专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US3910681A Liquid crystal display devices 失效
标题翻译：液晶显示装置
公开(公告)号：US3910681A
公开(公告)日：1975-10-07
申请号：US43258374
申请日：1974-01-11
申请人： MARCONI CO LTD
发明人： ELLIOTT GEORGE , ELY BRIAN WILLIAM
IPC分类号： G02F1/1335 , G02F1/13
CPC分类号： G02F1/133553 , G02F1/1335
摘要： A liquid crystal display arrangement is described in which the liquid crystal cell includes a reflective mirror in the form of a number of layers of dielectric material, the refractive indices and thicknesses of the various layers being chosen to allow reflection of light scattered from the liquid crystal material at large angles to the normal whilst light from external light sources incident normally on the cell is not reflected thereby improving the contrast of the display.
摘要翻译：描述了一种液晶显示装置，其中液晶单元包括多层电介质材料形式的反射镜，各层的折射率和厚度被选择为允许反射从液晶散射的光材料以与正常大的角度相反，而来自外部光源的正常入射在单元上的光不被反射，从而改善了显示器的对比度。

2. 发明授权

US3902119A Diverse signal combining arrangements 失效
标题翻译：多元信号组合安排
公开(公告)号：US3902119A
公开(公告)日：1975-08-26
申请号：US45507674
申请日：1974-03-27
申请人： MARCONI CO LTD
发明人： SKINGLEY BRIAN STANLEY
IPC分类号： H03D7/12 , H04B7/08
CPC分类号： H03D7/12 , H04B7/0837
摘要： A diversity combining arrangement is provided with a signal handling arrangement for each channel with each arrangement including two balanced mixers fed with input signals in parallel a second input for one mixer being obtained through a side band filter from the other mixer and the output from the one mixer being passed through a further filter as an output signal for combining with other channels and as a second input for the other mixer and in which the contribution to the combined signal provided by each channel is controlled in dependence upon the degree of intermodulation present in that channel.

3. 发明授权

US3891994A Colour television 失效
标题翻译：彩色电视机
公开(公告)号：US3891994A
公开(公告)日：1975-06-24
申请号：US39641273
申请日：1973-09-12
申请人： MARCONI CO LTD
发明人： PHILLIPS GEOFFREY JOHN , CHAMBERS JOHN PHILIP
IPC分类号： H04N9/04 , H04N11/04 , H04N11/20 , H04N9/38
CPC分类号： H04N11/20 , H04N9/045 , H04N11/042 , H04N11/046
摘要： PAL colour television signals are sampled at a sampling rate which bears a ratio of small integers, e.g. 3, 5/2, to the colour subcarrier frequency, the sampling instants being maintained at points symmetrically disposed in time about the maxima and minima of the U-component of the signal. A previous sample in such a signal or a combination of such samples can be used as a reference in differential coding or a prediction for error concealment overcoming complications caused by the V-axis phase reversal on alternate lines. Similar principles can be applied to conversion between PAL and N.T.S.C. signals.
摘要翻译： PAL彩色电视信号采样率为小，整数比例为 3，5/2，对于彩色副载波频率，采样时刻保持在关于信号的U分量的最大值和最小值的时间上对称地设置的点处。这种信号中的先前样本或这些样本的组合可以用作差分编码中的参考或用于克服由交替线上的V轴相位反转引起的并发症的误差隐藏的预测。类似的原理可以应用于PAL和N.T.S.C.之间的转换。信号。

