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公开(公告)号：US4159527A
公开(公告)日：1979-06-26
申请号：US870647
申请日：1978-01-19
CPC分类号： H04L27/3818 , G06F1/0353 , H04L27/066
摘要： A periodic function wave generator is provided in a digital phase synchronizing circuit which comprises a memory circuit for storing the values of n phases obtained by equally dividing one period of a sine wave by 4n and each having a phase .theta.=90.degree./n(i+0.5), where n represents an integer and i is an integer of from 0 to n-1, a circuit for designating a predetermined one of these phases in one period, a circuit for converting an address read out of the memory circuit into one of the n phases in accordance with one of the ranges of 0.degree. to 90.degree., 90.degree. to 180.degree., 180.degree. to 270.degree. and 270.degree. to 360.degree. and a circuit for inverting the sign of the output of the memory circuit in accordance with the particular range in which the designated phase falls.
摘要翻译： 在数字相位同步电路中提供周期性函数波发生器，其包括存储电路，用于存储通过将正弦波的一个周期等于4n并且每个具有相位θ= 90°/ n（i +0.5），其中n表示整数，i是从0到n-1的整数，用于在一个周期中指定这些相位中的预定的一个的电路，用于将从存储器电路读出的地址转换成一个 根据0°至90°，90°至180°，180°至270°和270°至360°的范围之一的n相，并且用于将存储器电路的输出的符号反转的电路 根据指定相位落下的特定范围。
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公开(公告)号：US3717818A
公开(公告)日：1973-02-20
申请号：US3717818D
申请日：1972-01-10
申请人： HERBST J
发明人： HERBST J
CPC分类号： G05B1/02 , G01R19/1658 , H02H3/08 , H02H3/46
摘要： An apparatus for indicating the amplitude of an alternating voltage signal including first and second cyclically operating signal integrators which periodically integrate the alternating voltage signal and a reference D.C. signal related to the nominal or desired amplitude of the alternating voltage signal. The integrators operate in synchronism with the alternating voltage signal. The two integrated signals are periodically compared for amplitude and polarity differences. There is also provided means for periodically comparing the integrated alternating voltage signal with another reference D.C. signal representing the nominal or desired frequency thereof to indicate the instantaneous frequency of the alternating voltage signal.
摘要翻译： 用于指示交流电压信号的幅度的装置，包括周期性地对交流电压信号进行积分的第一和第二循环操作信号积分器和与交流电压信号的标称或期望幅度相关的参考直流信号。 积分器与交流电压信号同步工作。 周期性地比较两个积分信号的幅度和极性差异。 还提供了用于周期性地将积分交流电压信号与表示其额定或期望频率的参考直流信号进行比较的装置，以指示交流电压信号的瞬时频率。
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3.发明授权Voltage-controlled oscillator selectively injection locked to stable frequency harmonics 失效电压控制振荡器选择性注入锁定到稳定的频率谐波
公开(公告)号：US3626315A
公开(公告)日：1971-12-07
申请号：US3626315D
申请日：1970-04-07
申请人： SPERRY RAND CORP
发明人： STIRLING RONALD C , BARNUM JOHN L
摘要： A signal source and harmonic signal selector for application in frequency-coherent signal generators or synthesizers and in precision radio communication systems features a novel frequency conversion process to obtain pluralities of selectable stable frequency signals from one source. A stable oscillator is employed to excite the desired plurality of signals in a harmonic comb generator. An injection oscillator, controlled by a selected unidirectional voltage level, is used as a filter to select a desired one of the array of harmonically related signals. Means are provided for purifying the spectrum of the selected output signal.
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4.发明授权
公开(公告)号：US3512103A
公开(公告)日：1970-05-12
申请号：US3512103D
申请日：1968-06-14
申请人： CIT ALCATEL
发明人： BERMAN LEON
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公开(公告)号：US4147993A
公开(公告)日：1979-04-03
申请号：US855300
申请日：1977-11-28
CPC分类号： H03L7/183 , H03J5/0272 , H03J7/065
摘要： An electrical signal generator for generating signals at specific frequencies includes means for producing an adjustable frequency output, adjusting means for causing changes in the output frequency, and control means for adjustably pre-selecting the sizes of the frequency changes. In this way, the operator can be provided with a frequency changing control which, when operated, causes the output frequency to change in predetermined steps.
