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    Control circuit for establishing voltage-controlled or injection-locked operation of a synthesizer reference oscillator
    41.
    发明授权
    Control circuit for establishing voltage-controlled or injection-locked operation of a synthesizer reference oscillator 失效
    用于建立合成器参考振荡器的电压控制或注入锁定操作的控制电路

    公开(公告)号：US4247834A

    公开(公告)日：1981-01-27

    申请号：US12258

    申请日：1979-02-15

    Applicant: Craig W. Brun ,  Wilfred L. Hand

    Inventor： Craig W. Brun ,  Wilfred L. Hand

    IPC: H03J7/06 ,  H03L7/24 ,  H03L7/00

    CPC classification number: H03J7/065 ,  H03L7/24

    Abstract: In a synthesizer system having a reference oscillator selectively operable in either a voltage-controlled or an injection-locked mode, a circuit for effecting the appropriate mode of operation. The circuit includes an analog gate coupled between the output of a crystal oscillator and the input of the reference oscillator. The analog gate is driven by a logic element responsive to a plurality of signals indicative of specific operating conditions. In particular, the circuit assures that the reference oscillator is coupled to the crystal oscillator, that is, the reference oscillator operates in the injection locked mode, while the synthesizer PLL achieves acquisition.

    Abstract translation: 在具有选择性地在电压控制或注入锁定模式下操作的参考振荡器的合成器系统中，用于实现适当的操作模式的电路。 该电路包括耦合在晶体振荡器的输出端和参考振荡器的输入端之间的模拟栅极。 模拟门由响应于指示特定操作条件的多个信号的逻辑元件驱动。 特别地，电路确保参考振荡器耦合到晶体振荡器，即基准振荡器以注入锁定模式工作，而合成器PLL实现采集。

    Selectively tunable heterodyne receiver
    42.
    发明授权
    Selectively tunable heterodyne receiver 失效
    选择性可调外差接收机

    公开(公告)号：US4175254A

    公开(公告)日：1979-11-20

    申请号：US903255

    申请日：1978-05-05

    Applicant: Alfred Manfreda

    Inventor： Alfred Manfreda

    IPC: H03B1/00 ,  H03B5/32 ,  H03D7/16 ,  H03J7/06 ,  H04B1/26

    CPC classification number: H03J7/065 ,  H03D7/161 ,  H04B1/26 ,  H03B2201/0208 ,  H03B5/32

    Abstract: A selectively tunable heterodyne receiver including a plurality of frequency conversion stages which can be tuned to a desired receiving frequency by the use of two voltages which control the coarse and fine tuning adjustments and wherein the first voltage is supplied to a first injection oscillator to control the harmonic output of a crystal controlled harmonic generator and wherein the second voltage is supplied to a second injection oscillator which is continuously variable within a frequency range corresponding to the frequency spacing between the adjacent harmonics of the harmonic generator and wherein the second oscillator is stabilized to the desired adjusted frequency.

    Abstract translation: 一种选择性可调谐外差接收器，包括多个频率转换级，其可以通过使用控制粗调和微调谐调节的两个电压来调谐到期望的接收频率，并且其中第一电压被提供给第一注入振荡器以控制 晶体控制谐波发生器的谐波输出，并且其中第二电压被提供给在与谐波发生器的相邻谐波之间的频率间隔相对应的频率范围内可连续变化的第二注入振荡器，并且其中第二振荡器稳定到 所需调整频率。

    Frequency counter for a television tuning system
    43.
    发明授权
    Frequency counter for a television tuning system 失效
    电视调谐系统的频率计数器