4. 发明授权

US3887911A Digital-to-analogue converter for rapidly converting different codes 失效
标题翻译：数模转换器用于快速转换不同的代码
公开(公告)号：US3887911A
公开(公告)日：1975-06-03
申请号：US33254873
申请日：1973-02-15
申请人： MARCONI CO LTD
发明人： BELL PHILIP RICHARD
IPC分类号： H03K17/60 , H03M1/00 , H03K13/02
CPC分类号： H03K17/603 , H03M1/74
摘要： A digital-to-analogue converter of the kind which provides a segmented digital-to-analogue transfer characteristic is capable of converting a digital signal to its corresponding analogue signal more quickly than known comparable converters. A linearly increasing signal is arranged to increase constantly at a rate corresponding to the slope of that portion of the segmented transfer characteristic on which the desired analogue value lies.
摘要翻译：提供分段的数模转换特性的数/模转换器能够比已知的可比变换器更快地将数字信号转换成其对应的模拟信号。线性增加信号被布置成以对应于期望模拟值所在的分段传送特性的该部分的斜率的速率恒定地增加。

5. 发明授权

US3859601A Signal handling arrangement and frequency diversity combining arrangements utilising the same 失效
标题翻译：信号处理装置和频率分布组合使用安排
公开(公告)号：US3859601A
公开(公告)日：1975-01-07
申请号：US35009473
申请日：1973-04-11
申请人： MARCONI CO LTD
发明人： CURTIS ANTHONY THOMAS
IPC分类号： H04B7/12 , H04B7/02
CPC分类号： H04B7/12
摘要： A signal handling arrangement for use in a diversity predetection combining arrangement in which input signals are fed in parallel to two balanced mixers. The output from one mixer feeds a second input of the other mixer through a band pass filter which passes one sideband and the output from the second mixer feeds a second input of the first mixer through a filter capable of tracking in response to the frequency of the input signals applied to it so as to maintain passage of signals in the sideband of the output from the second mixer which corresponds to the sideband passed by the first filter thereby alleviating problems due to phase shifting between outputs from two identical frequency diverse arrangements.
摘要翻译：一种用于分集预选组合装置中的信号处理装置，其中输入信号并行馈送到两个平衡混频器。来自一个混合器的输出通过带通滤波器馈送另一个混频器的第二输入端，该带通滤波器通过一个边带，并且来自第二混频器的输出端通过能够响应于第一混频器的频率进行跟踪的滤波器馈送第一混频器的第二输入端施加到其上的输入信号以保持来自第二混频器的输出的边带中的信号的通过，该第二混频器对应于由第一滤波器通过的边带，从而减轻由于两个相同的频率不同布置的输出之间的相移而引起的问题。

6. 发明授权

US3857115A Semiconductor device mounting arrangements 失效
标题翻译：半导体器件安装布置
公开(公告)号：US3857115A
公开(公告)日：1974-12-24
申请号：US25767972
申请日：1972-05-30
申请人： MARCONI CO LTD
发明人： WISBEY P
IPC分类号： H01P1/00 , H01P3/00
CPC分类号： H01P1/00
摘要： An arrangement for mounting a semiconductor device in a waveguide run consists of a conducting block having an aperture between two of its faces, in which the device to be mounted is positioned. On one face of the block is provided a strip-line which extends towards the aperture and with which one terminal of the semiconductor device makes contact, the other terminal of the semiconductor making contact with the conducting surface of the block. The block is usually made from insulating material which is coated with and adherent metallic film the strip-line being defined by a photolithographic process.

7. 发明授权

US3851282A Waveguide filters 失效
标题翻译：波形滤波器
公开(公告)号：US3851282A
公开(公告)日：1974-11-26
申请号：US41250473
申请日：1973-11-02
申请人： MARCONI CO LTD
发明人： WATSON B
IPC分类号： H01P1/207 , H01P5/12 , H01P1/20
CPC分类号： H01P1/207
摘要： A microwave reflection filter having two waveguide channels each with a narrowing taper between the input and output ports down to dimensions which correspond with a predetermined upper cut-off frequency. The input taper of the first channel has the same dimensions as the output taper of the second channel and the input taper of the second channel is dimensioned so that the distance from the input port to the point of cut-off for any frequency in the reflected band is lambda /4 greater than the distance from the input port of the first channel to the corresponding cut-off point in the first channel.
摘要翻译：一种具有两个波导通道的微波反射滤波器，每个波导通道在输入和输出端口之间具有窄的锥形，其尺寸与预定的上限截止频率相对应。第一通道的输入锥度具有与第二通道的输出锥度相同的尺寸，并且第二通道的输入锥度的尺寸设定为使得从反射的任何频率到输入端口到截止点的距离频带是比从第一通道的输入端口到第一通道中对应的截止点的距离大的λ/ 4。

