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公开(公告)号：US4322664A
公开(公告)日：1982-03-30
申请号：US184718
申请日：1980-09-08
申请人： Stan Bart , George J. Tzakis
发明人： Stan Bart , George J. Tzakis
摘要： A ramp generator is described for developing a ramp voltage for use in vertically deflecting the electron beam or beams of a television receiver. The ramp generator receives a vertical rate pulse developed by the receiver for developing a charging current during the occurrence of the vertical rate pulse. A discharging current is also generated, and both currents are applied to a capacitor for developing a ramp voltage which increases and then decreases in amplitude. A clamp circuit in the generator is enabled when the vertical pulse is received for clamping the ramp voltage on the capacitor to a predetermined peak voltage via low impedance path such that unwanted voltage components are substantially eliminated from the ramp voltage during the clamping action.
摘要翻译： 描述了斜坡发生器用于开发用于垂直偏转电视接收机的电子束或横梁的斜坡电压。 斜坡发生器接收由接收器开发的垂直速率脉冲，用于在垂直速率脉冲发生期间产生充电电流。 也产生放电电流，并且将两个电流施加到电容器，用于产生增加然后在幅度上减小的斜坡电压。 当接收到垂直脉冲以将电容器上的斜坡电压通过低阻抗路径钳位到预定峰值电压时，发生器中的钳位电路被使能，使得在钳位动作期间基本上消除了斜坡电压中的不需要的电压分量。
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公开(公告)号：US4106054A
公开(公告)日：1978-08-08
申请号：US760777
申请日：1977-01-19
申请人： George J. Tzakis
发明人： George J. Tzakis
CPC分类号： H04N9/68
摘要： A color television receiver chrominance channel has first and second chrominance amplifiers supplying chrominance demodulators. An automatic chrominance control (ACC) is operative upon the first chrominance amplifier to maintain a substantially constant signal level. An automatic chrominance level control including a symmetrical amplitude limiter having a nonlinear gain characteristic for chrominance signals above a predetermined amplitude threshold is interposed between the first and second chrominance amplifiers.
摘要翻译： 彩色电视接收机色度通道具有提供色度解调器的第一和第二色度放大器。 自动色度控制（ACC）在第一色度放大器上操作以维持基本恒定的信号电平。 包括具有高于预定幅度阈值的色度信号的非线性增益特性的对称幅度限制器的自动色度电平控制被插入在第一和第二色度放大器之间。
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公开(公告)号：US4338630A
公开(公告)日：1982-07-06
申请号：US216451
申请日：1980-12-15
IPC分类号： H04N5/18
CPC分类号： H04N5/185
摘要： A DC coupling reduction circuit for use in a television receiver having a DC restoration circuit comprises means for developing a dynamic adjustment signal by attenuating a video signal by a selected percentage, inverting the attenuated signal and low pass filtering the attenuated and inverted signal. The dynamic adjustment signal is combined with a viewer selected direct current black level reference signal to produce a combined signal which is coupled to the black clamp level determining input of the DC restoration circuit whereby the black level of the video signal is clamped at a potential which is a function of the video signal. Preferably, the cut-off point of the cathode ray tube of the television receiver is set at a level between the levels of the combined signals produced in response to a video signal representing a white image and a video signal representing a black image.
摘要翻译： 一种用于具有直流恢复电路的电视接收机的直流耦合降低电路包括用于通过使视频信号衰减所选百分比来产生动态调整信号的装置，使衰减信号反相并对衰减和反相信号进行低通滤波。 动态调整信号与观众选择的直流黑电平参考信号组合以产生耦合到DC恢复电路的黑钳位电平确定输入的组合信号，由此将视频信号的黑电平钳位在电位 是视频信号的功能。 优选地，电视接收机的阴极射线管的截止点被设置在响应于表示白色图像的视频信号和表示黑色图像的视频信号产生的组合信号的电平之间的电平。
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公开(公告)号：US4237478A
公开(公告)日：1980-12-02
申请号：US32318
申请日：1979-04-23
CPC分类号： H04N9/66
摘要： An integrated injection and demodulation system is described for developing three color-difference signals in a color television receiver. To employ three separate demodulators, one for each color-difference signal, on a single integrated circuit chip without increasing the number of externally generated oscillator injection signals required, the system utilizes two such injection signals whose phases and amplitudes are such that their vector differences are employed to demodulate along one axis, and one of the injection signals is used to demodulate along a second axis. In addition, a fraction of one of the injected signals is developed inside the chip and vectorily subtracted from the other injection signal for demodulation by the resultant signal along the third color-difference axis.
