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61. 发明申请

US20080055139A1 DIGITAL MODULATION CIRCUIT 有权
标题翻译：数字调制电路
公开(公告)号：US20080055139A1
公开(公告)日：2008-03-06
申请号：US11847761
申请日：2007-08-30
申请人： Man Suk Seo , Hyung Cheol Park , Seong Soo Lee , Sang Yub Lee , Chang Soo Yang , Wan Cheol Yang
发明人： Man Suk Seo , Hyung Cheol Park , Seong Soo Lee , Sang Yub Lee , Chang Soo Yang , Wan Cheol Yang
IPC分类号： H03M1/66
CPC分类号： H03C3/02 , H03C1/02 , H03K7/04 , H03K2005/00247 , H04B1/71635
摘要： Provided is a digital modulation circuit constructed with only a digital circuit. The digital modulation circuit includes: a clock generator which generates a reference clock pulse having a predetermined period; an up/down counter which generates a count value having predetermined bits by up-counting or down-counting the reference clock pulse and outputs a bit in the count value as a transmission signal; a controller which determines a counting start/end time point of the up/down counter and determine which one of the up-counting operation and the down-counting operation of the up/down counter is to be performed, according to a value of digital transmission data that is to be transmitted; and a band-pass filter which converts a waveform of the transmission signal output from the up/down counter into a sine waveform.
摘要翻译：提供了仅由数字电路构成的数字调制电路。数字调制电路包括：时钟发生器，其产生具有预定周期的参考时钟脉冲; 向上/向下计数器，其通过对参考时钟脉冲进行向上计数或递减计数来产生具有预定位的计数值，并将计数值中的位作为发送信号输出; 确定上/下计数器的计数开始/结束时间点的控制器，并根据数字的数值确定要执行向上/向下计数器的向上计数操作和向下计数操作中的哪一个要发送的发送数据; 以及将从上/下计数器输出的发送信号的波形转换为正弦波形的带通滤波器。

62. 发明授权

US07142382B2 Phase adjustment circuit and demodulation circuit 有权
标题翻译：相位调整电路和解调电路
公开(公告)号：US07142382B2
公开(公告)日：2006-11-28
申请号：US10944917
申请日：2004-09-21
申请人： Kouichi Nagano
发明人： Kouichi Nagano
IPC分类号： G11B5/09 , G11B27/10
CPC分类号： H03C3/02 , G11B7/0053
摘要： A phase adjustment circuit includes: a carrier-wave-delay adjusting circuit for delaying an input carrier wave and outputting the delayed carrier wave, in accordance with phase information; and a phase-difference detecting/adjusting circuit for detecting a phase difference between an input signal and the delayed carrier wave, outputting, as the phase information, a value according to the detected phase difference, adjusting the delayed carrier wave such that the delayed carrier wave has a phase substantially coincident with a phase of the input signal, and outputting the resultant carrier wave as a phase-adjusted carrier wave. In a steady state, the phase-difference detecting/adjusting circuit outputs, as the phase information, a value indicating the presence of a phase difference.
摘要翻译：相位调整电路包括：载波延迟调整电路，用于根据相位信息延迟输入载波并输出延迟的载波; 以及相位差检测/调整电路，用于检测输入信号和延迟的载波之间的相位差，输出根据检测的相位差的值作为相位信息，调整延迟的载波，使得延迟的载波波具有与输入信号的相位基本一致的相位，并将所得到的载波作为相位调整载波输出。在稳定状态下，相位差检测/调整电路输出表示存在相位差的值作为相位信息。

63. 发明授权

US06501337B1 Method and apparatus for correcting the effect of dielectric absorption in an open-loop modulator circuit 失效
标题翻译：用于校正开环调制器电路中的介电吸收效应的方法和装置
公开(公告)号：US06501337B1
公开(公告)日：2002-12-31
申请号：US09815664
申请日：2001-03-23
申请人： Mark E. Tucker
发明人： Mark E. Tucker
IPC分类号： H03L700
CPC分类号： H03C3/02 , H03L7/093 , H03L7/187
摘要： A method and apparatus for reducing the effects of dielectric absorption to a loop filter capacitor utilized in a dual-mode open-loop modulator having a transmit and receive communication frequency. The modulator incorporating a phase lock loop having means for maintaining a substantially constant voltage across the loop filter capacitor irrespective of the communication frequency implemented.
摘要翻译：一种减少介质吸收对具有发射和接收通信频率的双模式开环调制器中使用的环路滤波电容器的影响的方法和装置。包含锁相环的调制器具有用于在环路滤波电容器两端保持基本上恒定的电压的装置，而与所实施的通信频率无关。

