号并且接收至少一个反馈信号，并且用于根据预定方案确定最佳控制信号;脉冲宽度调制单元，被耦合 并且用于修改占空比以提供开关信号;以及功率转换器，其耦合到脉宽调制单元和电源，并用于提供动态可变输出信号。

公开(公告)号：US5668464A

公开(公告)日：1997-09-16

申请号：US736787

申请日：1996-10-25

申请人： Philip T. Krein ,  Pallab Midya

发明人： Philip T. Krein ,  Pallab Midya

IPC分类号： G05F1/565 ,  H02M1/14 ,  G05F1/24

CPC分类号： H02M1/14 ,  G05F1/565

摘要： An active filter provides ripple cancellation in a DC-DC converter. The feedforward filter applies to any converter with an output filter inductor. The filter is inherently stable, performs in both continuous and discontinuous conduction modes, and applies to resonant converters. A suitable linear amplifier, combined with a current transformer, results in a low loss implementation. An adaptive tuning scheme compensates for inductance variation and drift. The filter is usable with buck, push-pull, and boost converter topologies. The result is output ripple below 10 mV.sub.RMS. The filter is effective on converters with outputs as low as 2 V and currents beyond 30 A.

摘要翻译： 有源滤波器在DC-DC转换器中提供纹波消除。 前馈滤波器适用于任何带有输出滤波电感的转换器。 滤波器本质上是稳定的，在连续传导模式和不连续导通模式下均可实现，并适用于谐振转换器。 与电流互感器组合的合适的线性放大器导致低损耗实现。 自适应调谐方案补偿电感变化和漂移。 该滤波器可用于降压，推挽和升压转换器拓扑。 结果是输出纹波低于10 mVRMS。 该滤波器对输出低至2 V，电流超过30 A的转换器有效。

公开(公告)号：US20160380597A1

公开(公告)日：2016-12-29

申请号：US13407506

申请日：2012-02-28

申请人： Pallab Midya

发明人： Pallab Midya

IPC分类号： H03F1/02 ,  H03F3/24 ,  H03F3/193

CPC分类号： H03F1/0238 ,  H02M3/158 ,  H03F3/195 ,  H03F3/245 ,  H03F2200/102 ,  H03F2200/351 ,  H03F2200/451 ,  H03F2200/78

摘要： A tracking power converter for a radio frequency power amplifier includes a boost converter circuit, a switching network circuit, a filter circuit, and a controller circuit. The boost converter circuit provides a boosted voltage in response to a battery voltage. The switching network provides a switching signal in response to the boosted voltage, a first switch enable signal, a second switch enable signal, and a third switch enable signal. The filter circuit provides a power converter output voltage in response to the switching signal. The controller circuit provides the first switch enable signal, the second switch enable signal, and the third switch enable signal in response to a predetermined reference voltage, the switching voltage, the boosted voltage, and the battery voltage.

摘要翻译： 用于射频功率放大器的跟踪功率转换器包括升压转换器电路，开关网络电路，滤波器电路和控制器电路。 升压转换器电路响应于电池电压而提供升压电压。 开关网络响应于升压电压，第一开关使能信号，第二开关使能信号和第三开关使能信号而提供开关信号。 滤波电路响应于开关信号提供功率转换器输出电压。 响应于预定参考电压，开关电压，升压电压和电池电压，控制器电路提供第一开关使能信号，第二开关使能信号和第三开关使能信号。