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公开(公告)号：US20110051833A1
公开(公告)日：2011-03-03
申请号：US12551495
申请日：2009-08-31
CPC分类号： H04B1/525
摘要： A transceiver mitigates signal leakage into a receive path from a transmit path. A subtraction circuit determines a difference between a receive signal and a compensation signal to produce a compensated receive signal prior to demodulation by a demodulator. An equalizer both amplitude adjusts and phase adjusts orthogonal baseband transmit signals based on the difference from the subtraction circuit to produce the compensation signal. A digital tuning circuit determines at least one amplitude adjust coefficient to be used by the equalizer. The equalizer can have a polarity switch or a variable attenuator or a variable delay.
摘要翻译： 收发信机从发送路径减轻信号泄漏到接收路径。 减法电路确定接收信号和补偿信号之间的差异，以在由解调器解调之前产生经补偿的接收信号。 均衡器两者都基于与减法电路的差异来调整和相位调整正交基带发射信号，产生补偿信号。 数字调谐电路确定要由均衡器使用的至少一个幅度调整系数。 均衡器可以具有极性开关或可变衰减器或可变延迟。
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12.发明授权Digital saturation handling in integral noise shaping of pulse width modulation 有权数字饱和处理在脉冲宽度调制的积分噪声整形中公开(公告)号：US07227487B1
公开(公告)日：2007-06-05
申请号：US11273286
申请日：2005-11-14
IPC分类号： H03M1/82
摘要： An audio amplifier includes a digital signal processor (DSP) that contains a noise shaping quantizer having an integrating error amplifier. The integrating error amplifier contains integrators connected in a feedback loop, a summer supplied with an output of each of the integrators, and a saturation function module producing a saturation function. A multiplier is disposed between each pair of adjacent integrators. The multiplier receives a signal from one of the adjacent integrators and the saturation function and supplies a signal to the other of the adjacent integrators. The saturation function decreases the effect of all of the integrators except an integrator to which an input signal to the integrating amplifier is supplied using an input signal to and/or an output signal from the noise shaping quantizer. This permits the duty ratio of the output signal from the noise shaping quantizer to extend from 0% to 100%.
摘要翻译： 音频放大器包括包含具有积分误差放大器的噪声整形量化器的数字信号处理器（DSP）。 积分误差放大器包含连接在反馈回路中的积分器，与每个积分器的输出相加的夏季以及产生饱和功能的饱和功能模块。 在每对相邻的积分器之间设置乘法器。 乘法器接收来自相邻积分器之一的信号和饱和度函数，并向相邻的积分器中的另一个提供信号。 饱和功能降低了除了积分器之外的所有积分器的影响，使用来自噪声整形量化器的输入信号和/或来自噪声整形量化器的输出信号向积分放大器提供输入信号。 这允许来自噪声整形量化器的输出信号的占空比从0％延伸到100％。
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13.发明授权Method and apparatus for switching amplification having variable sample point and variable order correction 有权用于开关具有可变采样点和可变阶校正的放大的方法和装置公开(公告)号：US06922100B2
公开(公告)日：2005-07-26
申请号：US10629203
申请日：2003-07-29
CPC分类号： H03F3/2173 , H03F1/32 , H03F1/3247 , H03F3/185 , H03F3/2171
摘要： Disclosed is a method and/or apparatus for adjusting the sample time and order associated with a digital correction system for maximizing output power and minimizing power stage delay sensitivity of a switching power stage. In certain embodiments, the sample point of an ADC may be changed as a function of the duty ratio of the PWM signal thus allowing higher performance and use of less expensive power stage components. In addition, adjustment of the order of an integrating error amplifier in the system permits operation of the power stage with an output being permitted to saturate up to the power supply rails, thus increasing a power output of the power stage.
