公开(公告)号：US4005256A

公开(公告)日：1977-01-25

申请号：US628072

申请日：1975-11-03

申请人： Rangaswamy Arumugham

发明人： Rangaswamy Arumugham

IPC分类号： H03J7/10 ,  H04B1/16

CPC分类号： H03J7/10

摘要： A signal combining circuit for combining a tuning bias voltage and an automatic frequency control error voltage for application to a voltage controlled radio frequency tuning means for a television receiver is shown. The voltage controlled radio frequency tuning means has a non-linear frequency versus voltage characteristic and the signal combining circuit includes a resistance means for coupling the error voltage to the tuning means input in a manner that compensates for the non-linearity of the frequency versus voltage characteristic of the tuning means to provide a substantially constant automatic frequency control pull-in range throughout the frequency range of interest.

摘要翻译： 示出了用于组合调谐偏置电压和自动频率控制误差电压的信号组合电路，用于电视接收机的压控射频调谐装置。 压控射频调谐装置具有非线性的频率对电压特性，信号组合电路包括用于以补偿频率对电压的非线性的方式将误差电压耦合到调谐装置输入的电阻装置 该调谐装置的特征在于在感兴趣的整个频率范围内提供基本恒定的自动频率控制拉入范围。

公开(公告)号：US3959728A

公开(公告)日：1976-05-25

申请号：US541114

申请日：1975-01-15

申请人： Kazuhiko Yamazaki ,  Takeshi Saitoh ,  Yoshio Miura

发明人： Kazuhiko Yamazaki ,  Takeshi Saitoh ,  Yoshio Miura

IPC分类号： H03B1/00 ,  H03B5/12 ,  H03J7/10 ,  H03B3/04 ,  H04B1/16

CPC分类号： H03J7/10 ,  H03B5/1203 ,  H03B5/1231 ,  H03B5/1243 ,  H03B5/1262 ,  H03B2200/004 ,  H03B2200/0048 ,  H03B2200/0056 ,  H03B2201/0208

摘要： A local oscillation circuit for a tuner having a reduced inter-channel deviation in AFC sensitivity. The local oscillation circuit comprises a resonance circuit capable of varying a tuning frequency by means of a variable capacitive element additionally provided with a variable capacitive diode which is applied with a control voltage in dependence upon variation in the frequency detected from the output signal of the tuner, thereby to effect an automatic frequency control. A single variable capacitive diode is coupled to the variable capacitive element of the resonance circuit in a parallel and a series connections.

摘要翻译： 用于调谐器的本地振荡电路，具有减小的AFC灵敏度的信道间偏差。 本地振荡电路包括谐振电路，该谐振电路能够通过另外设置有可变电容二极管的可变电容元件来改变调谐频率，该可变电容二极管根据调谐器的输出信号检测到的频率变化而施加控制电压 ，从而实现自动频率控制。 单个可变电容二极管以并联和串联连接耦合到谐振电路的可变电容元件。

公开(公告)号：US3940554A

公开(公告)日：1976-02-24

申请号：US494091

申请日：1974-08-02

申请人： Mitsuya Masuda

发明人： Mitsuya Masuda

IPC分类号： H03J7/10 ,  H04N5/50

CPC分类号： H03J7/10 ,  H04N5/50

摘要： An automatic frequency control device is disclosed wherein the S-shaped waveform character voltage derived by the FM detection of the video intermediate frequency signal is applied to a local oscillator so as to correct its oscillation frequency. The S-shaped waveform character voltage is corrected in response to the output voltage derived by the detection of the sound carrier of the adjacent receiving channel so that the pull-in range may be increased.

摘要翻译： 公开了一种自动频率控制装置，其中通过视频中频信号的FM检测导出的S形波形字符电压被施加到本地振荡器，以便校正其振荡频率。 响应于通过相邻接收通道的声音载波的检测导出的输出电压来校正S形波形字符电压，从而可以增加引入范围。

公开(公告)号：US3753172A

公开(公告)日：1973-08-14

申请号：US3753172D

申请日：1972-09-11

申请人： MATSUSHITA ELECTRIC IND CO LTD

发明人： SAKAMOTO Y

IPC分类号： H03J7/10 ,  H03J5/02 ,  H03B3/04

CPC分类号： H03J7/10

摘要： A tuning system in which a tuning voltage is applied from a voltage holding circuit including a capacitor to a tuning circuit using a variable capacitance diode. When the terminal voltage across the capacitor is reduced, the capacitor is charged from a power supply through a switch to compensate the reduction. When the frequency of the tuning circuit is changed to a predetermined extent, the switch is closed to recover the initial level of the voltage of the voltage holding circuit.