摘要翻译： 描述了用于在彩色电视接收机中开发三个色差信号的集成注入和解调系统。 为了在单个集成电路芯片上采用三个单独的解调器，每个色差信号一个，而不增加所需的外部产生的振荡器注入信号的数量，系统利用两个这样的注入信号，其相位和幅度使得它们的矢量差为 用于沿着一个轴进行解调，并且使用一个注入信号沿第二轴进行解调。 此外，一部分注入的信号在芯片内展开，并从其它注入信号中被矢量地减去，以便通过所得到的信号沿着第三色差轴进行解调。
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公开(公告)号：US4513320A
公开(公告)日：1985-04-23
申请号：US472785
申请日：1983-03-07
CPC分类号： H04N5/57 , H03F3/45071 , H03F3/68 , H04N5/208
摘要： A luminance peaking circuit includes a common and differential mode amplifier comprising a first differentially coupled pair of transistors coupled to a current source and functioning in a differential mode and a second differentially coupled pair of transistors functioning in a common mode. The bases of the second pair of transistors are connected together and to the base of one of the first pair of transistors. The inputs to the amplifier comprise a common mode signal and a differential mode signal and the outputs are matrixed to produce common mode signal components with opposite polarity differential mode components. The amplifier is characterized by a differential mode gain that is independent of common mode signal level and a common mode gain that is independent of differential signal level.
摘要翻译： 亮度峰化电路包括公共和差模放大器，其包括耦合到电流源并以差分模式工作的第一差分耦合的晶体管和在共模中工作的第二差分耦合的晶体管对。 第二对晶体管的基极连接在一起并连接到第一对晶体管之一的基极。 放大器的输入包括一个共模信号和一个差分模式信号，并且输出被矩阵化以产生具有相反极性差分模式分量的共模信号分量。 放大器的特征在于独立于共模信号电平的差分模式增益和独立于差分信号电平的共模增益。
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6.发明授权Constant bandwidth RGB output amplifiers having simultaneous gain and DC output voltage control 失效恒定带宽RGB输出放大器具有同时增益和直流输出电压控制
公开(公告)号：US3955212A
公开(公告)日：1976-05-04
申请号：US538632
申请日：1975-01-03
CPC分类号： H04N9/73
摘要： A color television receiver includes conventional circuitry for processing and detecting a received color television signal. Three chrominance-luminance matrices combine detected color difference and luminance signals forming color red, blue and green video signals. Emitter follower coupling stages apply the color video signals individually to each of three output amplifiers which in turn drive the cathode electrodes of a unitized gun CRT. Potentiometers couple the emitter electrodes of the output amplifiers to a source of operating potential providing a simultaneous signal gain and DC output voltage adjustment for each amplifier during CRT color temperature setup. A voltage divider controls the voltage applied to the common screen grid electrode of the CRT providing a master setup adjustment.
摘要翻译： 彩色电视接收机包括用于处理和检测所接收的彩色电视信号的常规电路。 三个色度亮度矩阵组合检测到的色差和形成彩色红色，蓝色和绿色视频信号的亮度信号。 发射极跟随器耦合级将彩色视频信号单独施加到三个输出放大器中的每一个上，这三个输出放大器又驱动单元枪CRT的阴极电极。 电位器将输出放大器的发射极耦合到工作电位源，在CRT色温设置期间为每个放大器提供同时的信号增益和直流输出电压调整。 分压器控制施加到CRT的公共屏栅电极的电压，提供主设置调整。
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公开(公告)号：US4446443A
公开(公告)日：1984-05-01
申请号：US379838
申请日：1982-05-20
摘要： An integratable amplifier is disclosed for developing a high level output signal with reduced power dissipation. The amplifier includes a first circuit (108, 110) which responds to an input signal for developing first and second signal currents whose amplitudes increase and decrease, respectively, in response to an input signal transition of a given direction. A second circuit (32a) receives the first signal current for establishing a third signal current which mirrors the first signal current. The second and third signal currents are received by a third circuit (70a) for conversion thereof to an amplified output signal. To stabilize the gain of the amplifier, a negative feedback path (50a) is coupled between the input signal and the output signal.