摘要翻译： 公开了一种用于调整与数字校正系统相关联的采样时间和顺序的方法和/或装置，以最大化输出功率并最小化开关功率级的功率级延迟灵敏度。 在某些实施例中，ADC的采样点可以作为PWM信号的占空比的函数而改变，从而允许更高性能和更便宜的功率级组件的使用。 此外，系统中的积分误差放大器的顺序的调整允许功率级的操作，允许输出饱和直到电源轨，从而增加功率级的功率输出。
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14.发明授权Circuitry for converting a sampled digital signal to a naturally sampled digital signal and method therefor 有权用于将采样的数字信号转换为自然采样的数字信号的电路及其方法公开(公告)号：US06665338B1
公开(公告)日：2003-12-16
申请号：US09478024
申请日：2000-01-05
IPC分类号： H03K908
摘要： Embodiments of the present invention deal generally with circuitry and methods for converting a sampled digital signal (32) to a naturally sampled digital signal (34). One embodiment relating to a method includes receiving the sampled digital signal, calculating a duty ratio estimate (33) using feedback (52), and using interpolation (62) to determine the naturally sampled digital signal. Circuitry for converting a sampled digital signal (32) to a naturally sampled digital signal (34) includes a natural sampler, where the natural sampler includes an input to receive the sampled digital signal (32) and an input to receive a feedback signal (52). The natural sampler has an output to provide the naturally sampled digital signal (34). In one embodiment, the natural sampler calculates a duty ratio (33) using the feedback signal (52) and uses interpolation to determine the naturally sampled digital signal (34).
摘要翻译： 本发明的实施例总体上涉及将采样数字信号（32）转换为自然采样的数字信号（34）的电路和方法。 与方法相关的一个实施例包括接收采样的数字信号，使用反馈（52）计算占空比估计（33），并使用内插（62）来确定自然采样的数字信号。 用于将采样数字信号（32）转换为自然采样数字信号（34）的电路包括自然采样器，其中自然采样器包括用于接收采样数字信号（32）的输入端和接收反馈信号（52 ）。 自然采样器具有输出以提供自然采样的数字信号（34）。 在一个实施例中，自然采样器使用反馈信号（52）计算占空比（33），并使用内插来确定自然采样的数字信号（34）。
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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。
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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).
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公开(公告)号：US5586149A
公开(公告)日：1996-12-17
申请号：US351854
申请日：1994-12-07
CPC分类号： H04L7/0054 , G06J1/00 , H03M1/1009 , H04L7/033 , H04L7/0334
摘要： An interference dependent adaptive phase clock controller method and system includes synthesis of a signal processing clock signal (307). An interference signal (311 ) dependent on a phase of the signal processing clock signal is measured, and a phase correction signal (317) is provided dependent thereon. A magnitude of the interference signal is reduced by adjusting the phase of the signal processing clock signal (307) dependent on the phase correction signal (317).
摘要翻译： 干扰相关自适应相位时钟控制器方法和系统包括信号处理时钟信号的合成（307）。 测量取决于信号处理时钟信号的相位的干扰信号（311），并依赖于相位校正信号（317）。 通过根据相位校正信号（317）调整信号处理时钟信号（307）的相位来减小干扰信号的大小。
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公开(公告)号：US07382039B2
公开(公告)日：2008-06-03
申请号：US11349608
申请日：2006-02-08
IPC分类号： H01L21/50
CPC分类号： H01L23/585 , H01L23/60 , H01L2924/0002 , H01L2924/3011 , H01L2924/00
摘要： An edge seal structure and fabrication method are described. The edge seal structure includes a high impedance substrate containing a base material and a grounded floating edge seal that is on the substrate but is isolated from the base material. The edge seal contacts a first doped well in the substrate that has the same conductivity type as and is more heavily doped than the base material. The first doped well is in a second doped well that has a different conductivity type than the first doped well. The first and second doped wells and the base material form back-to-back series connected diodes. The wells are effectively connected to power and ground such that the diodes are reverse-biased. The edge seal is formed by a stack of conductive layers, at least some of which are surrounded by a stack of insulating layers.