8. 发明授权

US3825930A Radar provided with pulse repetition frequency discrimination 失效
标题翻译：雷达提供脉冲重复频率辨别
公开(公告)号：US3825930A
公开(公告)日：1974-07-23
申请号：US31716172
申请日：1972-12-21
申请人： MARCONI CO LTD
发明人： DAVIES E
IPC分类号： G01S7/292 , G01S9/42
CPC分类号： G01S7/2926
摘要： In order to reduce the effect of jamming pulses or spurious noise on the operation of a radar, incoming signals are attenuated to below a threshold level. Only those pulses which on integration over a number of pulse repetition periods exceed the threshold level are utilised. Additional information concerning a radar target is obtained from the degree of alternation to which each incoming signal is subjected in order to bring it below the threshold level.
摘要翻译：为了减少干扰脉冲或杂散噪声对雷达操作的影响，输入信号衰减到阈值以下。仅利用在多个脉冲重复周期上积分的脉冲超过阈值水平的那些脉冲。关于雷达目标的附加信息是从每个输入信号所经历的交替程度获得的，以使其低于阈值水平。

9. 发明授权

US3800225A Differential pulse-code modulation 失效
标题翻译：差分脉冲编码调制
公开(公告)号：US3800225A
公开(公告)日：1974-03-26
申请号：US29040872
申请日：1972-09-19
申请人： MARCONI CO LTD , STANDARD TELEPHONES CABLES LTD
发明人： MEARES D
IPC分类号： H03M3/04 , H04N11/04 , H03K5/08 , H04B1/00
CPC分类号： H03M7/3044 , H04N11/046
摘要： An input signal which includes a high-frequency component of frequency f, such as a colour television signal having a colour subcarrier, is encoded by sampling the signal at a sampling frequency of Nf where N is a small integral ratio, typically 3, taking the difference between samples which are N samples apart, and encoding this difference with a non-linear quantizing scale. Preferably the sampling takes place as an initial step and thereafter the signals are processed digitally.
摘要翻译：包括频率f的高频分量的输入信号，例如具有彩色副载波的彩色电视信号，通过以N为小的整数比（通常为3）的采样频率Nf进行采样来编码。 N个采样间隔的样本之间的差异，并用非线性量化标度对该差异进行编码。优选地，采样作为初始步骤发生，此后信号被数字地处理。

10. 发明授权

US3794926A Diversity combining arrangements 失效
标题翻译：多元组合安排
公开(公告)号：US3794926A
公开(公告)日：1974-02-26
申请号：US3794926D
申请日：1972-11-06
申请人： MARCONI CO LTD
发明人： SKINGLEY B , CURTIS A
IPC分类号： H04B7/02 , H03K17/02
CPC分类号： H04B7/02
摘要： A diversity combining arrangement for combining signals on at least two paths, each path comprising, a muting circuit and means for detecting a pilot frequency signal on the path, control means being provided, responsive to a loss of pilot frequency on the path for rendering the associated muted circuit operative, the control means for each path being interdependent such that upon a loss of pilot frequency on more than one path all of the control means are inhibited from rendering the muting circuits operative.
摘要翻译：一种用于组合至少两条路径上的信号的分集组合装置，每条路径包括一静音电路和用于检测该路径上的导频信号的装置，响应该路径上的导频频率的损失，相关联的静音电路可操作，每个路径的控制装置是相互依赖的，使得在多于一条路径上的导频失去时，禁止所有控制装置使静音电路可操作。

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