摘要翻译： 公开了一种用于开发具有降低功耗的高电平输出信号的可积分放大器。 放大器包括响应于输入信号的第一电路（108,110），用于分别响应于给定方向的输入信号转换而开发振幅增加和减小的第一和第二信号电流。 第二电路（32a）接收用于建立第三信号电流的第一信号电流，其反映第一信号电流。 第二和第三信号电流由第三电路（70a）接收，用于将其转换成放大的输出信号。 为了稳定放大器的增益，负反馈路径（50a）耦合在输入信号和输出信号之间。
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公开(公告)号：US4347528A
公开(公告)日：1982-08-31
申请号：US244422
申请日：1981-03-16
申请人： Fred D. Johnson , George J. Tzakis
发明人： Fred D. Johnson , George J. Tzakis
CPC分类号： H04N9/648
摘要： A circuit is disclosed for establishing proper video output voltages in a color television receiver prior to setting the receiver's G2 voltage. In the preferred embodiment, the circuit includes three emitter follower stages, each coupled to the output of a video amplifier. The collectors of the emitter follower stages are coupled to a supply voltage through a common resistance. A two position switch is connected across the common resistance such that, during normal receiver operation, closure of the switch shunts the common resistance. When G2 set-up is to be effected, the switch is opened so that a predetermined voltage is dropped across the common resistance and the three emitter follower stages have similar, predetermined D.C. output voltages.
摘要翻译： 公开了一种用于在设置接收机的G2电压之前在彩色电视接收机中建立适当的视频输出电压的电路。 在优选实施例中，电路包括三个发射极跟随器级，每个发射极跟随器级耦合到视频放大器的输出端。 射极跟随器级的集电极通过公共电阻耦合到电源电压。 两个位置开关连接在公共电阻上，使得在正常的接收器操作期间，开关的闭合分流公共电阻。 当要实现G2设置时，开关断开，使得预定电压在公共电阻上下降，并且三个射极跟随器级具有相似的预定直流输出电压。
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公开(公告)号：US4344084A
公开(公告)日：1982-08-10
申请号：US231635
申请日：1981-02-04
CPC分类号： H04N9/64
摘要： A VIR Correction system is disclosed for use in a system such as a color television receiver. Television signals of the type under consideration include a plurality of video lines, each line having a standard color burst and video chrominance. On line 19 of each television field, a VIR signal is transmitted which includes a VIR color burst and a VIR chrominance reference. The correction system includes an amplitude comparator for sensing the difference in amplitude between the VIR color burst and the VIR chrominance reference, and for developing an amplitude error signal indicative of the sensed difference. A phase comparator develops a phase error signal on sensing a phase difference between the VIR color burst and the VIR chrominance reference. A phase controller receives at least the standard color burst portion of the television signal and responds to the phase error signal for correcting the phase of the standard color burst. A gain controller receives at least the video chrominance portion of the television signal and responds to the amplitude error signal for correcting the amplitude of the video chrominance.
摘要翻译： 公开了用于诸如彩色电视接收机的系统中的VIR校正系统。 正在考虑的类型的电视信号包括多条视频线，每行具有标准色同步信号和视频色度。 在每个电视场的线路19上，发送包括VIR彩色脉冲串和VIR色度参考的VIR信号。 该校正系统包括一个振幅比较器，用于感测VIR色同步脉冲和VIR色度参考之间的幅度差，并用于产生一个表示感测差值的振幅误差信号。 相位比较器在感测VIR色同步信号和VIR色度参考之间的相位差时产生相位误差信号。 相位控制器至少接收电视信号的标准彩色脉冲串部分，并响应相位误差信号以校正标准色同步信号的相位。 增益控制器至少接收电视信号的视频色度部分，并响应于用于校正视频色度幅度的幅度误差信号。
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公开(公告)号：US4253109A
公开(公告)日：1981-02-24
申请号：US46588
申请日：1979-06-07
申请人： George J. Tzakis
发明人： George J. Tzakis
CPC分类号： H04N9/643
摘要： A D.C. tint control is described for use in a color television receiver. The tint control receives a pair of 3.8 megahertz currents which are preferably in phase quadrature with each other, and a D.C. control voltage whose value is variable by a viewer to change the tint of reproduced color images. The ting control includes a current-steering circuit responsive to the value of the control voltage for steering a controlled portion of each quadrature current to a load, the latter of which is coupled to a color demodulator. The resultant voltage across the load is a 3.58 megahertz signal whose phase is variable over a reproducible range of about ninety degrees.
摘要翻译： 描述了用于彩色电视接收机的直流电平控制。 色调控制接收一对3.8兆赫兹的电流，其优选地彼此相位正交，以及直流控制电压，其值可由观众改变以改变再现的彩色图像的色调。 调音控制包括电流控制电路，其响应于用于将每个正交电流的受控部分转向负载的控制电压的值，后者耦合到彩色解调器。 负载上的合成电压是一个3.58兆赫的信号，其相位可在约90度的可再现范围内变化。
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