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81. 发明授权

US6002298A Reconstituted frequency modulation with feedforward demodulator 失效
标题翻译：用前馈解调器重构频率调制
公开(公告)号：US6002298A
公开(公告)日：1999-12-14
申请号：US96412
申请日：1998-06-11
申请人： Andrew J. Noga
发明人： Andrew J. Noga
IPC分类号： H03C3/06 , H03D3/00
CPC分类号： H03C3/06
摘要： Apparatus and method for estimating the angle-modulation imposed on a transmitted Radio Frequency (RF) or Intermediate Frequency (IF) carrier. The method estimates angle-modulation when communications channels add distortions such as noise to transmitted signals. The system provides reconstituted frequency modulation from a feedforward demodulator. The goal is to reduce the modulation index of a desired signal and to employ a narrower band-pass filter that passes this signal while rejecting the distortion that accompanies it. A plurality of stages, 1 through M, exist within the system. Stages 2 through M contain the same components, although filter coefficients and alignment delays may differ from stage to stage. Stage 1 of the demodulator differs slightly from the remaining stages, since the only input required by Stage 1 is a complex envelope signal that contains both the desired signal and the distortion added by the channel. The output of any particular stage of the demodulator consists of complex envelope signals and a real FM estimate. Each output from a stage p serves as input to stage p+1, for 2.ltoreq.p+1
摘要翻译：用于估计对发射的射频（RF）或中频（IF）载波施加的角度调制的装置和方法。当通信信道向发射信号增加诸如噪声的失真时，该方法估计角度调制。该系统从前馈解调器提供重构的频率调制。目的是减少所需信号的调制指数，并采用较窄的带通滤波器，通过该信号同时拒绝伴随其的失真。系统内存在多个阶段1至M。阶段2至M包含相同的组件，尽管过滤器系数和对准延迟可能在不同阶段之间不同。解调器的第1级与其余级略有不同，因为第1级所需的唯一输入是包含期望信号和通道所添加的失真的复包络信号。解调器的任何特定级的输出由复包络信号和真实的FM估计组成。对于2
1

82. 发明授权

US5506546A Method and apparatus for generating transmitting wave 失效
标题翻译：用于产生发射波的方法和装置
公开(公告)号：US5506546A
公开(公告)日：1996-04-09
申请号：US490707
申请日：1995-06-15
申请人： Satoshi Kowaguchi
发明人： Satoshi Kowaguchi
IPC分类号： H03C3/06 , H03C3/08 , H03F1/34 , H03G3/00 , H04L27/20 , H03C1/06 , H03C3/00 , H03C5/00 , H04L27/00
CPC分类号： H04L27/2071 , H03F1/34 , H03G3/007 , H03C3/06 , H03C3/08
摘要： In a method for generating a transmitting wave, a power supply voltage to be supplied to a transmission power amplifier is detected by a voltage detector, and a modulating signal is controlled so that a peak value of a modulated wave is lowered in accordance with a reduction amount of the power supply voltage. Since the peak value of the modulated wave input to the power amplifier is lowered, it is possible to obtain a transmitting wave without a distortion of the wave form or an increased bandwidth even when the reduction in the power supply voltage involves the lowering of the driving capability of the power amplifier.
摘要翻译：在产生发送波的方法中，通过电压检测器检测向发送功率放大器供给的电源电压，控制调制信号，使得调制波的峰值根据减少而降低电源电压量。由于输入到功率放大器的调制波的峰值降低，即使当电源电压的降低涉及驱动的降低时，也可以获得没有波形失真或带宽增加的发送波功率放大器的能力。

83. 发明授权

US4581749A Data frequency modulator with deviation control 失效
标题翻译：数据频率调制器带偏差控制
公开(公告)号：US4581749A
公开(公告)日：1986-04-08
申请号：US627158
申请日：1984-07-02
申请人： Scott N. Carney , Steven H. Goode , Donald L. Linder
发明人： Scott N. Carney , Steven H. Goode , Donald L. Linder
IPC分类号： H04L27/12 , H03C3/06 , H03C3/08 , H03C3/09 , H04L27/20
CPC分类号： H03C3/0983 , H03C3/0941 , H03C3/0966 , H04L27/2017 , H03C2200/005
摘要： An automatic deviation control circuit for an angle modulated data transmitter is disclosed wherein the deviation level of modulated data is controlled by a modulation cancelling deviation error detection feedback loop. After the modulation is cancelled from a sample of modulated carrier by a predetermined value of deviation, residual modulation is detected, sampled following a predetermined number of like-level data bits, and applied to the modulation path gain to increase or decrease the deviation such that the residual modulation is minimized.
摘要翻译：公开了一种用于角度调制数据发射机的自动偏差控制电路，其中调制数据的偏移电平由调制消除偏差误差检测反馈回路控制。在从调制载波的采样中取消了预定的偏差值的调制之后，检测到残留调制，按照预定数量的同级数据比特进行采样，并将其应用于调制路径增益以增加或减少偏差，使得残余调制被最小化。