64. 发明授权

US5608761A Method, device, and radio for compensating for modulator frequency drift while allowing for data transmission 失效
标题翻译：用于补偿调制器频率漂移同时允许数据传输的方法，设备和无线电
公开(公告)号：US5608761A
公开(公告)日：1997-03-04
申请号：US352996
申请日：1994-12-09
申请人： George F. Opas , Robert J. DeGroot
发明人： George F. Opas , Robert J. DeGroot
IPC分类号： H03C3/02 , H04B1/04 , H04L5/16 , H04L27/12 , H04K1/02 , H04L25/03 , H04L25/49
CPC分类号： H03C3/02 , H04L27/12 , H04L5/16 , H04B1/04
摘要： A method (100), a device (300), and a radio (500) are described for compensating for modulator frequency drift while allowing for data transmission in a half-duplex frequency modulated communication system. An adjustment is made to a premodulation signal in such a way that when it is passed through a frequency modulator to provide a transmitter excitation signal, frequency drift is corrected. Subsequent to determining a training command, the transmitter excitation signal passes through a switch to a demodulator. The demodulator output is averaged and used in the adjustment.
摘要翻译：描述了一种方法（100），设备（300）和无线电（500），用于补偿调制器频率漂移，同时允许半双工调频通信系统中的数据传输。以预处理信号进行调整，使得当其通过频率调制器以提供发射器激励信号时，校正频率漂移。在确定训练命令之后，发射机激励信号通过开关到解调器。解调器输出被平均化并用于调整。

65. 发明授权

US5289502A Signal processing device 失效
标题翻译：信号处理装置
公开(公告)号：US5289502A
公开(公告)日：1994-02-22
申请号：US785278
申请日：1991-10-30
申请人： Somei Kawasaki
发明人： Somei Kawasaki
IPC分类号： G11B20/06 , G11B20/10 , H03C3/02 , H03C3/08 , H03K3/011 , H03K3/017 , H03K3/0231 , H03K3/282 , H03K7/06 , H03C3/00 , H04L27/12
CPC分类号： H03K7/06 , G11B20/06 , G11B20/10 , H03C3/02 , H03C3/08 , H03K3/011 , H03K3/017 , H03K3/0231 , H03K3/2821
摘要： A signal processing device for processing an information signal, comprises a frequency modulator arranged to receive the information signal, to frequency-modulate the received information signal and to output a frequency-modulated information signal, a feedback signal generator arranged to receive the frequency-modulated information signal output from the frequency modulator means and to generate a feedback signal therefrom at a phase which is variable to be either in-phase or out-of-phase relative to the received frequency-modulated information signal in accordance with a duty in a high-level period of the received frequency-modulated information signal and at an amplitude which is variable within a range from a zero level to the same level as the received frequency-modulated information signal, and addition circuitry arranged to add the feedback signal output from the feedback signal generator to the information signal received by the frequency modulator.
摘要翻译：一种用于处理信息信号的信号处理装置，包括频率调制器，被配置为接收信息信号，对所接收的信息信号进行频率调制并输出调频信息信号，反馈信号发生器被布置成接收频率调制信号从频率调制器装置输出的信号信号并且以相对于接收的调频信息信号可变为同相或异相的相位产生反馈信号，该相位根据高电平的占空比接收的调频信息信号的低频周期，以及在从零电平到与所接收的调频信息信号的相同电平的范围内可变的幅度，以及相加电路，被配置为将从反馈信号发生器由信号信号接收的频率调制器。

