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公开(公告)号：US5032800A
公开(公告)日：1991-07-16
申请号：US538439
申请日：1990-06-15
CPC分类号： H03B9/142 , H03B5/1882 , H03B2009/126 , H03B2200/0088 , H03B2200/009 , H03B2201/0241 , H03B2201/033 , H03B2202/076 , H03B5/1841
摘要： An oscillator providing predictable oscillator modulation sensitivity includes an amplifier and a feedback circuit disposed about the amplifier. The feedback circuit includes a resonator having a first port and a second port and a voltage-controlled phase shifter having an input port, an output port and a control port, the input port of the voltage-controlled phase shifter connected to the output port of the amplifier and the output port of the voltage-controlled phase shifter coupled to a port of the resonator. The oscillator further includes a circuit, responsive to signals from the output of the voltage-controlled phase shifter and the first port of the resonator, to provide a control signal to the control port of the voltage-controlled phase shifter for degenerating low frequency FM noise arising within the amplifier.
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公开(公告)号：US5019792A
公开(公告)日：1991-05-28
申请号：US425144
申请日：1989-10-23
摘要： A tunable bandpass filter for radio frequency energy with a phase-locked loop for tracking an input signal and to control the filter to keep the center frequency of the passband coincident with the frequency of the input signal is shown. Using a Yttrium Iron Garnet (YIG) filter as a frequency determining element and as a passive dispersive reference element for a frequency discriminator, the bandpass filter uses the output signal of the discriminator to form a fine tuning signal to control the center frequency of the passband of the YIG filter.
摘要翻译： 示出了用于射频能量的可调谐带通滤波器，其具有用于跟踪输入信号的锁相环并且控制滤波器以保持通带的中心频率与输入信号的频率一致。 使用钇铁石榴石（YIG）滤波器作为频率确定元件，并作为用于鉴频器的无源色散参考元件，带通滤波器使用鉴频器的输出信号形成微调信号，以控制通带的中心频率 的YIG滤波器。
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3.发明授权
公开(公告)号：US4510463A
公开(公告)日：1985-04-09
申请号：US487778
申请日：1983-04-22
CPC分类号： H03D3/22 , H03L7/02 , H03D2200/0031 , H03D2200/0082
摘要： A frequency discriminator having a wide capture band is shown to comprise, in addition to a conventional phase detector having two channels fed by a signal whose frequency is to be determined (the first one of the channels containing a tuned circuit operative to shift the phase of the signal in accordance with the difference between the frequency of the signal and the center frequency of the tuned circuit and the second one of the channels containing a phase shifter operative to shift the phase of the signal by 90.degree. regardless of the frequency of the signal), a compensating circuit operative substantially to equalize the amplitudes of the signals applied to the phase detector, the compensating circuit including an amplifier in the first one of the channels to amplify the signal out of the tuned circuit, the gain of the amplifier being controlled by a signal indicative of the difference between the amplitudes of the signals fed to the phase detector.
摘要翻译： 具有宽捕获带的鉴频器除了具有由要被确定频率的信号馈送的两个信道的常规相位检测器之外还包括（第一个信道包含调谐电路，该调谐电路可操作以使 根据信号的频率和调谐电路的中心频率之间的差异以及包含移相器的通道的第二个信号的信号可操作以将信号的相位偏移90°，而不管信号的频率如何 ），补偿电路基本上用于均衡施加到相位检测器的信号的幅度，补偿电路包括在第一通道中的放大器以放大调谐电路中的信号，放大器的增益被控制 通过表示馈送到相位检测器的信号的幅度之间的差异的信号。
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公开(公告)号：US4912432A
公开(公告)日：1990-03-27
申请号：US339534
申请日：1989-04-17
CPC分类号： H03L7/23
摘要： A multiple feedback loop frequency synthesizer, having a first and a second feedback loop, each fed by one of a pair of reference frequency signals having a frequency separation equal to the desired frequency separation of the output signals provided by the synthesizer. The frequency of each of such reference frequency signals is greater than the desired frequency separation of the output signals provided by the synthesizer. With such arrangement, because the bandwidth of each of the feedback loops must be less than the frequency of the reference frequency signal fed to such loop, achievement of frequency separation less than the frequency of either one of the reference frequencies enables each of the feedback loops to have increased bandwidth and hence reduced frequency switching times and increased noise suppression.