84. 发明授权

US4447792A Synthesizer circuit 失效
标题翻译：合成电路
公开(公告)号：US4447792A
公开(公告)日：1984-05-08
申请号：US319139
申请日：1981-11-09
申请人： Stephen R. Wynn
发明人： Stephen R. Wynn
IPC分类号： H03C3/09 , H03C3/06
CPC分类号： H03C3/0966 , H03C3/0941 , H03C3/0958
摘要： A frequency synthesizer utilizing a phased locked loop is provided with input modulating signals for the reference oscillator and for the voltage controlled oscillator. Where the frequency of the reference oscillator must be divided, a time delay circuit between the input modulating signal and the voltage controlled oscillator is provided in order to eliminate or appreciably reduce deviation magnitude responsive distortion with respect to input modulating frequencies.
摘要翻译：利用锁相环的频率合成器具有用于参考振荡器和压控振荡器的输入调制信号。在必须分频参考振荡器的频率的情况下，提供输入调制信号和压控振荡器之间的时间延迟电路，以便消除或明显地减少相对于输入调制频率的偏差幅度响应失真。

85. 发明授权

US4387470A Receiver input stage with an improvement of the signal to noise ratio 失效
标题翻译：接收机输入级具有提高的信噪比
公开(公告)号：US4387470A
公开(公告)日：1983-06-07
申请号：US104022
申请日：1979-12-17
申请人： Robert Maurer , Hans P. Petry
发明人： Robert Maurer , Hans P. Petry
IPC分类号： H03F7/00 , H03D3/00 , H03F7/04 , H03G3/30 , H04B1/16 , H04B1/18 , H04B1/26 , H03C3/06
CPC分类号： H03D3/004 , H03F7/04 , H03G3/3094 , H04B1/26
摘要： A receiver input circuit composed of an upper sideband parametric down converter for converting a high frequency input signal into an intermediate frequency; a signal demodulator having a signal input connected to the output of the converter; a controllable oscillator connected in a control loop with the converter and the demodulator for supplying the converter with a pump signal which follows the intermediate signal in frequency and phase and which has a frequency equal to twice the intermediate frequency such that the sum of the pump signal frequency and the intermediate frequency equals three times the intermediate frequency; and a real resistance terminating the converter at the image frequency corresponding to the established pump signal and intermediate frequencies, whereby the circuit has an available power gain greater than unity and an improved signal to noise ratio ahead of the demodulator.
摘要翻译：一种由上边带参数降档转换器组成的接收机输入电路，用于将高频输入信号转换为中频; 信号解调器，其具有连接到转换器的输出的信号输入; 连接在与转换器和控制回路中的可控振荡器和解调器，用于向转换器提供在频率和相位上遵循中间信号的泵浦信号，其频率等于中频的两倍，使得泵浦信号的和频率和中频等于中频的三倍; 以及在与所建立的泵浦信号和中间频率相对应的图像频率处终止转换器的实际电阻，由此该电路具有大于单位的可用功率增益和在解调器之前提高的信噪比。

86. 发明授权

US4286237A Wide range drift compensated FM signal generator 失效
标题翻译：宽范围漂移补偿FM信号发生器
公开(公告)号：US4286237A
公开(公告)日：1981-08-25
申请号：US85869
申请日：1979-10-18
申请人： Jack E. James
发明人： Jack E. James
IPC分类号： H03C3/09 , H03C3/06
CPC分类号： H03C3/09
摘要： The output frequency of a variable frequency oscillator is compared with that of a reference frequency source by means of a phase detector and the resultant error signal is integrated and applied as a negative feedback signal to the input of the oscillator whereby drift of the oscillator output frequency is minimized. Deviation, modulation index, dynamic stability and linearity are enhanced by means of a pulse generator that is synchronized with a modulating input signal supplied to the oscillator for supplying a keying signal to the phase detector during a portion of each cycle of the modulating input signal.
摘要翻译：通过相位检测器将可变频率振荡器的输出频率与参考频率源的输出频率进行比较，得到的误差信号被积分并作为负反馈信号施加到振荡器的输入端，从而振荡器输出频率的漂移被最小化。通过脉冲发生器增强偏差，调制指数，动态稳定性和线性度，脉冲发生器与调制输入信号同步，该调制输入信号提供给振荡器，用于在调制输入信号的每个周期的一部分期间向相位检测器提供键控信号。

