专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

71. 发明授权

US4521736A Demodulator for pulse width modulated signals 失效
标题翻译：用于脉宽调制信号的解调器
公开(公告)号：US4521736A
公开(公告)日：1985-06-04
申请号：US37554
申请日：1979-05-09
申请人： John O. Ryan
发明人： John O. Ryan
IPC分类号： H03K9/08 , H03D1/18
CPC分类号： H03K9/08
摘要： A simple demodulator circuit for demodulating high frequency pulse width modulated carrier signals, includes means for charging a capacitor to charge levels commensurate with the pulse widths. Output switch means, biased at the verge of conduction, discharge the capacitor charge at the ends of the pulses as an exponential signal with given time constant. Since the amplitudes of successive exponential signals are proportional to the respective capacitor charge levels, the charge levels are simultaneously read during the discharge process, thereby allowing demodulation at very high speeds.
摘要翻译：用于解调高频脉宽调制载波信号的简单解调器电路包括用于对电容器充电以对与脉冲宽度相当的电荷进行充电的装置。在传导边缘偏置的输出开关装置，以给定的时间常数作为指数信号将脉冲端的电容器电荷放电。由于连续指数信号的幅度与各自的电容器电荷电平成比例，因此在放电过程中同时读取充电电平，从而允许以非常高的速度进行解调。

72. 发明授权

US4331980A Circuit and method for automatically setting the beam currents in a video camera 失效
标题翻译：在摄像机中自动设置光束电流的电路和方法
公开(公告)号：US4331980A
公开(公告)日：1982-05-25
申请号：US185097
申请日：1980-09-08
申请人： John O. Ryan
发明人： John O. Ryan
IPC分类号： H04N5/228 , H04N5/243 , H04N5/34
CPC分类号： H04N5/2283
摘要： The conventional vertical drive sawtooth is modified, during the camera setup mode, to halve the slope thereof for a given field time interval, or intervals, and to double the slope for the remaining field time interval. It follows that the speed of vertical scan is halved and doubled respectively, in the corresponding field time intervals. In the interval of double scan speed, blooming occurs and twice the usual beam current is required to successfully discharge the picture. Thus when the beam set circuit is in operation as during the setup mode, the beam current is increased until the blooming existing in the double scan speed interval just subsides. The beam current has then been set at 200% of typical beam level.
摘要翻译：传统的垂直驱动锯齿在相机设置模式期间被修改，以便在给定的场时间间隔或间隔中使其斜率减半，并且对于剩余的场时间间隔将斜率加倍。因此，垂直扫描的速度在相应的场时间间隔内分别减半和加倍。在双扫描速度的间隔中，出现发光，并且需要两倍的光束电流来成功放电图像。因此，当束设置电路在设置模式期间操作时，波束电流增加，直到存在于双扫描速度间隔中的闪光仅仅消除。光束电流然后被设置为典型光束电平的200％。

73. 发明授权

US4312014A Input video processor for color television cameras 失效
标题翻译：输入彩色电视摄像机的视频处理器
公开(公告)号：US4312014A
公开(公告)日：1982-01-19
申请号：US139508
申请日：1980-04-11
申请人： John O. Ryan
发明人： John O. Ryan
IPC分类号： H04N9/64 , H04N9/09 , H04N9/68 , H04N9/535
CPC分类号： H04N9/09
摘要： An input video processor utilizes the characteristics of a modulator having two differential pairs of transistors with respective gain control terminals, in combination with a switch. The processor performs four distinct functions utilizing the same basic modulator; it provides blanking the video signal from the preamplifier to provide a clean pulse for clamping at a later stage; it clamps the output during black level firmly to ground potential to allow subsequent blanking; it allows the manipulation of the master gain of the three channels in a color television while independently adjusting the gain of the channels, while further maintaining absolute tracking between channels; and it provides an independent gain control input for a white shading control voltage input to perform white shading corrections.
摘要翻译：输入视频处理器利用具有两个具有相应增益控制端子的差分对晶体管的调制器的特性，与开关组合。处理器利用相同的基本调制器执行四个不同的功能; 它提供了来自前置放大器的视频信号的消隐，以便在稍后阶段提供用于钳位的清洁脉冲; 它在黑电平下将输出钳位到地电位以允许随后的消隐; 它允许在彩色电视机中操纵三个通道的主增益，同时独立地调整通道的增益，同时进一步保持通道之间的绝对跟踪; 并为白色阴影控制电压输入提供独立的增益控制输入，以执行白色阴影校正。

