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公开(公告)号：US07965157B2
公开(公告)日：2011-06-21
申请号：US11996252
申请日：2005-07-20
申请人： Yong Ping Xu , Rui Yu
发明人： Yong Ping Xu , Rui Yu
摘要： Briefly, in accordance with one embodiment of the invention, a resonator such as an electromechanical resonator may be coupled with a cancellation network to reduce and/or cancel an anti-resonance effect in the resonator, which may be due to, for example, a static capacitance inherent in the resonator. Cancellation of an anti resonance effect from the resonator response may allow a resonance effect of the resonator to be a predominant effect to allow the resonator to be utilized as a bandpass filter having a relatively higher Q, for example in a bandpass sigma-delta modulator that may be utilized in a digital RF receiver.
摘要翻译： 简而言之，根据本发明的一个实施例，诸如机电谐振器的谐振器可以与消除网络耦合以减少和/或消除谐振器中的抗共振效应，这可能是由于例如 谐振器固有的静态电容。 从谐振器响应消除反共振效应可以允许谐振器的共振效应是主要效应，以允许谐振器被用作具有相对较高Q的带通滤波器，例如在带通Σ-Δ调制器 这可以用在数字RF接收机中。
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公开(公告)号：USRE41518E1
公开(公告)日：2010-08-17
申请号：US11496085
申请日：2006-07-27
申请人： Yong-Ping Xu
发明人： Yong-Ping Xu
摘要： A bandpass sigma-delta modulator using acoustic resonators or micro-mechanical resonators. In order to improve resolution at high frequencies, acoustic resonators or micro-mechanical resonators are utilized in a sigma-delta modulator instead of electronic resonators. The quantized output is fed back using a pair of D/A converters to an input summation device. In fourth order devices, the feed back is to two summation devices in series. Such a sigma-delta modulator is usable in a software defined radio cellular telephone system and in other applications where high-frequency and high-resolution A/D conversion is required.
摘要翻译： 使用声谐振器或微机械谐振器的带通Σ-Δ调制器。 为了提高高频分辨率，在Σ-Δ调制器中代替电子谐振器使用声谐振器或微机械谐振器。 量化输出使用一对D / A转换器反馈到输入求和装置。 在四阶装置中，反馈是串联的两个求和装置。 这种Σ-Δ调制器可用于软件定义的无线电蜂窝电话系统以及需要高频和高分辨率A / D转换的其它应用中。
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公开(公告)号：US20100097258A1
公开(公告)日：2010-04-22
申请号：US12519904
申请日：2007-12-19
申请人： Kimmo Koli
发明人： Kimmo Koli
IPC分类号： H03M1/12
摘要： An apparatus, having as an input an analog signal, is provided. The apparatus comprises a first circuit comprising an impedance transferring circuit configured to band pass filter the input signal, obtaining a filtered signal; the impedance transferring circuit comprising: a transconductance amplifier (1102), and a switching arrangement (1106, 1108) and an impedance circuit (404) connected in series, the switching arrangement being configured to switch the impedance of the impedance circuit of the impedance transferring circuit from base band to the frequency of the input signal. The apparatus further comprises a second circuit (1112) configured to perform down mixing to the filtered signal obtaining a base band signal and a feedback loop connecting the base band signal to the switching arrangement (1114, 1116) and the impedance circuit, the signal of the feedback loop configured to control the properties of the first circuit.