87. 发明授权

US4052672A Extended phase-range, high fidelity modulator arrangement 失效
标题翻译：扩展相位范围，高度调制器布置
公开(公告)号：US4052672A
公开(公告)日：1977-10-04
申请号：US707747
申请日：1976-07-22
申请人： Ralph Thomas Enderby , Francis Robert Steel , Alan Michael Victor
发明人： Ralph Thomas Enderby , Francis Robert Steel , Alan Michael Victor
IPC分类号： H03C3/09 , H03C3/06
CPC分类号： H03C3/0975 , H03C3/0941 , H03C3/095
摘要： An improved wideband phase modulator suitable as a simple modulation interface for existing phase modulated transmitters. The disclosed modulator arrangement utilizes a high stability reference oscillator and an associated phase locked loop for optimum long term stability. Means are included for extended phase range and high fidelity of modulation irrespective of loop bandwidth. Both tone and digital modulation is accommodated.

88. 发明授权

US4027274A Phase locked loop circuit 失效
标题翻译：锁相环电路
公开(公告)号：US4027274A
公开(公告)日：1977-05-31
申请号：US589546
申请日：1975-06-23
申请人： Kiyotake Fukui , Hiroshi Matsushima , Yukinobu Ishigaki
发明人： Kiyotake Fukui , Hiroshi Matsushima , Yukinobu Ishigaki
IPC分类号： H03L7/10 , H03L7/14 , H03C3/06
CPC分类号： H03L7/10 , H03L7/148 , Y10S331/02
摘要： A phase locked loop circuit comprises a phase comparator having an operation range with specific limits for phase comparing. A voltage-controlled oscillator produces an output at the output of the phase locked loop. At the same time, the oscillator output is fed to the phase comparator. A detector circuit, supplied with the output of the phase comparator, detects any exceeding of a specific limit of the phase by comparing the operation range of the phase comparator with a phase deviation of the oscillator output signal fed to the phase comparator. The detector produces an output correction voltage. An adder circuit adds this output correction voltage and an output error voltage of the phase comparator and supplies the resulting added voltage, as a control voltage, to the voltage-controlled oscillator. This phase locked loop operates in a state wherein the lock range thereof has been equivalently expanded by the correction voltage.
摘要翻译：锁相环电路包括具有用于相位比较的特定限制的操作范围的相位比较器。压控振荡器在锁相环的输出端产生一个输出。同时，振荡器输出被馈送到相位比较器。提供有相位比较器的输出的检测器电路通过将相位比较器的操作范围与馈送到相位比较器的振荡器输出信号的相位偏差进行比较来检测超过相位的特定极限。检测器产生输出校正电压。加法器电路将该输出校正电压和相位比较器的输出误差电压相加，并将所得到的附加电压作为控制电压提供给压控振荡器。该锁相环在其锁定范围已被等效地扩大了校正电压的状态下工作。

89. 发明授权

US4015220A Frequency shift keyed toned generator 失效
标题翻译：变频调频发电机
公开(公告)号：US4015220A
公开(公告)日：1977-03-29
申请号：US628568
申请日：1975-11-03
申请人： Barry M. Kaufman
发明人： Barry M. Kaufman
IPC分类号： H04L27/12 , H03C3/06
CPC分类号： H04L27/122
摘要： A frequency shift keyed (FSK) generator producing an output frequency which is determined by gating through a selected one of a plurality of crystal controlled oscillators. The oscillator output is divided by a digital frequency divider to the operating tone frequency. The square wave output of the divider is filtered to a sinewave by an active tracking bandpass filter which is instantaneously switched to the operating frequency simultaneously with the selection of the appropriate crystal controlled oscillator.
摘要翻译：一种频移键控（FSK）发生器，其产生通过多个晶体控制振荡器中选定的一个门控来确定的输出频率。振荡器输出由数字分频器除以操作音频率。分频器的方波输出通过有源跟踪带通滤波器滤波成正弦波，该滤波器在选择合适的晶体振荡器的同时瞬间切换到工作频率。

90. 发明授权

US3854094A Crystal controlled, frequency modulated transmitter 失效
标题翻译：晶体控制，频率调制发射机
公开(公告)号：US3854094A
公开(公告)日：1974-12-10
申请号：US30281172
申请日：1972-11-01
申请人： REGENCY ELECTRONICS
发明人： TOWLER J
IPC分类号： H03C3/06
CPC分类号： H03C3/06
摘要： A frequency modulated transmitter for use at frequencies from 25 to 54 MHz is disclosed. The crystals in the transmitter oscillate at their fundamental frequency, and this frequency is divided by four to produce a lower frequency which is then modulated. This lower modulated carrier frequency is then multiplied by 24 to produce an output frequency in the desired range.
摘要翻译：公开了一种频率为25至54 MHz的频率调制发射机。发射机中的晶体以其基频振荡，该频率除以四，产生较低频率，然后调制。然后将该较低调制载波频率乘以24以产生期望范围内的输出频率。

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