74. 发明授权

US4249202A Circuit for frequency selective coring of a video signal 失效
标题翻译：用于视频信号的频率选择性取芯的电路
公开(公告)号：US4249202A
公开(公告)日：1981-02-03
申请号：US37345
申请日：1979-05-09
申请人： Vinson R. Perry , John O. Ryan
发明人： Vinson R. Perry , John O. Ryan
IPC分类号： H04N5/21 , H04N5/14
CPC分类号： H04N5/21
摘要： A coring circuit located prior to the aperture corrector circuit provides fast acting, remotely controlled, temperature compensated, frequency selective coring of the video signal. The wideband video signal is separated into its low frequency and high frequency components. The high frequency component is transformer coupled to a coring means proper which cores out the corresponding high frequency noise. The cored high frequency component then is recombined with the low frequency component to reconstitute the cored composite video signal for subsequent application to the aperture correction circuit.
摘要翻译：位于孔径校正器电路之前的取芯电路提供视频信号的快速作用，远程控制的温度补偿的频率选择性取芯。宽带视频信号被分为低频和高频分量。高频分量是变压器耦合到一个取芯装置，它将核心相应的高频噪声。然后将核心高频分量与低频分量重新组合以重构核心复合视频信号，以便后续应用于孔径校正电路。

75. 发明授权

US4229830A Apparatus and method for providing a modulation format for multiple wideband signal transmission 失效
标题翻译：用于提供用于多个宽带信号传输的调制格式的装置和方法
公开(公告)号：US4229830A
公开(公告)日：1980-10-21
申请号：US44730
申请日：1979-06-01
申请人： John O. Ryan
发明人： John O. Ryan
IPC分类号： H03K7/08 , H04B10/00 , H04B10/02 , H04B10/18 , H04B10/22 , H04J3/16 , H04J7/00 , H04N7/22 , H04N11/06 , H04N11/24 , H04B9/00
CPC分类号： H04N7/22 , H04J3/1676 , H04J7/00
摘要： A modulation format for containing, for simultaneously transmitting via a single optical fiber, and for decoding, multiple independent wideband signals. The format derives maximum advantage from the inherent wideband properties of the optical fiber, while utilizing the concept that the signal-to-noise ratio of one channel (e.g., in a red, green, and blue color video signal) is preferably made substantially greater than that for the other two channels. This allows optimizing the signal-to-noise ratio of the signal channels while using a relatively simplified circuit implementation. To this end, the format waveform employs a stationary reference edge and multiple time-variable edges, wherein the time interval between the reference edge and the following time-variable edge of the same polarity always exceeds, or always is less than, one-half of the total available time period of the waveform. That is, the next time-variable edge of the same polarity as the stationary reference edge never crosses the half-way point of the total time period of the waveform in the course of being deviated. The above conditions allow a relatively simplified edge discrimination scheme and demultiplexing circuit.
摘要翻译：一种调制格式，用于同时传输单个光纤并用于解码多个独立的宽带信号。该格式从光纤的固有宽带属性中获得最大的优势，同时利用一个通道（例如，在红色，绿色和蓝色视频信号中）的信噪比优选地被做得更大的概念比其他两个渠道。这允许在使用相对简化的电路实现的同时优化信号通道的信噪比。为此，格式波形采用稳定的参考边缘和多个时间可变边缘，其中相同极性的参考边缘和随后的时间可变边缘之间的时间间隔总是超过或总是小于一半的波形的总可用时间段。也就是说，下一个与静止参考边缘相同极性的时间变化边缘从未在偏离的过程中与波形的总时间周期的中途点相交。上述条件允许相对简化的边缘识别方案和解复用电路。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式