66. 发明授权

US5075644A Voltage controlled oscillator with filtered and compensated modulation 失效
标题翻译：具有滤波和补偿调制的压控振荡器
公开(公告)号：US5075644A
公开(公告)日：1991-12-24
申请号：US620817
申请日：1990-12-03
申请人： Clarke J. Calvin
发明人： Clarke J. Calvin
IPC分类号： H03B5/12 , H03C3/02 , H03C3/22
CPC分类号： H03C3/225 , H03B5/1203 , H03B5/1228 , H03B5/1243 , H03C3/02 , H03B2200/004 , H03B2200/0062 , H03C2200/005
摘要： Briefly, according to the invention, a voltage controlled oscillator 200 having a control input, an information signal input, and an output is disclosed. The voltage controlled oscillator 200 comprises a tank circuit 202 for generating a carrier signal and a modulator 206 for modulating the carrier signal in response to the information signal 210 at the information signal input of the voltage controlled oscillator 200. The voltage controlled oscillator 200 includes a filter 208 coupling the modulator 206 to the tank circuit 202 for rejecting out of band signals from altering the bias point of the modulator 206.
摘要翻译：简而言之，根据本发明，公开了具有控制输入，信息信号输入和输出的压控振荡器200。压控振荡器200包括用于产生载波信号的振荡电路202和用于响应于在压控振荡器200的信息信号输入端处的信息信号210来调制载波信号的调制器206.压控振荡器200包括滤波器208将调制器206耦合到音箱电路202，用于拒绝带外信号改变调制器206的偏置点。

67. 发明授权

US5038120A Frequency modulated phase locked loop with fractional divider and jitter compensation 失效
$Frequency modulated phase locked loop with fractional divider and jitter compensation$
标题翻译：频率调制锁相环，具有分数分频和抖动补偿
公开(公告)号：US5038120A
公开(公告)日：1991-08-06
申请号：US486781
申请日：1990-03-01
申请人： Mark A. Wheatley , Leslie A. Lepper , Nigel K. Webb
发明人： Mark A. Wheatley , Leslie A. Lepper , Nigel K. Webb
IPC分类号： H03C3/02 , H03C3/09 , H03L7/197
CPC分类号： H03C3/0991 , H03C3/0925 , H03C3/0933 , H03C3/0941 , H03C3/0958 , H03C3/0975 , H03L7/1976 , H03C3/02
摘要： A fractional-N type frequency synthesizer has a voltage controlled oscillator controlled in a phase-locked loop by a divide by N divider and a phase comparator responsive to the divided frequency and to a reference frequency Fr. An accumulator is responsive to the desired fractional part of the N and is clocked by Fr to produce carry signals for producing the required periodic variations in N. A second accumulator produces periodic equal and opposite further variations in N to reduce the magnitude of the error waveform which would be given to the phase-detector output by the variations in n caused by the first accumulator. A digital to analog converter and a differentiating circuit produce a jitter correction signal for reducing residual jitter. A coherent detector detects for the presence of any residual jitter at the control input of the VCO and resulting from the fractional-N control circuit. Any such residual jitter produces a control signal which adjusts the value of the jitter correction signal accordingly. Two-port frequency modulation is produced by an in-band circuit incorporating an integrator and a full band circuit. With no FM input, a counter detects any divergence in output frequency from the desired value and caused by spurious input at the integrator. A resultant control signal offsets any such spurious inputs. The coherent detector detects at the control input of the VCO any component which is coherent with the in band modulation signal and adjusts the full band modulation signal to eliminate this, so that correct FM is produced.
摘要翻译：分数N型频率合成器具有通过除以N除法器和相位比较器在锁相环中控制的压控振荡器，该相位比较器响应于分频和参考频率Fr。累加器响应于期望的N分数部分并由Fr计时，以产生用于产生N中所需的周期性变化的进位信号。第二个累加器在N中产生周期性相等和相反的其他变化，以减小误差波形的幅度这将由由第一累加器引起的n的变化给予相位检测器输出。数模转换器和微分电路产生抖动校正信号，以减少残余抖动。相干检测器检测在VCO的控制输入处是否存在任何残留抖动，并由分数N控制电路产生。任何这样的残余抖动产生相应地调整抖动校正信号的值的控制信号。双端口频率调制由并入有积分器和全频带电路的带内电路产生。在没有FM输入的情况下，计数器会从所需值检测输出频率的任何偏差，并由积分器的寄生输入引起。所得到的控制信号抵消任何这样的虚假输入。相干检测器在VCO的控制输入处检测与带内调制信号相干的任何分量，并调整全频带调制信号以消除该频带调制信号，从而产生正确的FM。