    公开(公告)号：US4109283A

    公开(公告)日：1978-08-22

    申请号：US688588

    申请日：1976-05-21

    Applicant: Robert Morgan Rast

    Inventor： Robert Morgan Rast

    IPC: H03J5/02 ,  H03J7/06 ,  H04N5/44 ,  H04B1/16 ,  H04B1/32 ,  H04N5/50

    CPC classification number: H03J7/065 ,  H03J5/0272 ,  Y10S331/02

    Abstract: A tuning system for a television receiver includes a local oscillator which is controlled first by a phase lock loop arrangement and then by an AFT discriminator arrangement for tuning the receiver to non-standard as well as standard frequency carriers. The phase lock loop arrangement includes a programmable divider for dividing the local oscillator frequency by a programmable factor corresponding to the presently selected channel. When the local oscillator is being controlled by the AFT discriminator arrangement, the count accumulated by the programmable divider during a reference interval determines how far the local oscillator frequency has drifted from its nominal value. If a predetermined frequency offset has been exceeded, control is returned to phase lock loop control and the programmable factor is incrementally changed.

    Television tuning system with provisions for receiving RF carrier at nonstandard frequency
    44.
    发明授权
    Television tuning system with provisions for receiving RF carrier at nonstandard frequency 失效
    电视调谐系统，用于以非标准频率接收RF载波

    公开(公告)号：US4031549A

    公开(公告)日：1977-06-21

    申请号：US688521

    申请日：1976-05-21

    Applicant: Robert Morgan Rast ,  Charles Martin Wine ,  John Goodchilde Norie Henderson

    Inventor： Robert Morgan Rast ,  Charles Martin Wine ,  John Goodchilde Norie Henderson

    IPC: H03J5/02 ,  H03J7/06 ,  H04N5/50 ,  H04B1/26

    CPC classification number: H03J7/065 ,  H03J5/0272 ,  Y10S331/02

    Abstract: A tuning system for a television receiver includes a phase locked loop for tuning a local oscillator to the nominal local oscillator frequencies required to tune the receiver to RF carriers at standard broadcast frequencies allocated to the various channels a viewer may select. The tuning system also includes an automatic fine tuning (AFT) frequency discriminator for tuning the local oscillator to minimize any deviation between the frequency of an actual picture carrier and the nominal picture carrier frequency. If the receiver is coupled to a television distribution system which provides RF carriers having nonstandard frequencies arbitrarily near respective ones of the standard broadcast frequencies, when the phase locked loop has achieved lock at a nominal frequency, a mode control unit selectively couples the discriminator and a frequency drift control circuit to the local oscillator. If the frequency of the local oscillator drifts more than a predetermined offset from the frequency synthesized under phase locked loop control because no carrier has been detected by the discriminator, discriminator and drift control are terminated so that the receiver will not be tuned to an undesired carrier such as, for example, the lower adjacent channel sound carrier, and phase locked loop control is reinitiated to synthesize a local oscillator signal having a frequency different from the frequency of the originally synthesized local oscillator signal by a predetermined amount. After the phase locked loop is locked at the new frequency, discriminator control is again initiated.

    Abstract translation: 用于电视接收机的调谐系统包括用于将本地振荡器调谐到分配给观众可以选择的各种频道的标准广播频率将接收机调谐到RF载波所需的标称本地振荡器频率的锁相环。 调谐系统还包括用于调谐本地振荡器的自动微调（AFT）鉴频器，以最小化实际图像载波的频率与标称图像载波频率之间的任何偏差。 如果接收机耦合到电视分配系统，该电视分配系统提供具有任意接近标准广播频率的相应标准广播频率的非标准频率的RF载波，则当锁相环已经达到标称频率的锁定时，模式控制单元选择性地将鉴别器和 频率漂移控制电路到本地振荡器。 如果本地振荡器的频率漂移超过在锁相环控制下合成的频率的预定偏移，因为鉴别器没有检测到载波，则终止鉴频器和漂移控制，使得接收机不会被调谐到不需要的载波 例如下相邻声道声音载波，并且重新启动锁相环控制，以将具有与原始合成的本地振荡器信号的频率不同的频率的本地振荡器信号合成预定量。 锁相环锁定在新频率之后，再次启动鉴频器控制。

