公开(公告)号：US4267529A

公开(公告)日：1981-05-12

申请号：US120182

申请日：1980-02-11

Applicant: Craig W. Brun ,  Wilfred L. Hand

Inventor： Craig W. Brun ,  Wilfred L. Hand

IPC: H03H1/00 ,  H01P5/00

CPC classification number: H03H1/0007

Abstract: An apparatus for coupling a source of signals to a receiver having a ground return electrically coupled to the AC line and for providing immunity from interfering ambient signals. The apparatus includes a coaxial transmission line surrounded at both ends by feedthrough capacitor coupling the outer conductor of the transmission line to the ground return of the signal source. A toroidal ferrite member also surrounds the transmission line between the feedthrough capacitors thereby reducing the current flowing in the outer conductor and the resulting direct pickup of ambient signals.

Abstract translation: 一种用于将信号源耦合到具有电耦合到AC线路的接地返回并且用于提供对干扰环境信号的抗扰性的接收机的装置。 该装置包括一个同轴传输线，两端由馈通电容器耦合，传输线的外导体与信号源的接地返回。 环形铁氧体部件还围绕馈通电容器之间的传输线，从而减少在外部导体中流动的电流和所得到的环境信号的直接拾取。

公开(公告)号：US4145719A

公开(公告)日：1979-03-20

申请号：US837315

申请日：1977-09-28

Applicant: Wilfred L. Hand ,  Craig W. Brun

Inventor： Wilfred L. Hand ,  Craig W. Brun

IPC: H04N5/275 ,  H04N5/22 ,  H03K3/353 ,  H03K17/56

CPC classification number: H04N5/275

Abstract: A high-speed, solid-state, electronic circuit for alternately coupling two separate video signal paths to a third video signal path in response to high frequency square wave excitation, the circuit utilizing two dual-gate metal oxide semiconductor field effect transistors having oppositely phased signals applied to respective switching gates for cancellation of switching transient signals.

Abstract translation: 一种高速，固态电子电路，用于响应于高频方波激励而将两个分离的视频信号路径交替耦合到第三视频信号路径，该电路利用具有相反阶段的两个双栅极金属氧化物半导体场效应晶体管 施加到相应开关门的信号以消除开关瞬态信号。

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。

公开(公告)号：US4208741A

公开(公告)日：1980-06-17

申请号：US956955

申请日：1978-11-02

Applicant: Craig W. Brun ,  Wilfred L. Hand

Inventor： Craig W. Brun ,  Wilfred L. Hand

IPC: H03J7/08 ,  H03L7/24 ,  H03B3/06 ,  H04N5/50

CPC classification number: H03J7/08 ,  H03L7/24

Abstract: A voltage-controllable reference oscillator for a synthesized receiver. In one mode of operation the reference oscillator is injection locked to a crystal-controlled oscillator so that the receiver's local oscillator frequency is a rational multiple of the crystal oscillator frequency. In another mode of operation the reference oscillator is isolated from the crystal-controlled oscillator and its operating frequency is determined by the voltage applied at its tuning control terminal. The control voltage is selectively provided by a manually variable fine tuning circuit or by an AFC circuit. An acquisition delay circuit develops a pulse when a channel is selected or when the source of tuning voltage is changed, thereby assuring that the reference oscillator is operating in the injection-locked mode until the synthesizer phase-locked loop has achieved acquisition.

Abstract translation: 用于合成接收机的电压可控参考振荡器。 在一种工作模式下，参考振荡器被注入锁定到晶体振荡器，使得接收器的本地振荡器频率是晶体振荡器频率的合理倍数。 在另一种工作模式下，参考振荡器与晶体振荡器隔离，其工作频率由其调谐控制端子施加的电压决定。 控制电压由手动微调电路或AFC电路选择性地提供。 当选择通道或调谐电压源改变时，获取延迟电路产生脉冲，从而确保参考振荡器在注入锁定模式下工作，直到合成器锁相环已经获得。

公开(公告)号：US4267602A

公开(公告)日：1981-05-12

申请号：US81751

申请日：1979-10-04

Applicant: Craig W. Brun ,  Wilfred L. Hand

Inventor： Craig W. Brun ,  Wilfred L. Hand

IPC: H03J7/06 ,  H03L7/10 ,  H03B3/06

CPC classification number: H03J7/065 ,  H03L7/10

Abstract: A delay circuit for enhancing acquisition of a synthesizer PLL subsequent to change in the synthesizer's frequency of operation or a change in the source of tuning voltage applied to a voltage-controllable reference oscillator. A control circuit determines whether the reference oscillator operates in a crystal-controlled or in a voltage-controlled mode. The delay circuit includes a monostable having an output coupled to the control circuit and a trigger input coupled to both an ENTER CHANNEL indicator and a pulse generator. The monostable is triggered, thereby assuring temporary crystal-controlled operation of the reference oscillator, in response to an ENTER CHANNEL indicator or to an output from a pulse generator. The pulse generator is responsive to a change in the source of reference oscillator tuning control voltage from, for example, a manually variable fine tuning potentiometer to an AFC control circuit.

Abstract translation: 一种延迟电路，用于在合成器的操作频率变化或施加到电压可控参考振荡器的调谐电压源的变化之后增强对合成器PLL的采集。 控制电路确定参考振荡器是以晶体控制或电压控制模式工作。 延迟电路包括具有耦合到控制电路的输出和耦合到ENTER CHANNEL指示器和脉冲发生器的触发输入的单稳态。 触发单稳态，从而确保响应于ENTER CHANNEL指示器或来自脉冲发生器的输出的参考振荡器的临时晶体控制操作。 脉冲发生器响应于参考振荡器调谐控制电压源从例如手动可变微调电位器到AFC控制电路的变化。

公开(公告)号：US4262307A

公开(公告)日：1981-04-14

申请号：US963879

申请日：1978-11-27

Applicant: Craig W. Brun ,  Wilfred L. Hand

Inventor： Craig W. Brun ,  Wilfred L. Hand

IPC: H03J5/24 ,  H04N5/50

CPC classification number: H03J5/244

Abstract: A circuit for applying a fine tuning voltage to an oscillator operating within distinct ranges of frequency. The fine tuning voltage is tailored so that a substantially equal fine tuning range, for example, .+-.1.5 MHz, is achieved with respect to each of the ranges of frequency. The circuit includes a potentiometer that is connected between two voltage sources. The values of the voltage sources are appropriately varied in response bandswitch information. In a television receiver the values are varied in response to a signal indicating operation on a Low Band VHF, a High Band VHF, or a UHF channel.

Abstract translation: 用于将微调电压施加到在不同频率范围内工作的振荡器的电路。 微调电压被调整为使得相对于每个频率范围实现基本相等的微调范围，例如+/- 1.5MHz。 该电路包括连接在两个电压源之间的电位计。 电压源的值在响应频带开关信息中适当变化。 在电视接收机中，响应于指示在低频带VHF，高频带VHF或UHF信道上的操作的信号而改变值。