会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 2. 发明授权
    • Bitwidth reduction in loop filters used for digital PLLS
    • 用于数字PLLS的环路滤波器的带宽减少
    • US08598929B1
    • 2013-12-03
    • US13664536
    • 2012-10-31
    • Christian WicpalekThomas Mayer
    • Christian WicpalekThomas Mayer
    • H03L7/06
    • H03L7/1075H03L7/093H03L7/095H03L7/101H03L7/104
    • The disclosed invention relates to a digital phase locked loop having a switchable digital loop filter configured to selectively operate at different levels of resolution. The digital phase locked loop has a phase frequency detector that determines a phase difference between a reference signal and a feedback signal and to convert the phase difference to a digital word. A digital loop filter filters the digital word to generate a control word. A bit shift network modifies the digital word in a manner that switches the resolution of the digital loop filter between two or more distinct resolution states that comprise a bit sequence located at different positions in the digital word. The two or more distinct resolution states allow the digital loop filter to provide a low resolution (high amplitude) for a settling state of operation and a high resolution (low amplitude) for a locked state of operation.
    • 所公开的本发明涉及一种具有可切换数字环路滤波器的数字锁相环,其被配置为选择性地以不同的分辨率水平进行操作。 数字锁相环具有相位频率检测器,其确定参考信号和反馈信号之间的相位差,并将相位差转换为数字字。 数字环路滤波器对数字字进行滤波以产生控制字。 位移网络以使数字环路滤波器的分辨率在两个或多个不同分辨率状态之间切换的方式修改数字字,该状态包括位于数字字中的不同位置的位序列。 两个或更多个不同的分辨率状态允许数字环路滤波器为操作的建立状态提供低分辨率(高幅度),并且对于锁定操作状态提供高分辨率(低幅度)。
    • 4. 发明授权
    • Estimation and compensation of oscillator nonlinearities
    • 振荡器非线性的估计和补偿
    • US08098104B2
    • 2012-01-17
    • US12578105
    • 2009-10-13
    • Christian WicpalekThomas MayerThomas BauernfeindVolker NeubauerLinus Maurer
    • Christian WicpalekThomas MayerThomas BauernfeindVolker NeubauerLinus Maurer
    • G01R23/00H03L7/00
    • H03L7/099H03B2200/0092H03L7/093H03L7/1976H03L2207/05
    • A device may include an oscillator circuit, a control circuit, a frequency detector circuit, and a processor circuit. The oscillator circuit may include a frequency control input to output an oscillator signal. The frequency of the oscillator signal depends on an input signal applied to the frequency control input. The control circuit is configured to apply a first input signal value, a second input signal value, and a third input signal value to the frequency control input. The frequency detector circuit is configured to detect the first frequency value of the oscillator signal when the first input signal value is applied to the frequency control input, a second frequency value of the oscillator signal when the second input signal value is applied to the frequency control input, and a third frequency value of the oscillator signal when the third input signal value is applied to the frequency control input.
    • 设备可以包括振荡器电路,控制电路,频率检测器电路和处理器电路。 振荡器电路可以包括用于输出振荡器信号的频率控制输入。 振荡器信号的频率取决于施加到频率控制输入的输入信号。 控制电路被配置为向频率控制输入施加第一输入信号值,第二输入信号值和第三输入信号值。 频率检测器电路被配置为当第一输入信号值被施加到频率控制输入时检测振荡器信号的第一频率值,当第二输入信号值被施加到频率控制时,振荡器信号的第二频率值 输入和第三频率值,当第三输入信号值被施加到频率控制输入时。
    • 5. 发明申请
    • Non-Linear-Error Correction in Fractional-N Digital PLL Frequency Synthesizer
    • 分数N数字PLL频率合成器中的非线性误差校正
    • US20140097875A1
    • 2014-04-10
    • US13645760
    • 2012-10-05
    • Stefan TertinekThomas MayerChristian Wicpalek
    • Stefan TertinekThomas MayerChristian Wicpalek
    • H03B21/00
    • H03L7/1976H03L7/085
    • The present disclosure relates to a frequency synthesizer. The frequency synthesizer includes a phase comparator having first and second input nodes. The first input node receives a reference signal having a reference frequency. A channel control block has an input that receives a channel word and an output coupled to the second input node of the phase comparator. A local oscillator (LO) output node provides an LO signal having an LO frequency based on the reference frequency and the channel word. A feedback back couples the LO output node to the second input node of the phase comparator through the channel control block. A non-linear error correction element is operably coupled on a coupling path extending between the phase comparator and the DCO.
    • 本公开涉及频率合成器。 频率合成器包括具有第一和第二输入节点的相位比较器。 第一输入节点接收具有参考频率的参考信号。 信道控制块具有接收信道字的输入和耦合到相位比较器的第二输入节点的输出。 本地振荡器(LO)输出节点基于参考频率和通道字提供具有LO频率的LO信号。 反馈反馈通过信道控制块将LO输出节点耦合到相位比较器的第二输入节点。 非线性误差校正元件可操作地耦合在相位比较器和DCO之间延伸的耦合路径上。
    • 10. 发明授权
    • Phase-locked loop and method for operating a phase-locked-loop
    • 锁相环和操作锁相环的方法
    • US07394320B2
    • 2008-07-01
    • US11584318
    • 2006-10-20
    • Linus MaurerThomas MayerBurkhard NeurauterChristian Wicpalek
    • Linus MaurerThomas MayerBurkhard NeurauterChristian Wicpalek
    • H03L7/00
    • H03L7/18H03L7/081H03L7/091
    • A phase-locked loop suitable for mobile radio communications and a method for operating the same is disclosed. One embodiment of the phase-locked loop comprises an oscillator, a counter, a comparator, and a delay arrangement. The counter comprises a first input connected to the oscillator, a second input connected to a reference frequency terminal, and an output. An input of the comparator is connected to the output of the counter and an output of the comparator to the oscillator. The delay arrangement is connected between the oscillator and the first input of the counter or between the reference frequency terminal and the second input of the counter. The delay arrangement delays an input signal sent to an input of the delay arrangement, as a function of a sequence signal and makes a delayed signal available at an output of the delay arrangement.
    • 公开了一种适用于移动无线电通信的锁相环路及其操作方法。 锁相环的一个实施例包括振荡器,计数器,比较器和延迟装置。 计数器包括连接到振荡器的第一输入端,连接到参考频率端子的第二输入端和输出端。 比较器的输入端连接到计数器的输出端和比较器的输出端连接到振荡器。 延迟装置连接在振荡器和计数器的第一输入端之间或连接在基准频率端子和计数器的第二输入端之间。 延迟装置将发送到延迟装置的输入的输入信号作为序列信号的函数进行延迟,并使延迟信号在延迟装置的输出处可用。