Circuit for improving the frequency characteristic of a color television
signal
    1.
    发明授权
    Circuit for improving the frequency characteristic of a color television signal 失效
    用于改善彩色电视信号的频率特性的电路

    公开(公告)号:US4223342A

    公开(公告)日:1980-09-16

    申请号:US966737

    申请日:1978-12-05

    IPC分类号: H04N9/68 H04N9/77 H04N5/14

    CPC分类号: H04N9/77

    摘要: For improving the frequency characteristic of a color television signal, particularly one in which the chrominance component thereof is provided with a bandwidth substantially narrower than that of the luminance component, the luminance component is used to generate a control signal which is proportional to the lack of registration between low and high frequency portions of the luminance component spectrum, and the control signal thus obtained selectively increases and decreases a delay applied to the relatively narrow-bandwidth chrominance component to substantially align its excursions with the excursions of the relatively wide bandwidth luminance component.

    摘要翻译: 为了改善彩色电视信号的频率特性,特别是其中色度分量具有比亮度分量基本上窄的带宽的频率特性,亮度分量被用来产生与缺少比较成比例的控制信号 亮度分量光谱的低频部分和高频部分之间的对准,并且由此获得的控制信号选择性地增加和减少施加到相对窄带宽色度分量的延迟,以使其偏移与相对宽的带宽亮度分量的偏移大致对准。

    Video signal reproducing apparatus with electron beam scanning velocity
modulation
    2.
    发明授权
    Video signal reproducing apparatus with electron beam scanning velocity modulation 失效
    具有电子束扫描速度调制的视频信号再生装置

    公开(公告)号:US4170785A

    公开(公告)日:1979-10-09

    申请号:US854398

    申请日:1977-11-23

    CPC分类号: H04N3/32

    摘要: In a video signal reproducing apparatus having a cathode ray tube in which at least one electron beam is made to scan a screen in line-scanning and vertical directions while the intensity of the beam is modulated to establish the brightness of a video picture to be displayed on the screen, and in which bright picture portions are represented by respective high level portions of a video signal defined between rising and falling edges extending from low level signal portions representing contiguous dark picture portions; a waveshaping circuit receives the video signal and acts thereon to provide a compensated video signal in which the width of each high level portion between the respective rising and falling edges is increased, the compensated video signal is employed to control the intensity of the electron beam, the rising and falling edges of each high level portion of the video signal are detected to provide a beam velocity modulation signal with respective positive and negative peaks by which the scanning velocity of the beam in the line-scanning direction is modulated, and the positions of such positive and negative peaks are shafted, relative to the corresponding peaks of a differentiation of the video signal, in the directions toward the adjacent low level signal portions of the compensated video signal.

    摘要翻译: 在具有阴极射线管的视频信号再现装置中,其中使至少一个电子束在线扫描和垂直方向上扫描屏幕,同时调节光束的强度以建立要显示的视频图像的亮度 并且其中明亮的图像部分由在表示连续的暗图像部分的低电平信号部分延伸的上升沿和下降沿之间限定的视频信号的相应高电平部分表示; 波形成形电路接收视频信号并作用在其上以提供补偿的视频信号,其中相应的上升沿和下降沿之间的每个高电平部分的宽度增加,补偿的视频信号用于控制电子束的强度, 检测视频信号的每个高电平部分的上升和下降沿,以提供具有相应的正和负峰值的光束速度调制信号,通过该峰值扫描沿扫描方向的光束的扫描速度被调制, 相对于视频信号微分的相应峰值,这些正和负峰在朝向补偿视频信号的相邻低电平信号部分的方向上轴向旋转。

    Apparatus for recording and/or reproducing color video signals
    3.
    发明授权
    Apparatus for recording and/or reproducing color video signals 失效
    用于记录和/或再现彩色视频信号的装置

    公开(公告)号:US4012771A

    公开(公告)日:1977-03-15

    申请号:US651791

    申请日:1976-01-23

    IPC分类号: H04N9/84 H04N5/79

    CPC分类号: H04N9/84

    摘要: In apparatus for reproducing color video signals recorded in successive parallel tracks on a record medium with the chrominance components of video signals recorded in next adjacent tracks having first and second carriers which differ from each other in respect to their phases or polarity characteristics; and in which a plurality of transducers scan along the tracks one at a time so as to reproduce the video signals recorded in each of said tracks along with cross-talk signals from the tracks next adjacent thereto, means for separating said chrominance signal components from the luminance signal component in the reproduced signals, and a signal processing circuit including a switching circuit and a comb filter provides the separated chrominance components of video signals reproduced from each of said tracks with a common carrier and eliminates therefrom the chrominance components of the cross-talk signals on the basis of said different phases of the first and second carriers with which the chrominance components were recorded in the tracks which are next adjacent to each other: the changing-over of the switching circuit is controlled in response to the phase of the chrominance component carrier that results therefrom so as to ensure phase alignment of the common carrier with which the chrominance components of the video signals reproduced from the successive tracks are provided. Further, control signals are recorded on the record medium to identify those tracks in which video signals are recorded with their chrominance components having said first and second carriers, respectively, and, on reproducing, such identifying control signals are reproduced to control the movements of the transducers and, through such controlled movements, to regulate the changing-over of the switching circuit.