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公开(公告)号：US4758800A
公开(公告)日：1988-07-19
申请号：US33306
申请日：1987-04-02
申请人： Robert DiBiase , Zvi Galani , Raymond C. Waterman, Jr. , Ernst F. R. A. Schloemann , Ronald E. Blight
发明人： Robert DiBiase , Zvi Galani , Raymond C. Waterman, Jr. , Ernst F. R. A. Schloemann , Ronald E. Blight
CPC分类号： H01P1/218
摘要： A magnetically tuned resonant circuit having improved noise performance includes a ferrimagnetic or gyromagnetic body such as a YIG sphere which is disposed within r.f. structure, The r.f. structure is disposed between a pair of pole pieces of a biasing magnet and flux return path. Several techniques are described for reducing fluctuations in magnetic fields through the gyromagnetic body. The gyromagnetic body is isolated from conductive surfaces, or the bulk of conductive surfaces in the region adjacent to the magnetic body are reduced. Further, a technique is also described which provides a break in the electrical continuity around the r.f. structure. Each of these technique reduce the magnitude of thermally induced eddy current flow in conductive regions adjacent to the resonant body. It is believed that such eddy current flow produce random magnetic field variations which produce random variations in the frequency characteristics of conventional magnetically tuned resonant circuits.
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公开(公告)号：US4555678A
公开(公告)日：1985-11-26
申请号：US554012
申请日：1983-11-21
CPC分类号： H03B5/1894 , H03B2200/0088 , H03B2202/076
摘要： An improvement in a microwave oscillator using a GaAs FET as the active element is shown to include a phase detector responsive to a portion of the positive feedback signals applied to a resonator having a high Q and to a portion of the signals out of the GaAs FET, shifted by 90.degree., to obtain signals to degenerate noise internally formed in the GaAs FET.
摘要翻译： 使用GaAs FET作为有源元件的微波振荡器的改进被示为包括相位检测器，该相位检测器响应于施加到具有高Q的谐振器的一部分的正反馈信号和来自GaAs FET的信号的一部分 ，偏移90°，以获得GaAs FET内部形成的退化噪声信号。
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公开(公告)号：US4882549A
公开(公告)日：1989-11-21
申请号：US272044
申请日：1988-11-16
申请人： Zvi Galani , Malcolm E. Skinner , John A. Chiesa
发明人： Zvi Galani , Malcolm E. Skinner , John A. Chiesa
摘要： An improved microwave frequency signal source using a single frequency offset technique which increases the frequency range of an indirect frequency synthesizer to twice the highest operating frequency of the programmable digital frequency divider in the loop includes a voltage-controlled oscillator (VCO) operating within a predetermined microwave frequency band and phase-locked to a reference oscillator operating at a reference frequency below microwave frequencies. The offset loop signal is developed by heterodyning the voltage-controlled oscillator (VCO) output signal with a microwave signal whose frequency is located at the center of the predetermined microwave frequency band of the VCO to form a signal at an intermediate frequency (I.F.) within the frequency range of a programmable digital frequency divider.
摘要翻译： 使用单频偏移技术的改进的微波频率信号源将间接频率合成器的频率范围提高到环路中可编程数字分频器的最高工作频率的两倍，包括在预定的频率范围内工作的压控振荡器（VCO） 微波频带，并锁相到以低于微波频率的参考频率工作的参考振荡器。 通过用频率位于VCO的预定微波频带的中心的微波信号来对压控振荡器（VCO）输出信号进行外差来形成偏移环路信号，以形成中频（IF）的信号 可编程数字分频器的频率范围。
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公开(公告)号：US4692714A
公开(公告)日：1987-09-08
申请号：US920403
申请日：1986-10-20
申请人： Zvi Galani
发明人： Zvi Galani
CPC分类号： H03B5/08 , H03B19/00 , H03B2200/0088 , H03B2201/015 , H03B2201/017 , H03B2202/012 , H03B2202/076 , H03B2202/088 , H03B5/18
摘要： A microwave frequency oscillator utilizing a push-push configuration to provide a low noise highly stable output signal at twice the frequency of a single resonator. The single resonator is connected in the feedback loop of two amplifiers. Additional circuit elements insure the proper oscillation conditions and relative phase are maintained. The use of a single resonator makes possible the application of various noise reduction techniques.
