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51. 发明授权

US4253195A FM-Receiver comprising a search tuning system 失效
标题翻译： FM接收机包括搜索调谐系统
公开(公告)号：US4253195A
公开(公告)日：1981-02-24
申请号：US086921
申请日：1979-10-22
申请人： Arnoldus Garskamp
发明人： Arnoldus Garskamp
IPC分类号： H03J7/28 , H03J7/18 , H03J7/26 , H04B1/16
CPC分类号： H03J7/18 , H03J7/26
摘要： FM-receiver comprising a search tuning arrangement, a control device for making the search tuning arrangement operative, a frequency discriminator and a stop-pulse generator having a threshold and being connected to an output of the frequency discriminator and supplying, when its threshold voltage is passed by the output voltage of the frequency discriminator, a stop-pulse for rendering the search tuning arrangement inoperative, the demodulation sensitivity of the frequency discriminator being brought from a maximum to a minimum level in order to prevent false stop-pulses from being generated in response to the fact the threshold voltage is exceeded by detected audio signals and said detection sensitivity being brought from the minimum to the maximum level when the search tuning arrangement is made operative, in order to enable tuning to weak and/or adjacent transmitters during the search tuning process.
摘要翻译： FM接收机包括搜索调谐装置，用于使搜索调谐装置工作的控制装置，具有阈值的频率鉴别器和停止脉冲发生器，并连接到鉴频器的输出，并且当其阈值电压为通过鉴频器的输出电压，使用于使搜索调谐装置不起作用的停止脉冲，将鉴频器的解调灵敏度从最大值提高到最小值，以防止产生错误停止脉冲响应于检测到的音频信号超过阈值电压的事实，并且当搜索调谐装置可操作时，所述检测灵敏度从最小值到最大电平，以便能够在搜索期间调谐到弱和/或相邻发射机调整过程。

52. 发明授权

US4053838A Radio receiver 失效
标题翻译：无线电接收机
公开(公告)号：US4053838A
公开(公告)日：1977-10-11
申请号：US643640
申请日：1975-12-23
申请人： Yuji Amaya
发明人： Yuji Amaya
IPC分类号： H03J5/02 , H03J7/08 , H03J7/26 , H04B1/34
CPC分类号： H03J7/26 , H03J5/0218 , H03J7/08
摘要： The tuning circuit of an automatically tuned radio receiver comprises a semiconductor variable capacitance element and is supplied with control voltage from a voltage memory element. The voltage memory element is controlled in the polarity of input voltage and feeding time by a search control circuit and thereby its output voltage level varies upward or downward until the tuning circuit tunes to the selected broadcasting frequency. When the tuning circuit tunes to the broadcasting frequency, the search operation is suspended and the receiver is in the receiving condition. During this time, the voltage memory element stably maintains the output voltage memorized at the tuning period. The voltage memory element is controlled by the AFC voltage during the receiving condition and operates as an element of the AFC loop.
摘要翻译：自动调谐的无线电接收机的调谐电路包括半导体可变电容元件，并从电压存储元件提供控制电压。电压存储元件通过搜索控制电路被控制在输入电压和馈送时间的极性，从而其输出电压电平向上或向下变化，直到调谐电路调谐到所选择的广播频率。当调谐电路调谐到广播频率时，搜索操作被暂停，接收机处于接收状态。在此期间，电压存储元件稳定地保持存储在调谐周期的输出电压。电压存储元件在接收状态下由AFC电压控制，并作为AFC回路的元件工作。

53. 发明授权

US4009438A Superheterodyne receiver with a digitally adjustable tuning arrangement 失效
标题翻译：超外差式接收器，具有数字可调整的调谐装置
公开(公告)号：US4009438A
公开(公告)日：1977-02-22
申请号：US481031
申请日：1974-06-20
申请人： Lothar Grohmann
发明人： Lothar Grohmann
IPC分类号： H03J5/02 , H03J7/26 , H03J7/28 , H04B1/26
CPC分类号： H03J7/28 , H03J5/0245 , H03J7/26
摘要： The invention provides a superheterodyne receiver having a digitally adjustable tuning arrangement which permits wide adjustable frequency ranges and in which nearly no deviation from the adjusted frequency occurs over the entire adjustable frequency range.
摘要翻译：本发明提供了一种具有数字可调节调谐装置的超外差接收机，其允许宽的可调节频率范围，并且在整个可调整频率范围内几乎没有偏离调节的频率。