    摘要翻译: 用于再现记录在记录介质上的连续平行轨道中的彩色视频信号的装置,其中记录在下一相邻轨道中的视频信号的色度分量具有相对于它们的相位或极性特性彼此不同的第一和第二载波; 并且其中多个换能器一次沿轨道扫描一次,以便再现记录在每个所述轨道中的视频信号以及与其相邻的轨道的串扰信号,用于将所述色度信号分量与 再现信号中的亮度信号分量,以及包括切换电路和梳状滤波器的信号处理电路,使用各公共载波从每个所述磁迹再现的视频信号的分离的色度分量提供,从而消除串扰的色度分量 基于第一和第二载波的所述不同相位的信号,其中色度分量被记录在彼此相邻的轨道中:响应于色度的相位来控制切换电路的转换 由此产生的分量载体,以便确保共同载体的相位对准 提供从连续轨道再现的视频信号的色调分量。 此外,控制信号被记录在记录介质上,以分别识别具有其具有所述第一和第二载波的色度分量记录视频信号的那些轨道,并且在再现时,再现这些识别控制信号以控制 传感器,并通过这种受控的运动来调节开关电路的转换。

    Magnetic recording and/or reproducing system
    4.
    再颁专利
    Magnetic recording and/or reproducing system 失效
    磁记录和/或再现系统

    公开(公告)号:USRE29975E

    公开(公告)日:1979-04-24

    申请号:US754982

    申请日:1976-12-28

    IPC分类号: H04N9/84

    CPC分类号: H04N9/84

    摘要: In reducing crosstalk between the low frequency, frequency-converted chrominance portions of h-aligned video signals on adjacent tracks, the frequency converting carrier, but not the entire frequency converted portion, has its polarity inverted at the end of each line interval during the recording of alternate tracks but not during the recording of the remaining alternate tracks. This eliminates the extraneous signal that would otherwise be produced in the balanced modulator of the playback apparatus by any direct voltage offset or transient remanent of a direct voltage offset in the recorded signal.

    Gain control circuits utilizing a novel semiconductor device
    5.
    发明授权
    Gain control circuits utilizing a novel semiconductor device 失效
    利用新型半导体器件的增益控制电路

    公开(公告)号:US3976951A

    公开(公告)日:1976-08-24

    申请号:US562348

    申请日:1975-03-26

    摘要: A gain control circuit of the multistage differential amplifier type comprising a first pair of transistors forming a first differential amplifier supplied with an input signal, a second pair of transistors forming a second differential amplifier connected to amplify further the output of the first differential amplifier and a novel semiconductor device of the three-terminal type connected in common between the respective outputs of both the first pair of transistors and an operating voltage source, in which the gain control is attained by controlling the value of the current flowing through at least one differential amplifier. The novel semiconductor device has a semiconductive body similar to an ordinary transistor and acts as a bidirectionally conductive element with a superior symmetrical characteristic.

    摘要翻译: 多级差分放大器类型的增益控制电路包括形成提供有输入信号的第一差分放大器的第一对晶体管,形成第二差分放大器的第二对晶体管,其连接以进一步放大第一差分放大器的输出和 在第一对晶体管的两个输出端之间共同连接的三端子类型的新型半导体器件和工作电压源,其中通过控制流过至少一个差分放大器的电流的值来获得增益控制 。 该新型半导体器件具有与普通晶体管类似的半导体器件,并且具有优异的对称特性的双向导电元件。

    Gain control circuits
    6.
    发明授权
    Gain control circuits 失效
    增益控制电路

    公开(公告)号:US3988692A

    公开(公告)日:1976-10-26

    申请号:US571686

    申请日:1975-04-25

    摘要: A gain control circuit utilizing a novel bidirectional transistor connected in shunt with a pair of outputs of a differential amplifier circuit. The novel bidirectional semiconductor device has its conduction level controlled by a variable bias source in its base circuit. By adjusting the bias source, the impedance of the bidirectional device is controlled, and hence the magnitude of the output signal developed across its terminals is controlled in gain.

