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1. 发明申请

US20170353108A1 SPREAD SPECTRUM CLOCK GENERATOR AND METHOD 审中-公开
公开(公告)号：US20170353108A1
公开(公告)日：2017-12-07
申请号：US15245467
申请日：2016-08-24
申请人： SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
发明人： Dieter Jozef JOOS , David Pierre Jean Robert LEVACQ , Johan Camiel Julia JANSSENS
IPC分类号： H02M3/158 , H03B5/20 , H02M3/157
CPC分类号： H02M3/158 , H02M1/44 , H02M3/157 , H03B5/20 , H03B23/00 , H03K3/0231 , H04B1/69 , H04B15/06 , H04B2215/067
摘要： In one form, a spread spectrum clock generator includes an oscillator and a digital modulator. The oscillator has a control input for setting an output frequency, and an output for providing a clock output signal. The digital modulator is responsive to the clock output signal to provide a control code to the control input of the oscillator as a periodic signal with a plurality of discrete steps, wherein the digital modulator provides said control code at each of said plurality of discrete steps for substantially a predetermined time.

2. 发明授权

US09264269B2 Electro-magnetic interference reduction for switched signal systems 有权
公开(公告)号：US09264269B2
公开(公告)日：2016-02-16
申请号：US14575574
申请日：2014-12-18
申请人： Marvell World Trade Ltd.
发明人： Kapil Jain
IPC分类号： H03K7/08 , H04L25/49 , H04B15/06
CPC分类号： H04L25/4902 , H04B15/06 , H04B2215/064 , H04B2215/067
摘要： In one embodiment, a method receives a pulse width modulation signal. A value that is a function of the pulse width modulation signal is determined. The value is used to modulate a switching frequency of the pulse width modulation signal to generate a modulated pulse width modulation signal. The applied value reduces electro-magnetic interference from tones in the modulated pulse width modulation signal.

3. 发明申请

US20150331656A1 SYSTEMS AND METHODS FOR REDUCING DIGITAL INTERFERENCE OF EXTERNAL SIGNALS 有权
标题翻译：减少外部信号数字干扰的系统和方法
公开(公告)号：US20150331656A1
公开(公告)日：2015-11-19
申请号：US14276237
申请日：2014-05-13
申请人： Cirrus Logic, Inc.
发明人： John L. Melanson , John C. Tucker
IPC分类号： G06F3/16 , G05B15/02
CPC分类号： H04B15/04 , G05B15/02 , G05F1/14 , G06F1/08 , G06F3/165 , H04B2215/067 , H04B2215/068
摘要： A mobile device may include a digital data driver and digital data receiver for communication of digital signals within the mobile device at a selected clock rate. The mobile device may also have a device external for the digital data driver and digital data receiver for communication of external signals, such as radio-frequency signals, to and from the mobile device. To avoid interference of frequency harmonics of a digital signal with such external signals, the digital data driver may be configured to control the digital signal based on the frequency of the external signals, such that interference of the external signal by spectral content of the digital signal is minimized, while maintaining the selected clock rate.
摘要翻译：移动设备可以包括数字数据驱动器和数字数据接收器，用于以选定的时钟速率在移动设备内通信数字信号。移动设备还可以具有用于数字数据驱动器的外部设备和数字数据接收器，用于将外部信号（例如射频信号）传送到移动设备和从移动设备通信。为了避免数字信号与这种外部信号的频率谐波的干扰，数字数据驱动器可以被配置为基于外部信号的频率来控制数字信号，使得通过数字信号的频谱内容对外部信号的干扰同时保持选定的时钟频率。

4. 发明授权

US09042499B2 Radio frequency (RF) receivers with whitened digital clocks and related methods 有权
标题翻译：具有白化数字时钟和相关方法的射频（RF）接收机
公开(公告)号：US09042499B2
公开(公告)日：2015-05-26
申请号：US14062958
申请日：2013-10-25
申请人： Silicon Laboratories Inc.
发明人： Michael R. May , Scott T. Haban
IPC分类号： H03D1/04 , H03D1/06 , H03K5/01 , H03K6/04 , H04B1/10 , H04L1/00 , H04L25/08 , H04B1/12
CPC分类号： H04B1/12 , H04B15/06 , H04B2215/067
摘要： Radio frequency (RF) receivers having whitened digital clocks and related methods are disclosed. Disclosed embodiments generate whitened clocks having random variations that are used to operate digital processing blocks so that interference created by the whitened clocks is seen as white noise within the received RF signal spectrum. RF input signals are received by RF front-ends (RFFEs) that output analog signals associated with channels within the RF input signals. These analog signals are converted to digital information and processed by digital receive path circuitry that outputs digital data associated with the channel. The digital receive path circuitry includes a whitened clock generator that generates a whitened clock having random variations and which a digital processing block that operates based upon the whitened clock. Further, the RFFE and the digital receive path circuitry are located within a single integrated circuit.
摘要翻译：公开了具有白化数字时钟和相关方法的射频（RF）接收机。公开的实施例产生具有用于操作数字处理块的随机变化的白化时钟，使得由白化时钟产生的干扰在接收的RF信号频谱内被视为白噪声。 RF输入信号由RF前端（RFFE）接收，RF前端输出与RF输入信号内的信道相关的模拟信号。这些模拟信号被转换成数字信息并由数字接收路径电路进行处理，该电路输出与该信道相关联的数字数据。数字接收路径电路包括白化时钟发生器，其产生具有随机变化的白化时钟，以及基于白化时钟操作的数字处理块。此外，RFFE和数字接收路径电路位于单个集成电路内。