摘要翻译： 提供一种具有模拟信号作为输入的装置。 该装置包括：第一电路，包括被配置为对输入信号进行带通滤波的阻抗传输电路，获得滤波信号; 所述阻抗传输电路包括：跨导放大器（1102），以及串联连接的开关装置（1106,1108）和阻抗电路（404），所述开关装置被配置为切换阻抗传输的阻抗电路的阻抗 电路从基带到输入信号的频率。 该装置还包括第二电路（1112），被配置为对已滤波的信号执行下混频，获得基带信号和将基带信号连接到开关装置（1114,1116）和阻抗电路的反馈环路， 所述反馈回路被配置为控制所述第一电路的特性。
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公开(公告)号：US07307564B1
公开(公告)日：2007-12-11
申请号：US10973741
申请日：2004-10-25
申请人： Todd Kaplan
发明人： Todd Kaplan
IPC分类号： H03M3/00
摘要： A distributed resonator or filter in a continuous-time delta-sigma modulator is disclosed, where the transfer function of the resonator or filter repeats every FS, where FS is the sampling frequency of the modulator. On one side, like continuous-time delta-sigma modulators, the disclosed modulator does not require a high-precision track-and-hold, and additionally can take advantage of the high Q of distributed resonators. On the other side, like discrete-time delta-sigma modulators, the disclosed modulator is insensitive to feedback loop delays and can subsample.
摘要翻译： 公开了连续时间Δ-Σ调制器中的分布式谐振器或滤波器，其中谐振器或滤波器的传递函数在每个F S S S上重复，其中F S S 调制器的采样频率。 一方面，像连续时间Δ-Σ调制器一样，所公开的调制器不需要高精度的跟踪保持，并且还可以利用高Q分布式谐振器。 另一方面，像离散时间Δ-Σ调制器一样，所公开的调制器对反馈回路延迟不敏感并且可以进行子采样。
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公开(公告)号：US06768435B2
公开(公告)日：2004-07-27
申请号：US10188071
申请日：2002-07-03
申请人： Yong-Ping Xu
发明人： Yong-Ping Xu
IPC分类号： H03M300
摘要： A bandpass sigma-delta modulator using acoustic resonators or micro-mechanical resonators. In order to improve resolution at high frequencies, acoustic resonators or micro-mechanical resonators are utilized in a sigma-delta modulator instead of electronic resonators. The quantized output is fed back using a pair of D/A converters to an input summation device. In fourth order devices, the feed back is to two summation devices in series. Such a sigma-delta modulator is usable in a software defined radio cellular telephone system and in other applications where high-frequency and high-resolution A/D conversion is required.
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公开(公告)号：US5768315A
公开(公告)日：1998-06-16
申请号：US684716
申请日：1996-07-22
CPC分类号： H03H19/004 , H03M3/404 , H03M3/43 , H03M3/454
摘要： A communication receiver (600) utilizes a band-pass sigma-delta converter (100) for receiving a radio signal. The band-pass sigma-delta converter (100) includes a comparator (106) coupled to an adder-filter (101) for making a comparison between a predetermined reference level (110) and an intermediate signal (125), and for generating a comparison result signal (114) responsive to the comparison. A storage element (108) is used for storing the comparison result signal (114) for a predetermined delay period, thereby producing a clocked output signal (118). The adder-filter (101) is coupled to an analog signal (103) and to the clocked output signal (118) for subtracting the clocked output signal (118) from the analog signal (103) to produce a difference signal (120) that is filtered by a commutating filter (400) for generating the intermediate signal (125) responsive to the difference signal (120).
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公开(公告)号：US20240154621A1
公开(公告)日：2024-05-09
申请号：US18510803
申请日：2023-11-16
申请人： Acceleware Ltd.
CPC分类号： H03M3/404 , H03M1/12 , H04L7/0029
摘要： Systems and methods for asynchronous data communication are disclosed. The system includes one or more peripheral devices, a processing device, and one or more communication channels. Each peripheral device includes a peripheral clock and a quantizer. The processing device is remotely located from each peripheral device and includes a processor clock that is asynchronous with at least one peripheral clock, an analog continuous time filter, and an analog-to-digital converter. The analog continuous time filter filters one or more quantized signals generated by the one or more peripheral devices to generate one or more filtered signals. The analog continuous time filter has a filter bandwidth corresponding to a signal bandwidth of one or more analog time varying signals represented by the one or more quantized signals. The analog-to-digital converter generates one or more converted signals by sampling the one or more filtered signals based on a processor clock signal.