54. 发明授权

US3987399A Radio receiver 失效
标题翻译：无线电接收机
公开(公告)号：US3987399A
公开(公告)日：1976-10-19
申请号：US611103
申请日：1975-09-08
申请人： Susumu Yokoyama
发明人： Susumu Yokoyama
IPC分类号： H03G3/34 , H03J7/26 , H04B1/26
CPC分类号： H03J7/26 , H03G3/348
摘要： A radio receiver using an oscillator to generate a desired frequency at equal intervals as a local oscillator is disclosed. The radio receiver includes a time constant circuit initiated by turning on the receiver power supply. A pulse signal generator is controlled by the time constant circuit and generates a pulse after a desired time. This pulse is applied to the local oscillator to vary temporarily its oscillating frequency, thereby enabling the oscillating frequency of the local oscillator to be pulled into a frequency corresponding to a desired broadcasting station. A control voltage generator responsive to the IF amplifier and detector of the receiver operates to block the output of the pulse signal generator when it is detected that the frequency of the local oscillator has pulled into the frequency corresponding to the desired broadcasting station. A muting circuit is responsive to the pulse signal generator to prevent an output from the receiver until the frequency of the local oscillator has pulled into the frequency corresponding to the desired broadcasting station.
摘要翻译：公开了一种使用振荡器产生与本地振荡器等间隔的期望频率的无线电接收机。无线电接收机包括通过接通接收机电源而启动的时间常数电路。脉冲信号发生器由时间常数电路控制，并在所需时间后产生脉冲。该脉冲被施加到本地振荡器以暂时改变其振荡频率，从而使得本地振荡器的振荡频率能够被拉到与期望的广播电台相对应的频率。响应于IF放大器和接收器的检测器的控制电压发生器在检测到本地振荡器的频率已经被拉入到对应于期望的广播电台的频率时阻止脉冲信号发生器的输出。静音电路响应于脉冲信号发生器，以防止来自接收机的输出，直到本地振荡器的频率已经被拉入到对应于期望的广播电台的频率。

55. 发明授权

US3986154A Automatic tuning apparatus 失效
标题翻译：自动调谐装置
公开(公告)号：US3986154A
公开(公告)日：1976-10-12
申请号：US594774
申请日：1975-07-10
申请人： Yasuhiro Yamada , Kazuyoshi Tsukamoto , Yoshiaki Sakauchi , Kazufumi Ushijima
发明人： Yasuhiro Yamada , Kazuyoshi Tsukamoto , Yoshiaki Sakauchi , Kazufumi Ushijima
IPC分类号： H03J7/26 , H03J3/18
CPC分类号： H03J7/26
摘要： An automatic tuning apparatus comprising a tuner having a tank circuit employing a voltage controlled variable capacitance diode as a circuit element, which diode is supplied in the reverse direction with a scanning control voltage from a solid state potential memory device, which control voltage is varied under the control of a scanning voltage control circuit to scan the frequencies in the frequency band by the tuner and is set by a scan stop signal obtained from the tuner as a result of tuning of the tuner to a certain frequency, and a pair of manual switches for upward and downward scanning, a first flip-flop to be reset by the closing of either manual switch and to be set by the scan stop signal, a second flip-flop to be set and reset by the closing of the downward and upward scanning switches, respectively, a third flip-flop to be set and reset by the closing of both manual switches and caused to be reversed in the storing state thereof when the scanning voltage reaches the maximum or minimum value thereof, the said scanning voltage control circuit being controlled by the logical combination of the storing state of these flip-flops such that the frequency is scanned gradually in the direction as selected by the manual switch but rapidly in the direction not selected by the switch.
摘要翻译：一种自动调谐装置，包括具有采用电压控制的可变电容二极管作为电路元件的储能电路的调谐器，该二极管以相反的方向由来自固态电位存储器件的扫描控制电压提供，该控制电压在下控制扫描电压控制电路以通过调谐器扫描频带中的频率，并且通过由调谐器获得的扫描停止信号作为调谐器的特定频率而设置的一对手动开关为了向上和向下扫描，第一触发器通过关闭手动开关而被复位并由扫描停止信号设定，第二触发器被设置并通过关闭向下和向上扫描来复位开关分别通过两个手动开关的闭合来设置和复位第三触发器，并且当扫描电压达到最大值时在其存储状态下被反转所述扫描电压控制电路由这些触发器的存储状态的逻辑组合来控制，使得频率沿着手动开关选择的方向逐渐扫描，但是在未被选择的方向上快速扫描通过开关。