5. 发明申请

US20150117573A1 Radio Frequency (RF) Receivers With Whitened Digital Clocks And Related Methods 有权
标题翻译：带有美白数字时钟的射频（RF）接收机及相关方法
公开(公告)号：US20150117573A1
公开(公告)日：2015-04-30
申请号：US14062958
申请日：2013-10-25
申请人： Silicon Laboratories Inc.
发明人： Michael R. May , Scott T. Haban
IPC分类号： H04B1/12
CPC分类号： H04B1/12 , H04B15/06 , H04B2215/067
摘要： Radio frequency (RF) receivers having whitened digital clocks and related methods are disclosed. Disclosed embodiments generate whitened clocks having random variations that are used to operate digital processing blocks so that interference created by the whitened clocks is seen as white noise within the received RF signal spectrum. RF input signals are received by RF front-ends (RFFEs) that output analog signals associated with channels within the RF input signals. These analog signals are converted to digital information and processed by digital receive path circuitry that outputs digital data associated with the channel. The digital receive path circuitry includes a whitened clock generator that generates a whitened clock having random variations and which a digital processing block that operates based upon the whitened clock. Further, the RFFE and the digital receive path circuitry are located within a single integrated circuit.
摘要翻译：公开了具有白化数字时钟和相关方法的射频（RF）接收机。公开的实施例产生具有用于操作数字处理块的随机变化的白化时钟，使得由白化时钟产生的干扰在接收的RF信号频谱内被视为白噪声。 RF输入信号由RF前端（RFFE）接收，RF前端输出与RF输入信号内的信道相关的模拟信号。这些模拟信号被转换成数字信息并由数字接收路径电路进行处理，该电路输出与该信道相关联的数字数据。数字接收路径电路包括白化时钟发生器，其产生具有随机变化的白化时钟，以及基于白化时钟操作的数字处理块。此外，RFFE和数字接收路径电路位于单个集成电路内。

6. 发明授权

US08929430B2 Electro-magnetic interference reduction for switched signal systems 有权
标题翻译：开关信号系统的电磁干扰降低
公开(公告)号：US08929430B2
公开(公告)日：2015-01-06
申请号：US13219528
申请日：2011-08-26
申请人： Kapil Jain
发明人： Kapil Jain
IPC分类号： H03K7/08 , H04B15/06
CPC分类号： H04L25/4902 , H04B15/06 , H04B2215/064 , H04B2215/067
摘要： In one embodiment, a method receives a pulse width modulation signal. A value that is a function of the pulse width modulation signal is determined. The value is used to modulate a switching frequency of the pulse width modulation signal to generate a modulated pulse width modulation signal. The applied value reduces electro-magnetic interference from tones in the modulated pulse width modulation signal.
摘要翻译：在一个实施例中，一种方法接收脉宽调制信号。确定作为脉宽调制信号的函数的值。该值用于调制脉宽调制信号的开关频率以产生调制脉宽调制信号。所应用的值可以减小调制脉宽调制信号中的音调的电磁干扰。

7. 发明授权

US08723577B2 Spreading a clock signal 有权
标题翻译：传播时钟信号
公开(公告)号：US08723577B2
公开(公告)日：2014-05-13
申请号：US13554716
申请日：2012-07-20
申请人： Steve Felix
发明人： Steve Felix
IPC分类号： H03K3/00
CPC分类号： H04B15/06 , G06F1/10 , H04B2215/067
摘要： Method, circuitry and device for spreading a clock signal in which the clock signal is received at an input of a variable delay line, the clock signal having been generated by a clock signal generator. In one embodiment, for each edge of the clock signal, the delay introduced by the variable delay line is set in accordance with a stored delay value. For each of a plurality of consecutive edges of the clock signal, the stored delay value is either incremented or decremented based on a randomly generated value for that edge. A spread version of the clock signal is output from the variable delay line, wherein each edge of the spread version of the clock signal is delayed by the respective delay that is set for that edge of the clock signal.
摘要翻译：方法，电路和装置，用于扩展在可变延迟线的输入处接收时钟信号的时钟信号，时钟信号由时钟信号发生器产生。在一个实施例中，对于时钟信号的每个边沿，根据所存储的延迟值来设置由可变延迟线引入的延迟。对于时钟信号的多个连续边缘中的每一个，基于该边缘的随机生成的值，所存储的延迟值被递增或递减。从可变延迟线输出时钟信号的扩展版本，其中时钟信号的扩展版本的每个边沿被延迟针对时钟信号的该边缘设置的相应延迟。