摘要翻译： 利用推 - 推配置的微波频率振荡器以单谐振器的两倍的频率提供低噪声高度稳定的输出信号。 单个谐振器连接在两个放大器的反馈环路中。 额外的电路元件确保了适当的振荡条件并保持相对相位。 使用单个谐振器使得可以应用各种降噪技术。
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公开(公告)号：US4616191A
公开(公告)日：1986-10-07
申请号：US511067
申请日：1983-07-05
申请人： Zvi Galani , Richard A. Campbell
发明人： Zvi Galani , Richard A. Campbell
摘要： A frequency-agile source of microwave frequency signals is shown to include: a voltage-controlled oscillator operating within a band of microwave frequencies; a crystal-controlled oscillator operating at a frequency lower than the band of microwave frequencies and producing harmonics within such band; a phase detector having samples of the signals out of the crystal-controlled oscillator and the voltage-controlled oscillator applied as input signals; and a shaping amplifier receiving the output signal of the phase detector to provide a control signal related to the phase difference between the signal out of the voltage-controlled oscillator and the harmonic of the crystal-controlled oscillator nearest to the frequency of the voltage-controlled oscillator.
摘要翻译： 微波频率信号的频率敏捷来源显示为：在微波频带内工作的压控振荡器; 晶体振荡器以低于微波频带的频率工作，并在该频带内产生谐波; 相位检测器，其具有来自晶体振荡器的信号样本和作为输入信号施加的压控振荡器; 以及整形放大器，其接收相位检测器的输出信号，以提供与压控振荡器之间的信号和最接近电压控制振荡器频率的晶体振荡器的谐波之间的相位差相关的控制信号 振荡器
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公开(公告)号：US6005446A
公开(公告)日：1999-12-21
申请号：US942712
申请日：1997-10-01
申请人： Zvi Galani , James T. Hanson
发明人： Zvi Galani , James T. Hanson
IPC分类号： H03B21/02
CPC分类号： H03B21/02
摘要： An apparatus and method for synthesizing low-noise, high stability, multi-frequency microwave signals is disclosed. The output frequencies of a lower frequency, low-noise, synthesizer are upconverted to higher microwave frequencies by mixing these frequencies with the output frequency of an ultra low noise microwave oscillator, determined by a very high Q resonator. Such resonators exhibit large frequency dependence on temperature, but the frequency of an ultra low noise microwave oscillator cannot be stabilized by phase-lock to a stable reference because of its very narrow voltage-controlled frequency tuning range, caused by the very high Q of the resonator. The microwave synthesizer output frequency stabilization is achieved by a novel phase-lock loop which uses the frequency tunability of a low noise SAW oscillator to compensate for the frequency drift of the microwave oscillator. The system does not require the very precise temperature control of a high Q resonator that otherwise would be needed to control the output frequency of a microwave synthesizer.
摘要翻译： 公开了一种用于合成低噪声，高稳定性，多频微波信号的装置和方法。 通过将这些频率与由超高Q谐振器确定的超低噪声微波振荡器的输出频率混合，将低频，低噪声合成器的输出频率上变频到更高的微波频率。 这种谐振器对温度的频率依赖性很大，但是由于非常窄的电压控制频率调谐范围，超低噪声微波振荡器的频率不能通过锁相稳定到稳定的参考值， 谐振器。 微波合成器的输出频率稳定是通过一种新的锁相环实现的，该锁相环使用低噪声SAW振荡器的频率可调性来补偿微波振荡器的频率漂移。 该系统不需要高Q谐振器的非常精确的温度控制，否则将需要它来控制微波合成器的输出频率。
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