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    • 52. 发明申请
    • A VIDEO OUTPUT AMPLIFIER
    • 视频输出放大器
    • WO0025420A3
    • 2000-07-27
    • PCT/DK9900579
    • 1999-10-22
    • BANG & OLUFSEN ASJENSEN ERIK ALBERT
    • JENSEN ERIK ALBERT
    • H03F3/19H03F3/30H04N5/14H04N9/64
    • H03F3/3067H03F3/19H04N5/148H04N9/648
    • Output amplifiers for driving picture tubes need to provide a high slew rate, and traditional class-A amplifiers have a high quiescent power consumption because of the high supply voltage combined with the necessary high quiescent current. According to the invention, the quiescent current is constituted mainly of the DC feedback current in the output device (TR3), and its control electrode is driven by means of a transistor (TR1), whose base has a reference potential, and whose emitter receives the static component of the control signal for the picture tube. In one embodiment the quiescent power consumption is 10-15 % of that of a corresponding class-A amplifier, and the required cooling means may be considerably reduced.
    • 用于驱动显像管的输出放大器需要提供高转换速率,而传统的A类放大器由于高电源电压和必要的高静态电流而具有高静态功耗。 根据本发明,静态电流主要由输出器件(TR3)中的DC反馈电流构成,并且其控制电极由晶体管(TR1)驱动,晶体管(TR1)的基极具有参考电势,并且其发射极接收 显像管控制信号的静态分量。 在一个实施例中,静态功耗是对应的A类放大器的10-15%,并且所需的冷却装置可以显着减少。
    • 53. 发明申请
    • DISPLAY DRIVER APPARATUS
    • 显示驱动器
    • WO1999031876A1
    • 1999-06-24
    • PCT/US1997022765
    • 1997-12-12
    • THOMSON CONSUMER ELECTRONICS, INC.WHITE, Charles, MichaelLAGONI, William, Adamson
    • THOMSON CONSUMER ELECTRONICS, INC.
    • H04N05/14
    • H03G11/02H03F3/19H04N5/148
    • An emitter follower amplifier is coupled between the output of a high voltage video amplifier and the cathode of a kinescope for reducing the effective capacitance presented to the video amplifier that is attributable to the kinescope cathode, socket, spark gaps, and related stray capacitances. A secondary undesired capacitance loading of the video amplifier is effectively reduced by regulating the collector-emitter voltages of the emitter follower output transistors at substantially constant values thereby improving parameters such as slew rate and bandwidth of the overall video display system. Nonlinear circuitry in the follower circuit facilitates accurate AKB current sensing and provides simplification of the voltage regulation circuitry. White limiting circuitry is included within the video amplifier for reducing excess peak white drive that results in objectionable smears. Black limiting circuitry within the video amplifier is also provided to prevent the collapse of the collector-emitter voltage of the push-pull follower output transistor. The heat sink capacitance of the video amplifier output transistor is screened out via bootstrapping.