56. 发明授权

US3980968A Non-proportionate AFC system 失效
标题翻译：非比例的AFC系统
公开(公告)号：US3980968A
公开(公告)日：1976-09-14
申请号：US538222
申请日：1975-01-02
申请人： John Y. Ma
发明人： John Y. Ma
IPC分类号： H03J7/26 , H03B3/04
CPC分类号： H03J7/26
摘要： A television tuning system has a ramp voltage source including an electrical current source and an electrical current sink coupled through selectively operable transmission gates for varying the voltage of a tuning capacitor to control a local oscillator for tuning independent of received signal. The local oscillator signal is mixed with a received signal to produce an intermediate frequency signal which is amplified in an IF amplifier. A frequency detector is coupled to the IF amplifier and produces an error signal dependent upon the frequency difference between a reference frequency and the IF signal. An additional current source and sink are coupled to the tuning capacitor through transmission gates controlled by the error signals. Differences greater than a predetermined amount selectively activate the latter transmission gates to provide substantially constant magnitude tuning voltage corrections irrespective of the amount of the difference.
摘要翻译：电视调谐系统具有包括电流源的斜坡电压源和通过选择性可操作的传输门耦合的电流宿，用于改变调谐电容器的电压以控制本地振荡器以独立于接收信号进行调谐。本地振荡器信号与接收信号混合以产生在IF放大器中被放大的中频信号。频率检测器耦合到IF放大器，并产生取决于参考频率和IF信号之间的频率差的误差信号。附加的电流源和吸收器通过由误差信号控制的传输门耦合到调谐电容器。大于预定量的差异选择性地激活后一个传输门，以提供基本恒定的幅度调谐电压校正，而与该差的量无关。

57. 发明授权

US3968441A Receiver tuning circuit with automatic search and AFC using common capacitor 失效
标题翻译：接收机调谐电路，具有自动搜索和AFC使用普通电容
公开(公告)号：US3968441A
公开(公告)日：1976-07-06
申请号：US509803
申请日：1974-09-27
申请人： Arnoldus Garskamp
发明人： Arnoldus Garskamp
IPC分类号： H03J7/18 , H03J1/06 , H03J7/02 , H03J7/20 , H03J7/26 , H04B1/32
CPC分类号： H03J7/26
摘要： A station finder which switches to automatic frequency control during automatic finding in case of reception of a transmitter and, if desired, continues to find a transmitter some time later with the frequency control switched off.
摘要翻译：在接收到发射机的情况下在自动寻找期间切换到自动频率控制的测站仪，并且如果需要，在频率控制被关闭的时间之后，继续寻找发射机。

