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公开(公告)号：US09501087B1
公开(公告)日：2016-11-22
申请号：US14742369
申请日：2015-06-17
Applicant: RAYTHEON COMPANY
Inventor： Matthew J. Koeth , Michael R. Patrizi
CPC classification number: G06F1/0321 , G06F1/022 , G06F1/0328
Abstract: A frequency-agile frequency source. The frequency source includes an oscillator having an output and being configured to generate a signal at a first frequency at the output, a first direct digital synthesizer (DDS) having an output and a sampling clock input connected to the output of the oscillator, a filter amplifier block having an input directly connected to the output of the first DDS and an output, and a second DDS having a sampling clock input directly connected to the output of the filter amplifier block. The filter amplifier block is a substantially linear time-invariant element having a frequency response, the magnitude of the frequency response being at least 12 dB lower, at a second frequency within the first Nyquist zone of the first frequency, than at a third frequency above the first Nyquist zone of the first frequency.
Abstract translation: 频率敏捷频率源。 频率源包括具有输出并被配置为在输出处以第一频率产生信号的振荡器，具有连接到振荡器的输出的输出和采样时钟输入的第一直接数字合成器（DDS），滤波器 具有直接连接到第一DDS的输出的输入和输出的放大器块，以及具有直接连接到滤波器放大器块的输出的采样时钟输入的第二DDS。 滤波器放大器块是具有频率响应的基本上线性的时间不变元件，频率响应的幅度在第一频率的第一奈奎斯特区内的第二频率处比在第三频率以上的第三频率处低至少12dB 第一个奈奎斯特区的第一个频率。
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公开(公告)号：US09825639B2
公开(公告)日：2017-11-21
申请号：US15058438
申请日：2016-03-02
Applicant: Raytheon Company
Inventor： Michael R. Patrizi , Nathan R. Francis , Matthew J. Koeth
CPC classification number: H03L7/1075 , G01H1/00 , G01P15/00 , H03L1/00 , H03L7/00 , H03L7/093 , H03L7/099
Abstract: The present disclosure is directed towards systems and method for actively tuning a phase locked loop based on vibration excitation levels experienced by the phase locked loop. A bandwidth of the phase locked loop can be actively increased or decreased based upon a detected vibration level. In an embodiment, the phase locked loop includes a controllable oscillator, an output module, a filter module and a detector. The filter module can be configured to receive a bandwidth control signal to modify a bandwidth of the phase locked loop based on a vibration signal. In an embodiment, the vibration signal corresponds to a vibration level experienced by the phased locked loop. The detector can be configured to receive a PLL output signal from the output module and to receive a PLL input signal.
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公开(公告)号：US20170257105A1
公开(公告)日：2017-09-07
申请号：US15058438
申请日：2016-03-02
Applicant: Raytheon Company
Inventor： Michael R. Patrizi , Nathan R. Francis , Matthew J. Koeth
CPC classification number: H03L7/1075 , G01H1/00 , G01P15/00 , H03L1/00 , H03L7/00 , H03L7/093 , H03L7/099
Abstract: The present disclosure is directed towards systems and method for actively tuning a phase locked loop based on vibration excitation levels experienced by the phase locked loop. A bandwidth of the phase locked loop can be actively increased or decreased based upon a detected vibration level. In an embodiment, the phase locked loop includes a controllable oscillator, an output module, a filter module and a detector. The filter module can be configured to receive a bandwidth control signal to modify a bandwidth of the phase locked loop based on a vibration signal. In an embodiment, the vibration signal corresponds to a vibration level experienced by the phased locked loop. The detector can be configured to receive a PLL output signal from the output module and to receive a PLL input signal.
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