摘要翻译： 调谐系统，其中使用可变电容二极管将调谐电压从包括电容器的电压保持电路施加到调谐电路。 当电容器两端的端子电压降低时，电容器通过开关从电源充电以补偿减小。 当调谐电路的频率改变到预定的程度时，开关闭合以恢复电压保持电路的电压的初始电平。

公开(公告)号：US3626215A

公开(公告)日：1971-12-07

申请号：US3626215D

申请日：1970-08-24

申请人： JOHANNA ELISABETH RENK ,  SIBYLLE FREIA BERGMANN ,  INGO WOLFRAM RENK ,  SIEMENS AG

发明人： SCHATTER ECKART ,  RENK HANS ULRICH

IPC分类号： H03J7/02 ,  H03G11/00 ,  H03J7/10 ,  H03L7/02 ,  H03K1/16

CPC分类号： H03J7/10 ,  H03G11/002

摘要： Two directional voltages in mutual phase opposition corresponding to the degree and direction of detuning are applied to the base electrodes of corresponding ones of first and second input transistors. Each of the first and second input transistors has a collector electrode connected to a source of supply voltage and an emitter electrode connected to a source of reference voltage via a corresponding one of a pair of ohmic emitter resistors. First and second output transistors are connected in parallel with each other in opposite conductance directions between the emitter electrodes of the input transistors. Each of the first and second output transistors has an emitter electrode directly connected to the emitter electrode of a corresponding one of the input transistors, a collector electrode connected to the emitter electrode of a corresponding one of the input transistors via a corresponding one of one of two pairs of ohmic resistors and a base electrode connected to the emitter electrode of a corresponding one of the input transistors via a corresponding one of the other of the two pairs of ohmic resistors. An output magnitude corresponding to the trimming voltage is derived from the collector electrodes of the output transistors.

公开(公告)号：US4891708A

公开(公告)日：1990-01-02

申请号：US312947

申请日：1989-02-21

申请人： Mitsuhiro Baba

发明人： Mitsuhiro Baba

IPC分类号： H03J7/08 ,  H03J5/02 ,  H03J7/02 ,  H03J7/10 ,  H04B1/18 ,  H04N5/50

CPC分类号： H03J5/0254 ,  H03J7/02 ,  H03J7/10 ,  H04N5/50

摘要： A pulse signal whose duty ratio differs for selected channels is coupled with the base of a first transistor as a switching transistor. The switching transistor is connected at the collector to a voltage source via a load resistor, and at the emitter to a reference potential point. An inverted pulse signal, which is derived from the collector of the first transistor, is rectified by a rectifying filter including a capacitor, and subsequently is applied to a tuning voltage terminal of an electronic tuner. A DC voltage proportional to an AFT voltage is applied to the base of a second transistor whose collector-emitter major current path is connected between a charge/discharge path of the capacitor and the reference potential point. A current flow through the major current path for a period of time, which differs for selected channels.

摘要翻译： 对于所选择的通道，其占空比不同的脉冲信号与作为开关晶体管的第一晶体管的基极耦合。 开关晶体管通过负载电阻器在集电极处连接到电压源，并且在发射极处连接到参考电位点。 由第一晶体管的集电极导出的反相脉冲信号由包括电容器的整流滤波器整流，随后被施加到电子调谐器的调谐电压端子。 与AFT电压成比例的直流电压被施加到集电极 - 发射极主电流路径连接在电容器的充电/放电路径与参考电位点之间的第二晶体管的基极。 电流通过主电流路径一段时间，对于选定的通道不同。

公开(公告)号：US4122493A

公开(公告)日：1978-10-24

申请号：US833759

申请日：1977-09-16

申请人： Rangaswamy Arumugham ,  George Hager Kam

发明人： Rangaswamy Arumugham ,  George Hager Kam

IPC分类号： H03J7/10 ,  H04N5/50 ,  H04B1/16

CPC分类号： H03J7/10 ,  H04N5/50

摘要： Circuitry compensating for inherent nonlinearities in the tuning voltage sensitivity of varactor tuners, thereby providing relatively constant AFC pull-in range throughout the band of operating frequencies, is shown. In both the VHF and UHF bands, the AFC system develops an error correction voltage in proportion to the tuning voltage. With respect to reception of VHF channels, a gain switching circuit operates to reduce the proportion of AFC error correction voltage developed on a High Band VHF channel, thereby compensating for increased tuning voltage sensitivity on High Band VHF. With respect to reception of UHF channels, a tuning voltage sensing circuit operates to effect an error correction voltage that is a greater proportion of the tuning voltage when the tuning voltage is above a pre-determined value corresponding to approximately channel 60.