58. 发明授权

US3967057A Automatic tuning apparatus 失效
标题翻译：自动调谐装置
公开(公告)号：US3967057A
公开(公告)日：1976-06-29
申请号：US436534
申请日：1974-01-25
申请人： Kazuyoshi Tsukamoto , Yoshiaki Sakauchi , Yukio Saito , Kazufumi Ushijima
发明人： Kazuyoshi Tsukamoto , Yoshiaki Sakauchi , Yukio Saito , Kazufumi Ushijima
IPC分类号： H01M10/36 , H03J5/02 , H03J7/08 , H03J7/26 , H03L7/14 , H04N5/60 , H03J1/02 , H04B1/32 , H04B3/04
CPC分类号： H01M10/0562 , H03J5/0218 , H03J7/08 , H03J7/26 , H03L7/14
摘要： An automatic tuning apparatus, such as an automatic channel selector as incorporated in a television receiver, comprising a tuner using a voltage controlled variable capacitance diode such that the variable capacitance thereof constitutes a portion of a tuning circuit of the tuner for changing the tuning frequency, and a solid state electrochemical potential memory devices an output voltage of which is clamped as selected by selective manual operation, the resultant voltage being applied to the capacitance diode in a reverse direction, which memory device is controlled so as to be charged or discharged in response to selective manual operation until an increased or decreased terminal voltage thereof decreases or increases the capacitance across the diode and thus increases or decreases the tuning frequency of the tuner and a particular frequency is tuned. An intermediate frequency output, obtained as a result of tuning, is used to disable the abovementioned charging or discharging operation of the potential memory device.
摘要翻译：诸如并入电视接收机中的自动频道选择器的自动调谐装置包括使用电压控制可变电容二极管的调谐器，使得其可变电容构成用于改变调谐频率的调谐器的调谐电路的一部分，以及通过选择性手动操作来选择其输出电压被固定的固态电化学电位存储器件，所得到的电压被反向施加到电容二极管，该存储器件被控制为响应于充电或放电选择性手动操作，直到其增加或减少的端电压降低或增加二极管两端的电容，从而增加或减少调谐器的调谐频率，并调整特定频率。作为调谐结果获得的中频输出用于禁止上述潜在存储器件的充电或放电操作。

59. 发明授权

US3893113A Tracking receiver 失效
标题翻译：跟踪接收器
公开(公告)号：US3893113A
公开(公告)日：1975-07-01
申请号：US42584173
申请日：1973-12-18
申请人： BBC BROWN BOVERI & CIE
发明人： ITEN PAUL D , MASTNER JIRI
IPC分类号： G01S13/50 , G01S17/50 , H03J7/26 , G01S9/44
CPC分类号： H03J7/26 , G01S17/50
摘要： A tracking receiver particularly for use in the radar art for determining the frequency of Doppler signals in laser-Doppler flow probes includes a voltage-controlled oscillator the control voltage of which is varied during search operations until the frequency of the converted input signal comes to lie in the band pass of an intermediate frequency stage and so produces in a frequency discriminator a regulating voltage for the voltagecontrolled oscillator and with a threshold-value logic controlled by a peak-value detector connected to the intermediate-frequency stage for switching over the output of the frequency discriminator depending upon the intermediate frequency signal. Switching over of the frequency discriminator takes place only when the output signal from the intermediate frequency stage approaches the peak value of the output signal stored during the preceding search operation covering the whole tuning range of the receiver, or reaches a specific fraction of the peak value.
摘要翻译：专门用于雷达技术中用于确定激光多普勒流量探头中的多普勒信号频率的跟踪接收器包括其控制电压在搜索操作期间变化的压控振荡器，直到转换的输入信号的频率变为在中频级的频带中，因此在频率鉴别器中产生用于压控振荡器的调节电压以及由连接到中频级的峰值检测器控制的阈值逻辑，用于切换根据中频信号输出鉴频器。只有当来自中频级的输出信号接近在覆盖接收机的整个调谐范围的前一次搜索操作期间存储的输出信号的峰值，或达到峰值的特定分数时才进行鉴频器的切换。

60. 发明授权

US3820027A Circuit arrangement for automatic station search 失效
标题翻译：电路设计自动搜索
公开(公告)号：US3820027A
公开(公告)日：1974-06-25
申请号：US30360772
申请日：1972-11-03
申请人： SCHWER SOEHNE GMBH A
发明人： MAIER G
IPC分类号： H03J7/26 , H04B1/32
CPC分类号： H03J7/26
摘要： A circuit arrangement for controlling tuning operations in a high frequency receiver employs a high impedance such as a fieldeffect transistor coupled between a capacitor and tuning varactors. The capacitor is connected via a relay contact, to either chassis ground or to a charging voltage source depending on the desired search direction. The relay is controlled by a first bistable multivibrator as a function of the state of a second bistable multivibrator. When a station signal is detected there is directed to the first multivibrator a pulse which is derived directly from said station signal. The relay is switched off, via a switching stage controlled by the first multivibrator, to thereby disconnect the charging capacitor from the source and stopping the tuning operation.

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