摘要翻译： 描述了边缘密封结构和制造方法。 边缘密封结构包括含有基材的高阻抗衬底和位于衬底上但与基底材料隔离的接地浮动边缘密封。 边缘密封接触衬底中的第一掺杂阱，其具有与基底材料相同的导电类型和比基底材料更重的掺杂。 第一掺杂阱位于具有与第一掺杂阱不同的导电类型的第二掺杂阱中。 第一和第二掺杂阱和基体材料形成背对背串联连接的二极管。 这些阱有效地连接到电源和接地，使得二极管被反向偏置。 边缘密封由一叠导电层形成，其中至少一些被一叠绝缘层包围。
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19.发明授权Apparatus and method for minimizing the turn on time for a receiver operating in a discontinuous receive mode 失效用于最小化以不连续接收模式操作的接收器的接通时间的装置和方法
公开(公告)号：US5678227A
公开(公告)日：1997-10-14
申请号：US282668
申请日：1994-07-29
CPC分类号： H04W52/0245 , H04W88/022 , Y02B60/50
摘要： In a communication unit a receiver (104) receives a modulated signal (118), and produces a received signal (120) having a parameter. The receiver (104) has a discontinuous receive mode of operation, wherein the receiver (104) is permitted to be turned on and off. Receiver circuitry (105) receives the received signal (120), and produces an output signal (124) having a parameter. A controller (110) adjusts a value of the parameter of the output signal (124), responsive to a value of the parameter of the received signal (120), during the times when the receiver (140) is turned on; and holds the value of the parameter of the output signal (124), responsive to the value of the parameter of the received signal (120), at the time when the receiver (104) is turned off. The present invention advantageously minimizes the turn on time for the receiver (104) operating in a discontinuous receive mode to save current drain.
摘要翻译： 在通信单元中，接收机（104）接收调制信号（118），并产生具有参数的接收信号（120）。 接收器（104）具有不连续的接收操作模式，其中接收器（104）被允许被打开和关闭。 接收机电路（105）接收接收信号（120），并产生具有参数的输出信号（124）。 响应于接收信号（120）的参数的值，控制器（110）在接收器（140）接通的时间期间调整输出信号（124）的参数的值; 并且当接收器（104）关闭时，响应于接收信号（120）的参数的值，保持输出信号（124）的参数的值。 本发明有利地使以不连续接收模式工作的接收器（104）的导通时间最小化以节省电流消耗。
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公开(公告)号：US06473457B1
公开(公告)日：2002-10-29
申请号：US09307453
申请日：1999-05-07
申请人： Cesar Pascual , William J. Roeckner
发明人： Cesar Pascual , William J. Roeckner
IPC分类号： H03K908
CPC分类号： G11B20/10527 , H03M5/08
摘要： A method and apparatus to produce a pulse width modulated (PWM) signal from pulse code modulated (PCM) data. In one embodiment, a crossing point of an analog signal with the ramp portion of a sawtooth waveform is approximated by first extrapolating, or projecting, a line between two adjacent sample points across other sample points to produce an estimate of the crossing point. A magnitude difference between a crossing point of the extrapolated line and a sample point magnitude on each side of the crossing point is determined. The magnitude difference, multiplied by an empirically determined constant, is added to the estimate. A PWM signal is then produced using the estimate for the crossing point.
摘要翻译： 一种从脉冲编码调制（PCM）数据产生脉宽调制（PWM）信号的方法和装置。 在一个实施例中，模拟信号与锯齿形波形的斜坡部分的交叉点通过首先外推或投影跨越其它采样点的两个相邻采样点之间的线来近似来产生交叉点的估计。 确定外插线的交叉点与交叉点两侧的采样点幅度之间的幅度差。 将幅度差乘以经验确定的常数加到估计值中。 然后使用对于交叉点的估计来产生PWM信号。
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