-
公开(公告)号：US3944901A
公开(公告)日：1976-03-16
申请号：US466221
申请日：1974-05-02
CPC分类号： H02P7/2885 , Y10S388/922
摘要： Circuit arrangement for stabilising the speed of a d.c. motor which is controlled via a control amplifier, and drives a tacho-meter which is connected between the bases of a "long-tailed pair," a tuned circuit being included between the collectors which is tuned to the tacho frequency and which attenuates the other frequencies, the voltage across the tuned circuit being applied to the control amplifier via a charge pump.
摘要翻译： 用于稳定直流速度的电路布置 电动机，其通过控制放大器控制，并且驱动连接在“长尾对”的基座之间的转速计，调谐电路被包括在被调谐到转速频率并且衰减另一个的收集器之间 频率，调谐电路两端的电压通过电荷泵施加到控制放大器。
-
2.发明授权Apparatus for reading a disc-shaped record carrier with plural scanning spots for stable radial tracking 失效用于读取具有多个用于稳定径向跟踪的扫描点的盘形记录载体的装置
公开(公告)号：US4037252A
公开(公告)日：1977-07-19
申请号：US623550
申请日：1975-10-17
CPC分类号： G11B7/0946 , G11B7/0903 , G11B7/0948
摘要： An apparatus for reading a disc-shaped record carrier on which information is stored in a preferably spiral-shaped track. Said information is read optically with the aid of a radiation beam, which via a directing system transfers the information contained in the scanning point of the record carrier to a read detector. The radial position of the scanning point is controlled with the aid of a control system which via a first pattern of radiation spots which is projected onto the record carrier receives information about said radial position and by means thereof controls the directing system. In order to ensure that the system is stable under all conditions use is made of a second pattern of radiation spots which are projected onto the record carrier, which pattern is radially shifted relative to the first pattern, and from which a control signal is derived with which the transfer function of the control system is varied so as to stabilize the control system.
摘要翻译： 一种用于读取其中信息被存储在优选螺旋形轨道中的盘形记录载体的装置。 所述信息借助于辐射束被光学读取，辐射束通过引导系统将包含在记录载体的扫描点中的信息传送到读取检测器。 借助于控制系统来控制扫描点的径向位置，该控制系统经由投射到记录载体上的辐射点的第一图案接收关于所述径向位置的信息并通过其控制引导系统。 为了确保系统在所有条件下都是稳定的，使用投射到记录载体上的第二辐射点图案，该图案相对于第一图案径向偏移，并且从该图案中导出控制信号 控制系统的传递功能发生变化，从而稳定控制系统。
-
3.发明授权Playback unit for a long-playing record of a time division multiplexed audio signal 失效用于时分复用音频信号的长时间播放记录的播放单元
公开(公告)号：US4022986A
公开(公告)日：1977-05-10
申请号：US464787
申请日：1974-04-29
IPC分类号： G11B23/36 , G11B7/00 , G11B7/004 , G11B7/005 , G11B20/00 , G11B20/10 , G11B20/12 , G11B21/08 , G11B23/00 , G11B27/10 , G11B27/30
CPC分类号： G11B20/10527 , G11B20/00007 , G11B20/00992 , G11B20/1251 , G11B21/085 , G11B23/0007 , G11B27/105 , G11B27/30 , G11B7/005
摘要： A system comprising a playback unit and an associated long-playing record on which sound information is recorded in a time division multiplex code on several tracks. Upon reproduction the same track is scanned n times with the aid of a beam of light before this beam of light is directed to the next track. With the aid of a sampling gate the pulses comprising the sound information in time division multiplex code and associated with a first sound channel are sampled with the aid of said sampling gate while during a second revolution pulses from a second sound channel etc. are sampled.In order to operate this sampling gate in synchronism with the scanning of said pulses the playback unit comprises first synchronizing means responding to pulses also comprising the sound information. Furthermore, at the commencement of each track, starting pulses are provided to which second synchronizing means respond. The output signals thereof control the first synchronizing means and a pivoting mirror reflecting the beam of light which after the record has made n revolutions with one and the same track being scanned is pivoted so that the beam of light is directed to the next track to be scanned. In another embodiment the pulses comprising the sound information are distributed in m groups of pulses 1 to n over a track and each group is preceded by a group pulse to which third synchronizing means respond. The output signals of these third synchronizing means control the first synchronizing means.