    • 射极跟随器放大器耦合在高电压视频放大器的输出端和显象管的阴极之间,用于降低归因于显象管阴极,插座,火花间隙和相关杂散电容的视频放大器的有效电容。 通过以射极跟随器输出晶体管的集电极 - 发射极电压为基本恒定的值来有效地减小视频放大器的次要不需要的电容负载,从而改善整个视频显示系统的转换速率和带宽等参数。 跟随器电路中的非线性电路有助于精确的AKB电流检测,并提供电压调节电路的简化。 视频放大器中包含白色限制电路,用于减少过多的峰值白色驱动器,导致令人反感的涂片。 还提供视频放大器内的黑色限制电路以防止推挽跟随器输出晶体管的集电极 - 发射极电压的崩溃。 视频放大器输出晶体管的散热电容通过自举进行屏蔽。
    • 54. 发明申请
    • ビデオ信号処理回路、およびそれを搭載した電子機器
    • 具有这样的视频信号处理电路的视频信号处理电路和电子设备
    • WO2007000997A1
    • 2007-01-04
    • PCT/JP2006/312805
    • 2006-06-27
    • ローム株式会社高間 欣也
    • 高間 欣也
    • H04N5/14H04N5/63
    • H04N5/148
    •  ビデオ増幅回路10は、ビデオ信号に所定の利得で増幅する。チャージポンプ回路30は、ビデオ増幅回路10にそれぞれ異なる複数の電源電圧を供給するため、所定の固定電圧から別の電圧を生成する。発振回路20は、チャージポンプ回路30に動作クロックを供給する。ビデオ増幅回路10には、チャージポンプ回路30の動作クロックに起因するノイズが混入される。発振回路20は、ビデオ増幅回路10により処理されたビデオ信号から生成される画像中に発生する画像ノイズによる品質低下を視覚的に軽減するよう、動作クロックの周波数を設定する。
    • 视频放大电路(10)以规定的增益放大视频信号。 电荷泵电路(30)从规定的固定电压产生不同的电压,分别向视频放大电路(10)供给多个不同的电源电压。 振荡电路(20)向电荷泵电路(30)供给操作时钟。 由电荷泵(30)的操作时钟引起的噪声在视频放大电路(10)中混合。 振荡电路(20)将操作时钟的频率设置为视觉上减少由由视频放大电路(10)处理的视频信号产生的图像中的图像噪声引起的质量劣化。
    • 56. 发明申请
    • BOOSTER AND SYSTEM USING THE SAME
    • 使用它的增压器和系统
    • WO99049653A1
    • 1999-09-30
    • PCT/JP1998/001229
    • 1998-03-23
    • H04N5/14
    • H04N5/148
    • A booster which can form a relatively large output current with a highly linear input-output transmitting characteristic is constituted of an input circuit which is composed of a bipolar transistor and drives a CMOS output circuit composed of a P-channel MOSFET and an N-channel MOSFET, and a negative feedback circuit which feeds back the output signal of the CMOS output circuit to the input circuit and is made to negatively feed back output signal for amplifying operations so that output signals can be obtained from the CMOS output circuit.
    • 可以形成具有高线性输入 - 输出传输特性的较大输出电流的升压器由由双极晶体管组成的输入电路构成,并驱动由P沟道MOSFET和N沟道组成的CMOS输出电路 MOSFET和负反馈电路,其将CMOS输出电路的输出信号反馈到输入电路,并且使负反馈输出信号进行放大操作,使得可以从CMOS输出电路获得输出信号。
    • 59. 发明申请
    • A VIDEO OUTPUT AMPLIFIER
    • 视频输出放大器
    • WO00025420A2
    • 2000-05-04
    • PCT/DK1999/000579
    • 1999-10-22
    • H03F3/19H03F3/30H04N5/14H04N9/64H03F
    • H03F3/3067H03F3/19H04N5/148H04N9/648
    • Output amplifiers for driving picture tubes need to provide a high slew rate, and traditional class-A amplifiers have a high quiescent power consumption because of the high supply voltage combined with the necessary high quiescent current. According to the invention, the quiescent current is constituted mainly of the DC feedback current in the output device (TR3), and its control electrode is driven by means of a transistor (TR1), whose base has a reference potential, and whose emitter receives the static component of the control signal for the picture tube. In one embodiment the quiescent power consumption is 10-15 % of that of a corresponding class-A amplifier, and the required cooling means may be considerably reduced.
    • 用于驱动显像管的输出放大器需要提供高转换速率,传统的A类放大器具有高静态功耗,因为高电源电压与必要的高静态电流相结合。 根据本发明,静态电流主要由输出装置(TR3)中的直流反馈电流构成,其控制电极由基极具有参考电位的晶体管(TR1)驱动,其发射极接收 显像管的控制信号的静态分量。 在一个实施例中,静态功耗是对应的A类放大器的10-15%,并且所需的冷却装置可以大大减少。