    Frequency regulation of voltage controlled oscillators using clock-driven digital counters
    45.
    发明授权
    Frequency regulation of voltage controlled oscillators using clock-driven digital counters 失效
    使用时钟驱动数字计数器对电压控制振荡器进行频率调节

    公开(公告)号：US3864637A

    公开(公告)日：1975-02-04

    申请号：US33898673

    申请日：1973-03-07

    Applicant: LOEW OPTA GMBH

    Inventor： KANOW WILLY

    IPC: H03J5/02 ,  H03J7/06 ,  H03J7/28 ,  H03K23/66 ,  H04B1/32

    CPC classification number: H03J7/285 ,  H03J5/0281 ,  H03J7/065 ,  H03K23/665

    Abstract: An arrangement is disclosed for programming a desired count in a first N-stage digital counter employed in a frequency control circuit for a variable voltage oscillator in a radio receiver. A second N-stage digital counter stepped by a clock pulse generator is provided with auxiliary outputs representing the count in each stage thereof in a format compatible with the programming input of the first counter. The count of each stage of the first counter may be set selectively either from a memory bank associated with the corresponding stage of the second counter, or directly from the auxiliary output of such corresponding stage. Means are described for disabling the clock pulse generators whenever the receiver detects a transmitted signal whose amplitude exceeds a predetermined threshold.

    Abstract translation: 公开了一种用于在无线电接收机中用于可变电压振荡器的频率控制电路中采用的第一N级数字计数器中编程期望计数的装置。 由时钟脉冲发生器步进的第二N级数字计数器以与第一计数器的编程输入兼容的格式在其每个级中提供表示计数的辅助输出。 第一计数器的每个级的计数可以选择性地从与第二计数器的对应级相关联的存储体中设置，或者直接来自该对应级的辅助输出。 描述了当接收机检测到振幅超过预定阈值的发射信号时禁止时钟脉冲发生器的装置。

    Phase detector
    48.
    发明授权
    Phase detector 有权
    相位检测器

    公开(公告)号：US09130805B2

    公开(公告)日：2015-09-08

    申请号：US13882804

    申请日：2011-11-01

    Applicant: Yair Linn

    Inventor： Yair Linn

    IPC: H03D3/00 ,  H04L27/20 ,  H04L27/38 ,  H03J7/06 ,  H03D13/00 ,  H04B17/00 ,  H04B17/391

    CPC classification number: H04L27/20 ,  H03D13/00 ,  H03J7/065 ,  H04B17/336 ,  H04B17/391 ,  H04L27/3818

    Abstract: Described are a method for generating a metric that is a function of a phase difference between a modulated carrier and a local carrier, and a phase detector for performing such a method. A baseband symbol is obtained from the modulated carrier, and the phase of the symbol is determined. Assuming that the modulation used to modulate the modulated carrier has a constellation diagram with M-fold rotational symmetry, the metric can be generated from the phase by evaluating a base function that includes a triangle wave having positively and negatively sloped linear segments whose slopes have identical absolute values and that is periodic with a period of 2π/M radians. Alternatively or additionally, if the ideal symbol phases are uniformly distributed, the metric can be generated by evaluating a version of the base function in which the ideal symbol phases correspond to identically valued metrics located on the triangle wave.

    Abstract translation: 描述了用于产生作为调制载波和本地载波之间的相位差的函数的度量的方法，以及用于执行这种方法的相位检测器。 从调制载波获得基带符号，并确定符号的相位。 假设用于调制调制载波的调制具有具有M倍旋转对称性的星座图，则可以通过评估包括具有正斜率和负斜率线性段的三角波的基函数从相位产生度量，其斜率具有相同的 绝对值，周期为2＆pgr / M弧度。 或者或另外，如果理想符号相位被均匀分布，则可以通过评估其中理想符号相位对应于位于三角波上的相同值的度量的基本函数的版本来生成度量。

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