摘要翻译： 一种包括重放单元和相关联的长播记录的系统，在多个轨道上以时分复用码的形式在其上记录声音信息。 在再生之前，借助于光束，将相同的轨道扫描n次，然后该光束被引导到下一个轨道。 借助于采样门，借助于所述采样门对包括时分多路复用码中的声音信息和与第一声道相关联的脉冲进行采样，而在第二次旋转期间，来自第二声道等的脉冲被采样。
-
4.发明授权Integrating lens array and image forming method for improved optical efficiency 失效集成透镜阵列和成像方法，提高光学效率
公开(公告)号：US5662401A
公开(公告)日：1997-09-02
申请号：US571420
申请日：1995-12-13
CPC分类号： G02B3/0043 , G02B3/005 , H04N5/74 , G02B3/0025 , G02B3/0031
摘要： An illumination system and method for illuminating an output patch includes a first array for receiving light, and which includes first lenslets. A second array, which includes second lenslets, receives the light from the first array and outputs the light to the illumination patch. The first lenslets have a uniform shape and the second lenslets have a non-uniform shape thereby reducing optical extent and maximizing system lighting efficiency.
摘要翻译： 用于照亮输出贴片的照明系统和方法包括用于接收光的第一阵列，并且其包括第一小透镜。 包括第二小透镜的第二阵列接收来自第一阵列的光并将光输出到照明贴片。 第一小透镜具有均匀的形状，并且第二小透镜具有不均匀的形状，从而减小了光学范围并且使系统照明效率最大化。
-
5.发明授权Arrangement for aligning the image of an information structure on a converter 失效用于对准转换器上的信息结构的图像的布置
公开(公告)号：US3976828A
公开(公告)日：1976-08-24
申请号：US544854
申请日：1975-01-28
IPC分类号： H04N5/85 , G02B7/28 , G02B7/32 , G02B27/40 , G11B7/085 , G11B7/09 , G11C13/04 , H04N5/76 , G11B7/00
CPC分类号： G02B27/40 , G11B7/08511 , G11B2007/0924 , G11B7/0908
摘要： An arrangement for focussing an image of an information structure which is disposed on or in a substantially flat record carrier, light being projected onto the light-sensitive detector via an optical element and a record carrier, which detector via a control system controls the optical element, the control system also receiving a signal which is a measure of the velocity of movement, which signal limits said velocity of movement.
摘要翻译： 一种用于聚焦设置在基本上平坦的记录载体上或其中的信息结构的图像的布置，经由光学元件和记录载体投射到光敏检测器上的光，该检测器经由控制系统控制光学元件 ，控制系统还接收作为速度的测量的信号，该信号限制所述移动速度。
-
6.发明授权Tubular player arm for an optical recording and reproducing device with drive coil and tachogenerator coil on other end 失效用于具有驱动线圈和测速发电机线圈的光学记录和再现装置的管状播放器臂
公开(公告)号：US3969574A
公开(公告)日：1976-07-13
申请号：US464852
申请日：1974-04-29
IPC分类号： G11B21/08 , G11B7/085 , G11B7/09 , G11B7/12 , H02K41/035 , H02P25/02 , H04N5/76 , G11B17/00 , G11B21/10
CPC分类号： G11B7/12 , G11B7/08582 , G11B7/0929 , H02K41/0356 , H02P25/034
摘要： A device for writing information in a disk-shaped record carrier, and/or for reproducing the recorded information, the transducer being radially movable relative to the record carrier, which transducer is disposed on a tubular member, which at its one end is provided with a drive coil and at its other end with a tachometer coil, which coils are movable in an air gap of a stationary magnet system.
摘要翻译： 一种用于在盘形记录载体中写入信息和/或用于再现所记录的信息的装置，所述换能器可相对于记录载体径向移动，所述换能器设置在管状构件上，该管状构件的一端设置有 驱动线圈，其另一端具有转速计线圈，该线圈可在固定磁体系统的气隙中移动。
-
7.发明授权Digital driving of matrix display driver by conversion and capacitive charging 失效矩阵显示驱动器的数字驱动通过转换和电容充电
公开(公告)号：US5712634A
公开(公告)日：1998-01-27
申请号：US561961
申请日：1995-11-22
CPC分类号： G09G3/2011 , G09G3/3688 , G09G2310/027
摘要： A driver for a matrix display successively stores digital data codes. During a first time interval, the driver charges a capacitor coupled to its output to a voltage level represented by the most-significant bits of a stored data code. During a second time interval, the driver shifts the voltage on the capacitor by a magnitude represented by the least significant bits of the stored data code.