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公开(公告)号：US20190131999A1
公开(公告)日：2019-05-02
申请号：US16092883
申请日：2017-04-12
发明人： Florian HÜHN
CPC分类号： H03M3/404 , H03F3/189 , H03F3/217 , H03F3/38 , H03F3/387 , H03F2200/339 , H04L27/2092
摘要： The present invention relates to a modulator for a digital amplifier and a device comprising such a modulator and a digital amplifier.The modulator (100) comprises a pulse shaper (110) and a control unit (120) for controlling the pulse shaper (110) to convert an input signal into a bit stream (130) configured for a digital amplifier which encodes an amplitude value per clock of a carrier signal. The pulse shaper (110) can represent a respective amplitude value of the input signal with different bit patterns. The bit pattern respectively used by the pulse shaper is determined by the control unit (120) by means of a corresponding, associated control command. The modulator (100) is characterized in that in the control unit (120) an assignment (160) of the control commands to associated amplitude values resulting from amplification of the associated bit patterns with the digital amplifier (400) is stored or at least is provided in that the control unit (120) selects a control command per clock by means of the assignment (160) and the amplitude value of the input signal and drives the pulse shaper (110) accordingly.
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公开(公告)号：US09680498B2
公开(公告)日：2017-06-13
申请号：US14944182
申请日：2015-11-17
CPC分类号： H03M3/404 , G06F17/10 , H03M3/358 , H03M3/386 , H03M3/422 , H03M3/436 , H03M3/468 , H03M3/498
摘要： Provided are, among other things, systems, apparatuses, methods and techniques for converting a continuous-time, continuously variable signal into a sampled and quantized signal. One such apparatus includes an input line for accepting an input signal that is continuous in time and continuously variable, multiple processing branches coupled to the input line, and an adder coupled to outputs of the processing branches. Each of the processing branches includes a continuous-time quantization-noise-shaping circuit, a sampling/quantization circuit coupled to an output of the continuous-time quantization-noise-shaping circuit, a digital bandpass filter coupled to an output of the sampling/quantization circuit, and a line coupling an output of the digital-to-analog converter circuit back into the continuous-time quantization-noise-shaping circuit. A center frequency of the digital bandpass filter in each the processing branch corresponds to a minimum in a quantization noise transfer function for the continuous-time quantization-noise-shaping circuit in the same processing branch.
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公开(公告)号：US09025700B2
公开(公告)日：2015-05-05
申请号：US14365885
申请日：2011-12-16
CPC分类号： H04L27/367 , H03F3/2175 , H03M3/404 , H04L25/4927
摘要： A digital polar modulator (DPM) for transforming a baseband signal into a modulated digital modulator output signal comprises an input unit and two low-pass delta-sigma modulators, a first one being connected downstream from the first input part and configured to provide at its output a first pulse train in dependence on an amplitude- modulating baseband signal component, and a second one being connected downstream from the second input part and configured to provide at its output a multilevel quantized signal in dependence on a phase modulating baseband signal component; a multiphase generator, which is configured to provide a set of square-wave carrier signals having a common carrier frequency and exhibiting discrete phase shifts with respect to each other; a multiplexer, which is configured to provide a multiplexer output signal that is formed by switching, in dependence on a signal received at a select input as a function of time, between selected ones of the carrier signals; and a combiner unit.
摘要翻译： 用于将基带信号变换为调制数字调制器输出信号的数字极调制器（DPM）包括输入单元和两个低通Δ-Σ调制器，第一个调制器连接在第一输入部分的下游， 根据幅度调制基带信号分量输出第一脉冲序列，第二脉冲序列连接在第二输入部分的下游，并且被配置为根据相位调制基带信号分量在其输出端提供多级量化信号; 多相发生器，其被配置为提供具有相同载波频率并且相对于彼此呈现离散相移的一组方波载波信号; 多路复用器，其被配置为提供多路复用器输出信号，所述多路复用器输出信号通过根据在选择输入端接收的信号作为时间的函数在所选择的载波信号之间进行切换而形成; 和组合器单元。
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