    摘要翻译: 一种增益控制电路,利用与分路的一对输出连接的新型双向晶体管。 该新颖的双向半导体器件在其基极电路中具有由可变偏压源控制的导通电平。 通过调整偏置源,控制双向器件的阻抗,因此在其端子上产生的输出信号的幅度被控制在增益中。

    Multipurpose switching circuits utilizing a novel semiconductor device
    7.
    发明授权
    Multipurpose switching circuits utilizing a novel semiconductor device 失效
    利用新型半导体器件的多功能开关电路

    公开(公告)号:US3980900A

    公开(公告)日:1976-09-14

    申请号:US562176

    申请日:1975-03-26

    CPC分类号: H03D5/00 H01L27/00 H03D1/229

    摘要: A multipurpose switching circuit of the balanced type constituting a pair of switching paths each formed by first and second transistors connected in series and supplied with an input signal and a switching signal, respectively, and a novel semiconductor device of the three-terminal type with first and third terminals connected to both of the pair of switching paths, respectively, and a second terminal connected to an output terminal of the circuit. The respective second transistors of both the paths cause the switching operation to alternate in accordance with the switching signal, and both the input signals supplied to the respective first transistors of the pair of switching paths are alternately switched to the output terminal through the novel semiconductor device in response to the switching operation of the first transistors. The novel semiconductor device has a semiconductor body similar to an ordinary transistor and acts as a bidirectionally conductive element with superior symmetrical characteristics.

    摘要翻译: 一种平衡型的多用途开关电路,其构成一对开关路径,每个开关路径分别由串联连接的第一和第二晶体管提供输入信号和开关信号,并且分别具有三端型的新型半导体器件 以及分别连接到所述一对开关路径两者的第三端子和连接到所述电路的输出端子的第二端子。 两个路径的相应的第二晶体管使得开关操作根据切换信号交替,并且提供给该对开关路径中的各个第一晶体管的两个输入信号通过新颖的半导体器件交替切换到输出端 响应于第一晶体管的开关操作。 新颖的半导体器件具有与普通晶体管相似的半导体本体,并且具有优异的对称特性的双向传导元件。

    Signal amplifying circuit
    8.
    发明授权
    Signal amplifying circuit 失效
    信号放大电路

    公开(公告)号:US4021749A

    公开(公告)日:1977-05-03

    申请号:US547583

    申请日:1975-02-06

    摘要: A signal amplifying circuit including an amplifying transistor having its base-emitter terminals connected to a signal source. A diode having the proper characteristics is also connected across the base-emitter input terminals to produce a first reference bias voltage to be applied to the input circuit of the transistor. The emitter-collector circuit of a compensating transistor is connected in series with the emitter-collector circuit of the amplifying transistor, and a second reference bias voltage is connected between the base of the compensating transistor and the emitter of the amplifying transistor. The second reference bias voltage is produced across a plurality of diodes having the proper characteristics, whereby the current gain of the amplifier will be constant regardless of variations in the transistor characteristics.

    摘要翻译: 一种信号放大电路,包括其基极 - 发射极端子连接到信号源的放大晶体管。 具有适当特性的二极管也连接在基极 - 发射极输入端上,以产生施加到晶体管的输入电路的第一基准偏置电压。 补偿晶体管的发射极 - 集电极电路与放大晶体管的发射极 - 集电极电路串联连接,第二基准偏置电压连接在补偿晶体管的基极和放大晶体管的发射极之间。 在具有适当特性的多个二极管上产生第二参考偏置电压,由此放大器的电流增益将恒定,而与晶体管特性的变化无关。

    Multipurpose semiconductor circuits utilizing a novel semiconductor
device
    9.
    发明授权
    Multipurpose semiconductor circuits utilizing a novel semiconductor device 失效
    利用新型半导体器件的多用途半导体电路

    公开(公告)号:US3988598A

    公开(公告)日:1976-10-26

    申请号:US561915

    申请日:1975-03-25

    摘要: A multipurpose semiconductor circuit of the balanced type comprising a pair of differential signal transmitting paths, each of which is formed by a first transistor supplied with an input signal, a second transistor connected in series to the first transistor and supplied with a constant bias or a control signal, a load with an output terminal connected to the second transistor, and a novel semiconductor device of the three-terminal type with first and third terminals connected to connection points between first and second transistors of both signal transmitting paths, respectively. A second terminal of the novel semiconductor device is supplied with a control signal or a constant bias. The input signal is controlled in accordance with the control signal supplied to the novel semiconductor device or the second transistor and derived from the output terminal. The novel semiconductor device has a semiconductor body similar to an ordinary transistor and acts as a bidirectionally conductive element with a superior symmetric characteristic.

    摘要翻译: 一种平衡型的多用途半导体电路,包括一对差分信号传输路径,每个差分信号传输路径由提供有输入信号的第一晶体管形成,第二晶体管与第一晶体管串联连接并提供恒定偏置或 控制信号,具有连接到第二晶体管的输出端子的负载,以及三端型的新型半导体器件,其中第一和第三端子分别连接到两个信号传输路径的第一和第二晶体管之间的连接点。 新型半导体器件的第二端子被提供有控制信号或恒定偏压。 根据提供给新颖的半导体器件或第二晶体管并从输出端导出的控制信号来控制输入信号。 新颖的半导体器件具有类似于普通晶体管的半导体本体,并且具有优异的对称特性的双向导电元件。