68. 发明授权

US4747159A RF modulator 失效
标题翻译： RF调制器
公开(公告)号：US4747159A
公开(公告)日：1988-05-24
申请号：US887906
申请日：1986-07-18
申请人： Masashi Kato
发明人： Masashi Kato
IPC分类号： H03C3/02 , H03C5/00 , H03G3/20 , H04N5/40 , H04N5/775 , H01Q11/02
CPC分类号： H03G3/3042 , H03C3/02 , H03C5/00 , H04N5/40 , H04N5/7755
摘要： An RF modulator is characterized by a gain adjusting circuit for gain adjustment incorporated with an RF amplifier for amplifying a carrier wave provided from a carrier oscillator and applying the same to a video signal modulator and to an audio signal mixer so that the gain of the RF amplifier is adjustable so as to adjust a difference in level of the carrier wave provided differently depending upon a resonance element being connected to the carrier oscillator.
摘要翻译： RF调制器的特征在于用于增益调整的增益调整电路，其包括用于放大从载波振荡器提供的载波的RF放大器并将其应用于视频信号调制器和音频信号混合器，使得RF的增益放大器是可调节的，以便根据连接到载波振荡器的谐振元件不同地调节提供的载波电平差。

69. 发明授权

US4531155A Circuit for independently adjusting frequency deviation of a VCO 失效
标题翻译：独立调节VCO频偏的电路
公开(公告)号：US4531155A
公开(公告)日：1985-07-23
申请号：US436369
申请日：1982-10-25
申请人： Kenichi Hasegawa
发明人： Kenichi Hasegawa
IPC分类号： H03C3/06 , G11B20/06 , H03C3/02 , H04N5/40 , H04N5/922 , H04N1/32 , H04B1/04
CPC分类号： H03C3/02 , H04N5/40
摘要： A circuit for controlling the application of a signal source to a variable frequency oscillator is disclosed in which the width of frequency deviation and the lower limit frequency of the modulated signal can be set independently of each other. The emitter of a first transistor is connected to a first voltage source through a first resistor. Its base is connected to a signal source through a capacitor, and also to a second voltage source through a switch circuit. The base of a second transistor is connected to the second voltage source and its emitter is connected to the first voltage source through a variable resistor. The emitters of the first and second transistors are connected with each other by a third resistor. The collector current of the second transistor is supplied to a variable frequency oscillator.
摘要翻译：公开了一种用于控制向可变频率振荡器施加信号源的电路，其中可以彼此独立地设置调制信号的频率偏差和下限频率的宽度。第一晶体管的发射极通过第一电阻器连接到第一电压源。其基极通过电容器连接到信号源，并且还通过开关电路连接到第二电压源。第二晶体管的基极连接到第二电压源，其发射极通过可变电阻器连接到第一电压源。第一和第二晶体管的发射极通过第三电阻器相互连接。第二晶体管的集电极电流被提供给可变频率振荡器。

70. 发明授权

US4476498A Deviation detector for FM video recording system 失效
标题翻译： FM录像系统偏差探测器
公开(公告)号：US4476498A
公开(公告)日：1984-10-09
申请号：US346370
申请日：1982-02-05
申请人： David A. Sheean
发明人： David A. Sheean
IPC分类号： G01R23/00 , H03C3/02 , H03C3/06 , G11B27/36 , H04N5/76
CPC分类号： H03C3/02 , G01R23/00
摘要： The deviation of an FM signal modulated by a video signal is detected by measuring the average period of the FM signal at a measurement rate proportional to the average frequency of the FM signal. The value of each average period measurement is compared with a predetermined number to produce an indicator signal each time the measured value is less than or equal to the predetermined number. The effect of overshoot of the video signal due to preemphasis is minimized by detecting the successive occurrence of at least two indicator signals to provide a further indicator signal which may be used for visually monitoring video peak levels and/or for protecting a utilization device to which the FM signal is supplied.
摘要翻译：通过以与FM信号的平均频率成比例的测量速率测量FM信号的平均周期来检测由视频信号调制的FM信号的偏差。将每个平均周期测量的值与预定数量进行比较，以在每次测量值小于或等于预定数量时产生指示符信号。通过检测至少两个指示符信号的连续出现来提供视频监视视频峰值电平和/或用于保护使用设备到达哪个提供FM信号。

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