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公开(公告)号：EP0519465B1
公开(公告)日：1998-04-29
申请号：EP92110300.8
申请日：1992-06-17
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63.发明授权Gerät zum Verarbeiten von in Zeilen aufgeteilten Videosignalen mit einer digitalen Synchronabtrennstufe 失效一种用于在视频信号的分割线的处理与数字同步分离器
公开(公告)号：EP0533997B1
公开(公告)日：1996-03-20
申请号：EP91116607.2
申请日：1991-09-27
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公开(公告)号：EP0491186B1
公开(公告)日：1996-03-20
申请号：EP91120085.5
申请日：1991-11-25
申请人： MOTOROLA, INC.
发明人： Gay, Michael John
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公开(公告)号：EP0700200A2
公开(公告)日：1996-03-06
申请号：EP95304905.3
申请日：1995-07-13
IPC分类号： H04N5/18
CPC分类号： H04N5/18
摘要： In a video sync tip clamp circuit having a section (A) defining an input voltage and a section (B) defining a reference voltage there is provided a feedback section (C) interconnecting the input and reference sections and operating to maintain the input voltage at substantially the same level as the reference voltage.
摘要翻译： 在具有限定输入电压的部分（A）和限定参考电压的部分（B）的视频同步尖端钳位电路中，提供了一个反馈部分（C），其将输入部分和参考部分互连，并且操作以将输入电压维持在 基本上与参考电压相同。
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公开(公告)号：EP0609759A3
公开(公告)日：1995-09-20
申请号：EP94101102.5
申请日：1994-01-26
摘要： A video signal clamp involves evaluating (310) the difference between the signal level (VIDEO_IN) and the desired clamp level (CLAMP LEVEL) during the back porch interval. A correction signal (CHARGE_x) indicates whether the signal level must be increased or decreased to establish the desired clamp level. Generation of the correction signal involves a median filter algorithm (330-350). Any required increase or decrease of the signal level occurs continuously throughout each horizontal line interval.
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67.发明授权Automatic or semi-automatic signal level adjustment for a photographic picture to television signal converter 失效自动或半自动的信号电平调整为在该电视信号的胶片图像转换的装置。
公开(公告)号：EP0400717B1
公开(公告)日：1995-08-02
申请号：EP90201286.3
申请日：1990-05-22
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公开(公告)号：EP0519465A3
公开(公告)日：1994-08-17
申请号：EP92110300.8
申请日：1992-06-17
摘要： The present invention relates to a satellite television broadcasting receiver which receives waves from a satellite, selects a broadcasting office and obtains an FM demodulated video signal by passing a selected signal through the band-pass filter (6). In this satellite television broadcasting receiver, the video signal superposed with a large energy dispersion signal is inputted to the first clamping circuit (8) at a low level, to eliminate the energy dispersion signal. Thus, a room is provided in the dynamic range of the amplifier (9) at the later stage and the DG and DP of the amplifier (11) at the later stage are maintained at a satisfactory level by the second clamping circuit (10). As a result, even in the case of a satellite television broadcasting in which the level of the energy dispersion signal superposed on the video signal is large, distortion which occurs due to the nonlinearity of the amplifier can be reduced substantially so that the image can be reproduced on the screen in a satisfactory condition without an interference of flickering.
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69.发明公开Multi-input television receiver with combined clamping and sync separation 失效一种电视接收机，包括多个输入端和组合的夹紧和去除同步信号的。
公开(公告)号：EP0588170A1
公开(公告)日：1994-03-23
申请号：EP93114058.6
申请日：1993-09-02
摘要： A television receiver embodying the invention includes a plurality of luminance signal sources (Y1,Y2), each capacitively coupled (C1,C2) to an input of a luminance signal selection switch (40) and each capacitor being coupled to a respective clamp circuit (42,44) with each clamp circuit having a reference voltage input coupled to a common reference voltage source (50). A sync separator (54) is provided having a first input coupled to receive the output of luminance signal selection switch and a second input coupled to a source of reference potential (51) derived from said reference voltage source. Advantageously, the overall number of clamp circuits is minimized by merging the sync separator circuit with the input signal selection clamping circuit.
摘要翻译： 一种电视接收机，体现本发明包括的亮度信号源（Y1，Y2）多个，每个电容性耦合（C1，C2），以在亮度信号选择开关（40）和各电容器的输入端连接到一个respectivement钳位电路（ 42,44）具有耦合至公共参考电压源（50），一个参考电压输入各钳位电路。 甲同步分离器（54）提供了一种具有从所述参考电压源导出耦合以接收亮度信号选择开关的输出以及耦合到基准电位（51）的源极的第二输入端的第一输入。 有利地，钳位电路的总数通过合并与输入信号选择钳位电路的同步信号分离器电路最小化。
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公开(公告)号：EP0535742A3
公开(公告)日：1993-06-16
申请号：EP92202958.2
申请日：1992-09-25
IPC分类号： H04N5/18
CPC分类号： H04N5/18
摘要： A signal source (SV) applies a signal having a fixed low frequency modulation added thereto through a capacitor (CS) to a line (L) to which is connected a first clamping means comprising a first voltage controlled current amplifier or transconductor (A1), a second input of which receives a reference voltage (VR1). The transconductor (A1) output is applied through a first switch means (S1) to the line (L) which switch means (S1) is periodically closed during a defined clamp period in the signal. A filter (BP) is also connected to the line (L) having a pass band centred on the frequency of the modulation which periodically samples the signal during the clamp period. The filter (BP) output is applied to a second transconductor (A2) having a transconductance greater than that of the first transconductor (A1) a second input of which receives a second reference voltage (VR2). The output of the second transconductance (A2) is applied through second switch means (S2) to the line L periodically closed during a defined period in said signal other than the clamp signal.
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