摘要翻译： 用于以特定频率产生信号的电信号发生器包括用于产生可调频率输出的装置，用于引起输出频率变化的调节装置和用于可调节地预先选择频率变化大小的控制装置。 以这种方式，操作者可以具有频率变化控制，其在操作时使输出频率以预定步骤改变。
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6.发明授权
公开(公告)号：US4020419A
公开(公告)日：1977-04-26
申请号：US476503
申请日：1974-06-05
申请人： Fred W. Caspari , Wayne C. Johnson
发明人： Fred W. Caspari , Wayne C. Johnson
IPC分类号： H03J7/18 , H03J5/02 , H03J7/02 , H03J7/06 , H03J7/28 , H03L7/06 , H03L7/181 , H04B1/26 , H04N5/44 , H03B3/08
CPC分类号： H03J7/06 , H03J5/0245
摘要： An all electronic tuning system is described for establishing a frequency of a local oscillator in a television receiver. When a channel selection is made, a number representing the desired channel is entered in a memory circuit. A first plurality of frequencies is generated in response to a channel selection, and a VCO employed as a local oscillator is caused to increase in frequency. When the VCO frequency differs from the first plurality of frequencies by a predetermined amount, a second plurality of frequencies is generated. Each frequency generated in said second plurality of frequencies is compared with said VCO frequency. When a predetermined difference exists between said VCO frequency and said second plurality of frequencies, a count is recorded. When the recorded count is equivalent to the number obtained in the memory circuit, the VCO tuning is inhibited and the VCO frequency is stabilized until a subsequent channel selection is made.
摘要翻译： 描述了用于在电视接收机中建立本地振荡器的频率的全电子调谐系统。 当进行频道选择时，表示期望频道的号码被输入到存储器电路中。 响应于信道选择产生第一多个频率，并且使用作为本地振荡器的VCO频率增加。 当VCO频率与第一多个频率不同预定量时，产生第二多个频率。 将在所述第二多个频率中产生的每个频率与所述VCO频率进行比较。 当在所述VCO频率和所述第二多个频率之间存在预定的差异时，记录计数。 当记录的计数等于在存储器电路中获得的数量时，VCO调谐被禁止，并且VCO频率稳定，直到进行随后的频道选择。
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公开(公告)号：US3832651A
公开(公告)日：1974-08-27
申请号：US32507173
申请日：1973-01-19
申请人： RCA CORP
发明人： NARAYAN S
摘要： A circuit is presented which has the capability of dividing an input frequency by an integer in order to achieve an output frequency within a specified range. This dynamic dividing circuit is capable of multi-gigabit rate operation.
摘要翻译： 提出了具有将输入频率除以整数的能力的电路，以便实现在指定范围内的输出频率。 这种动态分频电路能够进行多千兆比特率的操作。
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公开(公告)号：US3449690A
公开(公告)日：1969-06-10
申请号：US3449690D
申请日：1967-07-26
申请人： CIT ALCATEL
发明人： BERMAN LEON
CPC分类号： H03L7/20
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公开(公告)号：US4186342A
公开(公告)日：1980-01-29
申请号：US848559
申请日：1977-11-04
申请人： Robert R. Kyle
发明人： Robert R. Kyle
CPC分类号： H05K5/0017 , H04B1/03 , H04B1/401 , H03L7/193 , H04B2001/3894
摘要： An improved marine radio telephone is disclosed which has a housing having an angular opening suitable for either above or below eye level installation and a chassis having printed wiring board support members including a tiltable front panel support member for adapting the front panel to correspond to the position of the housing when mounted therein and a rear support member for supporting the transmitter board and heat sink for improved heat dissipation. The front panel includes a keyboard having keys for selecting digits 0 to 9, an emergency channel, and weather channels, a display for displaying the channel selected, control knobs for volume and squelch control, and switches for power and U.S.A. or international channel selection. The printed wiring boards include a front panel board, a digital input/output and power board, a frequency synthesizer board, a receiver board and a transmitter board. The front panel board sends operating signals to and receives outputs from the other boards. The digital input/output board includes a digital detector means for producing binary coded numbers representative of the keys pressed, a load control means for alternately loading the binary coded numbers into a tens register and a units register, an illegal channel detector connected to the tens and units registers for detecting an improper channel selection, and a memory connected to the units register and producing in response to binary coded numbers for legal channels a synthesizer address code for the channel selected. The synethesizer board is connected to the digital input/output and power board to provide, in response to the synthesizer address code, a local oscillator signal for the receiver clearing receiver operation and an audio modulated signal for transmission during transmitter operation. A phase lock loss signal is produced for preventing illegal operation. The receiver board includes an improved squelch circuit which provides for fine tuning to eliminate noise without unnecessarily reducing the audio signal.
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公开(公告)号：US4103250A
公开(公告)日：1978-07-25
申请号：US836122
申请日：1977-09-23
CPC分类号： H03L7/189
摘要： The output of a fast frequency hopping VCO is mixed with the output of a conventional slow acquisition frequency synthesizer to produce an IF which is applied to a frequency discriminator where the IF is compared with a reference IF to provide an error signal which is digitized and stored in a memory. Subsequently, the error signal is applied together with a command signal to the VCO to obtain the desired frequency output.
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