摘要翻译： 用于矩阵显示的驱动器依次存储数字数据代码。 在第一时间间隔期间，驱动器将耦合到其输出的电容器充电到由存储的数据代码的最高有效位表示的电压电平。 在第二时间间隔期间，驱动器将电容器上的电压移动由存储的数据代码的最低有效位所表示的幅度。
-
8.发明授权Color television recording system employing frequency modulation and pulse width modulation 失效采用频率调制和脉宽调制的彩色电视录音系统
公开(公告)号：US4045812A
公开(公告)日：1977-08-30
申请号：US642293
申请日：1975-12-19
申请人： Leonardus Adrianus Johannes Verhoeven , Maarten Rutger De Haan , Peter Johannes Michiel Janssen
发明人： Leonardus Adrianus Johannes Verhoeven , Maarten Rutger De Haan , Peter Johannes Michiel Janssen
CPC分类号： H04N9/86
摘要： A color television system for transmitting a color television signal, specifically for recording on and subsequently reproducing from a record carrier. The color television signal to be transmitted contains a first carrier which is frequency-modulated with the luminance information and a second carrier which is modulated with the chrominance information, whose frequency lies between zero and the first-order lower side band of the modulated first carrier which corresponds to the highest modulation frequency. Said second carrier does not have a fixed frequency, but is locked to the instantaneous frequency of the modulated first carrier by a constant integral ratio. Depending on the characteristics of the transmission medium and the signal processing equipment said ratio is preferably two or three.
-
9.发明授权
公开(公告)号：US4005260A
公开(公告)日：1977-01-25
申请号：US587636
申请日：1975-06-17
CPC分类号： G05D3/14 , G11B7/081 , G11B7/0953 , H04N5/7605
摘要： Device for reading-out a disk-shaped record carrier. To compensate for time-base errors of the detected signal caused by eccentricity or out-of-roundness of the record carrier, a tangential tracking system is provided with which the tangential position of the scanning point on the record carrier can be controlled. A control signal for this tangential tracking system is obtained by extracting the line synchronizing signal from the detected video signal. By ensuring through the use of a filter element that the overall transfer function of the control system exhibits a band-pass characteristic about the frequency which corresponds to the speed of the record carrier, a suitable tangential tracking is ensured.
摘要翻译： 用于读出盘形记录载体的装置。 为了补偿由记录载体的偏心或不圆度引起的检测信号的时基误差，提供了切向跟踪系统，可以控制记录载体上的扫描点的切向位置。 通过从检测到的视频信号中提取行同步信号，获得用于该切向跟踪系统的控制信号。 通过使用滤波器元件，控制系统的整体传递函数表现出关于对应于记录载体的速度的频率的带通特性，确保了适当的切向跟踪。
-
10.发明授权
公开(公告)号：US3982272A
公开(公告)日：1976-09-21
申请号：US466626
申请日：1974-05-03
申请人： Leonardus Adrianus Johannes Verhoeven , Maarten Rutger DE Haan , Peter Johannes Michiel Janssen
发明人： Leonardus Adrianus Johannes Verhoeven , Maarten Rutger DE Haan , Peter Johannes Michiel Janssen
CPC分类号： H04N9/86
摘要： A color television system for transmitting a color television signal, specifically for recording on and subsequently reproducing from a record carrier. The color television signal to be transmitted contains a first carrier which is frequency-modulated with the luminance information and a second carrier which is modulated with the chrominance information, whose frequency lies between zero and the first-order lower side band of the modulated first carrier which corresponds to the highest modulation frequency. Said second carrier does not have a fixed frequency, but is locked to the instantaneous frequency of the modulated first carrier by a constant integral ratio. Depending on the characteristics of the transmission medium and the signal processing equipment said ratio is preferably two or three.
摘要翻译： 一种用于发送彩色电视信号的彩色电视系统，专门用于在记录载体上记录和随后再现。 要传输的彩色电视信号包含用亮度信息进行频率调制的第一载波和用色度信息进行调制的第二载波，频率位于调制的第一载波的零级和低级边带之间 其对应于最高调制频率。 所述第二载波不具有固定频率，而是通过恒定的积分比锁定到调制的第一载波的瞬时频率。 根据传输介质和信号处理设备的特性，所述比例优选为两或三。
-
-
-
-
-
-
-
-
-
搜索结果
11 条记录 (耗时 0.016 秒)