摘要翻译： 示出了补偿变容二极管调谐器的调谐电压灵敏度中的固有非线性的电路，从而在整个工作频率带提供相对恒定的AFC拉入范围。 在VHF和UHF频段中，AFC系统与调谐电压成比例地产生纠错电压。 关于VHF信道的接收，增益切换电路用于降低在高频带VHF信道上产生的AFC误差校正电压的比例，从而补偿在高频带VHF上提高的调谐电压灵敏度。 关于UHF通道的接收，调谐电压感测电路操作以实现当调谐电压高于对应于大约通道60的预定值时调谐电压的较大比例的纠错电压。

公开(公告)号：US4122404A

公开(公告)日：1978-10-24

申请号：US871655

申请日：1978-01-23

申请人： James L. Fuhrman

发明人： James L. Fuhrman

IPC分类号： H03J7/10 ,  H03L7/08 ,  H03B3/04

CPC分类号： H03J7/10 ,  H03L7/08

摘要： A phase detector circuit for use in a phase-lock loop is illustrated wherein a voltage pump is incorporated in the phase detector circuit so as to eliminate the utilization of a comparatively high voltage power supply which is normally required to sufficiently frequency modulate the variable frequency oscillator incorporated in most phase-lock loops.

摘要翻译： 示出了用于锁相环的相位检测器电路，其中在相位检测器电路中并入有电压泵，以便消除通常需要的相对高电压电源的使用，以充分地频率调制可变频率振荡器 并入大多数锁相环。

公开(公告)号：US3914696A

公开(公告)日：1975-10-21

申请号：US43440774

申请日：1974-01-18

申请人： RCA CORP

发明人： EVANS WAYNE WHEELER

IPC分类号： H03J5/02 ,  H03J7/10 ,  H03J7/12 ,  H03J5/24 ,  H04B1/16

CPC分类号： H03J7/12 ,  H03J5/0254 ,  H03J7/10

摘要： Voltage from a reference supply is subdivided to provide a plurality of channel representative tuning voltages for a voltage controlled television tuner. A portion of an automatic fine tuning voltage developed in the television receiver is coupled to the reference voltage supply for providing a feedback voltage to maintain the television receiver on the desired channel frequency. Addition of the portion of the automatic fine tuning voltage and the reference supply voltage is such that the portion of the automatic fine tuning voltage provided to the higher frequency channels is greater than the portion thereof supplied to the lower frequency channels.

摘要翻译： 来自参考电源的电压被细分以为压控电视调谐器提供多个代表性的调谐电压。 在电视接收机中产生的自动微调电压的一部分耦合到参考电压源，以提供反馈电压，以将电视接收机维持在期望的频道频率上。 自动微调电压和参考电源电压的一部分的添加使得提供给较高频率信道的自动微调电压的部分大于其提供给较低频率信道的部分。

公开(公告)号：US3859599A

公开(公告)日：1975-01-07

申请号：US31691472

申请日：1972-12-20

申请人： GEN ELECTRIC

发明人： PEIL WILLIAM

IPC分类号： H03D1/22 ,  H03J7/10 ,  H03D3/14

CPC分类号： H03J7/10 ,  H03D1/2245

摘要： The present invention relates to a signal acquisition network comprising an automatic phase/frequency control network suitable for automatic fine tuning with a wide frequency scanning feature, operative during signal acquisition. Wide frequency scanning is provided by a self quenching oscillator, which provides a low frequency ''''dithering'''' voltage to the AP/FC network to facilitate signal acquisition. The arrangement permits one to combine a large capture bandwidth with accurate narrow band tuning after ''''lock in''''. The invention is suitable for FM and TV application, and may be fabricated using integrated circuit techniques.

摘要翻译： 信号采集网络技术领域本发明涉及一种信号采集网络，其包括适于在信号采集期间操作的宽频扫描特征的自动微调自动相位/频率控制网络。 宽频率扫描由自熄振荡器提供，其向AP / FC网络提供低频“抖动”电压，以促进信号采集。 该装置允许在“锁定”之后将大的捕获带宽与准确的窄带调谐相结合。 本发明适用于FM和TV应用，并且可以使用集成电路技术来制造。