8. 发明申请

US20130235906A1 Electronic Device with Dynamic Noise Spectrum Control 有权
标题翻译：具有动态噪声频谱控制的电子设备
公开(公告)号：US20130235906A1
公开(公告)日：2013-09-12
申请号：US13417078
申请日：2012-03-09
申请人： Moon Jung Kim , Geertjan Joordens , Paolo Sacchetto , Wonjae Choi , Altan N. Yazar , Jaydeep V. Ranade
发明人： Moon Jung Kim , Geertjan Joordens , Paolo Sacchetto , Wonjae Choi , Altan N. Yazar , Jaydeep V. Ranade
IPC分类号： H04B1/7097 , H04L25/08 , H04B15/00
CPC分类号： H03L7/00 , H04B1/123 , H04B15/06 , H04B2215/067
摘要： An electronic device may contain clock circuits, transmitters, and other circuits that serve as sources of noise signals. The noise signals may be characterized by a noise spectrum. The noise spectrum produced by a noise source can be adjusted by adjusting spread spectrum clock circuitry in a clock circuit, by adjusting data scrambling circuitry in a transmitter circuit, or by making other dynamic adjustments to the circuitry of the electronic device. During operation of the electronic device, sensitive circuitry in the device such as wireless receiver circuitry may be adversely affected by the presence of noise from a noise source in the device. Based on information such as which receiver bands and/or channels are being actively received and target sensitivity levels for the receiver circuitry, control circuitry within the electronic device can determine in real time how to minimize interference between the noise source and the wireless receiver circuitry.
摘要翻译：电子设备可以包含用作噪声信号源的时钟电路，发射器和其它电路。噪声信号可以由噪声谱表征。可以通过调整时钟电路中的扩频时钟电路，通过调整发射机电路中的数据加扰电路，或通过对电子设备的电路进行其他动态调整来调整由噪声源产生的噪声频谱。在电子设备的操作期间，诸如无线接收器电路的设备中的敏感电路可能受到来自设备中的噪声源的噪声的存在的不利影响。基于诸如接收机频带和/或频道被主动接收的信息以及接收机电路的目标灵敏度级别，电子设备内的控制电路可以实时地确定如何最小化噪声源和无线接收机电路之间的干扰。

9. 发明授权

US08385485B2 Adaptive control of clock spread to mitigate radio frequency interference 有权
标题翻译：自适应控制时钟扩展以减轻射频干扰
公开(公告)号：US08385485B2
公开(公告)日：2013-02-26
申请号：US13018725
申请日：2011-02-01
申请人： Harry Skinner , Michael E. Deisher , Chaitanya Sreerama
发明人： Harry Skinner , Michael E. Deisher , Chaitanya Sreerama
IPC分类号： H03D1/04
CPC分类号： H04B15/02 , H04B2215/067
摘要： In some embodiments an adaptive clocking controller determines a clock spread of a system clock that would result in a lowest total interference between a channel received by a radio receiver and the system clock. A clock generator modifies a spread of the system clock in response to the determined clock spread. Other embodiments are described and claimed.
摘要翻译：在一些实施例中，自适应计时控制器确定系统时钟的时钟扩展，其将导致由无线电接收机接收的信道与系统时钟之间的最低总干扰。时钟发生器响应于确定的时钟扩展来修改系统时钟的扩展。描述和要求保护其他实施例。

10. 发明授权

US08155165B2 Method of characterizing parameters and removing spectral components of a spread spectrum clock in a communications signal 有权
标题翻译：在通信信号中表征参数和去除扩频时钟的频谱分量的方法
公开(公告)号：US08155165B2
公开(公告)日：2012-04-10
申请号：US12211009
申请日：2008-09-15
申请人： Maria Agoston , Laszlo J. Dobos , Pavel R. Zivny
发明人： Maria Agoston , Laszlo J. Dobos , Pavel R. Zivny
IPC分类号： H04B1/00
CPC分类号： H04B15/02 , H04B2215/067
摘要： Parameters of a spread spectrum clock signal in a communication signal are characterized by acquiring voltage samples of the communication signal at a nominal time location of an edge of the communication signal. The voltage samples are converted to time samples and the difference between the maximum and minimum time values is determined at the nominal time location. A spread spectrum clock magnitude number is generated by dividing the difference between the maximum and minimum time values by the nominal time location of the acquired voltage samples of the spread spectrum clock signal. A spread spectrum modulation profile of a spread spectrum clock signal is estimated by over sampling the time samples using an aliased index value to generate over sampled triangular waveforms representing the spread spectrum clock modulation profile. One of the over sampled triangular waveforms is use to generate the spread spectrum clock modulation profile.
摘要翻译：通信信号中的扩频时钟信号的参数的特征在于在通信信号的边缘的标称时间位置处获取通信信号的电压采样。将电压样本转换为时间采样，并在标称时间位置确定最大和最小时间值之间的差值。通过将最大和最小时间值之间的差除以所获取的扩频时钟信号的电压样本的标称时间位置来产生扩频时钟幅度数。通过使用混叠索引值对时间采样进行过采样来估计扩频时钟信号的扩频调制分布，以产生表示扩频时钟调制分布的过采样三角波。一个过采样三角波形用于产生扩频时钟调制曲线。

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