公开(公告)号：US4319276A

公开(公告)日：1982-03-09

申请号：US141516

申请日：1980-04-18

Applicant: Adriaan Cense ,  Maurice C. Gander ,  Donald G. Thompson

Inventor： Adriaan Cense ,  Maurice C. Gander ,  Donald G. Thompson

IPC: H04N5/06 ,  H04N5/12 ,  H04N5/04

CPC classification number: H04N5/12

Abstract: A television receiver including a synchronizing arrangement for providing line and field drive pulses for line and field output stages, which synchronizing arrangement comprises a line oscillator control circuit for controlling the frequency and/or phase of a line oscillator the output signal of which is divided by a divider circuit to produce pulses of field frequency. The divider pulses are applied to a field coincidence stage together with received field synchronizing pulses where their phases are compared and the number of times there is coincidence is counted by a counter and to a controllable switch which also receives field synchronizing pulses from a field oscillator which is driven by received field synchronizing pulses. A mode selection circuit controls the operation of switch which switch is driven into an internal synchronization mode when coincidence is present in the field coincidence stage for a given period, in which mode divider pulses drive the field output stage, and into an external synchronization mode when the above coincidence is not present, in which mode pulses from the field oscillator drive the field output stage. In order to prevent a black bar appearing for a finite period on the display tube of the receiving when changing television channel or the camera is changed in the studio the line oscillator control circuit produces an output which output drives the switch from the internal to the external synchronization mode.

Abstract translation: 一种电视接收机，包括用于线路和场输出级的线和场驱动脉冲的同步装置，该同步装置包括线路振荡器控制电路，用于控制线路振荡器的频率和/或相位，其输出信号被除以 分频器电路产生场频脉冲。 分频器脉冲与接收的场同步脉冲一起施加到场一致级，其中它们的相位被比较，并且存在一致的次数由计数器和可控开关计数，该可控开关也从场振荡器接收场同步脉冲， 由接收的场同步脉冲驱动。 模式选择电路控制开关的操作，该开关的操作在给定时段内在场同步阶段中出现一致时被驱动到内部同步模式，其中模式分频器脉冲驱动场输出级，并且当外部同步模式为 上述一致不存在，其中来自场振荡器的模式驱动场输出级。 为了防止在改变电视频道时在接收机的显示管上出现有限的黑条，或者在演播室中改变摄像机，线路振荡器控制电路产生输出，该输出驱动开关从内部到外部 同步模式。

公开(公告)号：US06555976B2

公开(公告)日：2003-04-29

申请号：US09915654

申请日：2001-07-26

Applicant: Donald G. Thompson

Inventor： Donald G. Thompson

IPC: G09G104

CPC classification number: H04N3/233

Abstract: An apparatus for the correction of East-West distortion of images produced on the screen of a picture tube. More particularly, it concerns an electronic circuit for dynamically controlling the AC component of the drive signal to an East-West amplifier (14) in a picture tube horizontal scanning system. The electronic circuit comprises an input (44,66) for receiving a signal related to the beam current of the tube, an output for connection to the input of the East-West amplifier, a capacitive element (32,64), and an active control device (30,60) for controlling the capacitive element in response to the signal at the circuit input.

Abstract translation: 一种用于校正在显像管屏幕上产生的图像的东西变形的装置。 更具体地说，它涉及一种电子电路，用于将显示管水平扫描系统中的东西放大器（14）的驱动信号的AC分量动态地控制。 电子电路包括用于接收与管的束电流有关的信号的输入端（44,66），用于连接到东西放大器的输入的输出端，电容元件（32,64）和有源 控制装置（30,60），用于响应于电路输入端的信号来控制电容元件。

公开(公告)号：US4771137A

公开(公告)日：1988-09-13

申请号：US107712

申请日：1987-10-13

Applicant: Donald G. Thompson

Inventor： Donald G. Thompson

IPC: H01B17/14 ,  H01B17/16 ,  H01B17/24

CPC classification number: H01B17/145

Abstract: An electric fence wire insulator is formed as an integral, one-piece body of non-conductive synthetic resin and includes a transverse spark shield from which extends in one direction a pair of laterally spaced main legs terminating in a pair of laterally spaced feet configured to abut the arcuate or flat surface of a wooden or metal fence post. Openings through the feet receive nails or screws by which to secure the feet to the fence post. Projecting in the opposite direction from the spark shield are five laterally spaced fingers provided with inwardly facing arcuate grooves which are aligned transversely for the reception of an electric fence wire. Laterally spaced secondary legs inwardly of the main legs are shaped to provide two pairs of split circular retainers of different diameters for the frictional retention of different size rod type fence posts. Inwardly facing sockets on the main legs adjacent the feet frictionally grip between them the laterally extending arms of a T type fence post, the central leg of which may extend into the space between the split retainers of the secondary legs. A pair of shoulders on the main legs are spaced from the spark shield to form a pair of grooves therebetween for the reception of the U-shaped mounting end of a stand-off wire the opposite of which is formed with an open loop for the removable reception of an electric fence wire.

Abstract translation: 电栅栏线绝缘体形成为整体的一体式非导电合成树脂体，并且包括横向火花护罩，其从一个方向延伸一对横向间隔开的主腿，终止于一对横向间隔开的脚，其被配置为 邻接木制或金属围栏柱的弧形或平坦表面。 通过脚的开口接受钉子或螺钉，以将脚固定到围栏柱上。 沿着与火花护罩相反的方向投射有五个横向间隔开的指状物，设有向内的弧形槽，其横向排列以便接收电动围栏线。 主腿内部的横向间隔的副腿被成形为提供不同直径的两对分开的圆形保持器，用于不同尺寸的杆型护栏杆的摩擦保持。 向内面对的主腿上的插座，靠近脚摩擦地夹在它们之间，T型围栏柱的横向延伸的臂，其中心腿可以延伸到次级腿的分离保持器之间的空间中。 主腿上的一对肩部与火花塞隔开，以在其间形成一对凹槽，用于接收支架的U形安装端，其相对形成有用于可拆卸的开环 接收电篱笆线。

公开(公告)号：US4282447A

公开(公告)日：1981-08-04

申请号：US944333

申请日：1978-09-21

Applicant: Christopher P. Summers ,  Donald G. Thompson

Inventor： Christopher P. Summers ,  Donald G. Thompson

IPC: H04N5/06 ,  H03K5/02 ,  H03K17/66 ,  H04N5/04 ,  H04N5/46 ,  H03K5/156 ,  H03K17/76

CPC classification number: H04N5/46 ,  H03K5/02 ,  H04N5/04

Abstract: An interface device for selectively accessing two internal signal paths of an integrated circuit through a single external connection pin. Each of the signal paths is provided with a bias voltage sensitive conduction device that permits conduction at a different externally provided bias voltage that inhibits current flow in the other conduction device. The different bias voltages are provided to the external connection pin through an external load resistor.

Abstract translation: 一种用于通过单个外部连接引脚选择性地访问集成电路的两个内部信号路径的接口装置。 每个信号路径设置有偏置电压敏感传导装置，其允许在不同的外部提供的偏置电压下导通，该偏置电压抑制另一导电装置中的电流流动。 通过外部负载电阻将不同的偏置电压提供给外部连接引脚。