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11. 发明授权

US4628346A Electrical servo system having manual override affecting servo loop gain 失效
标题翻译：电动伺服系统具有影响伺服环路增益的手动超驰
公开(公告)号：US4628346A
公开(公告)日：1986-12-09
申请号：US605250
申请日：1984-04-30
申请人： Leopold A. Harwood
发明人： Leopold A. Harwood
IPC分类号： H04N9/64
CPC分类号： H04N9/643
摘要： In a color television receiver, color reference oscillations, developed by a VCO under AFPC loop control, are supplied to a variable phase shifter. A phase detector, responsive to the phase shifter output and to the burst component of received color television signals, develops a control voltage indicative of the phase relationship therebetween at its output terminal. Application of the control voltage to a control voltage input terminal of the phase shifter completes a servo control loop for maintaining the phase of the shifter's output in a predetermined relationship with the burst phase. A manual hue control potentiometer has an adjustable tap connected to the phase detector output terminal in such manner that tap adjustment alters voltage at control voltage input terminal while concomitantly altering servo loop gain.
摘要翻译：在彩色电视接收机中，在AFPC环路控制下由VCO开发的色彩参考振荡被提供给可变移相器。响应于移相器输出和接收的彩色电视信号的突发分量的相位检测器在其输出端产生指示它们之间的相位关系的控制电压。将控制电压施加到移相器的控制电压输入端完成伺服控制回路，用于将移位器输出的相位与突发相位保持预定的关系。手动色调控制电位器具有连接到相位检测器输出端子的可调抽头，使得抽头调节改变控制电压输入端子处的电压，同时改变伺服环路增益。

12. 发明授权

US4625233A I-phase fleshtone correction system using R-Y, G-Y and B-Y color difference signal demodulators 失效
标题翻译：使用R-Y，G-Y和B-Y色差信号解调器的I相fleshone校正系统
公开(公告)号：US4625233A
公开(公告)日：1986-11-25
申请号：US748756
申请日：1985-06-26
申请人： Leopold A. Harwood
发明人： Leopold A. Harwood
IPC分类号： H04N9/64 , H04N9/66
CPC分类号： H04N9/66 , H04N9/643
摘要： In a chrominance signal demodulating system a locally regenerated chrominance subcarrier signal is phase shifted to produce R-Y, G-Y and B-Y phase subcarrier signals, which are applied to respective color difference signal demodulators together with the chrominance signal to be demodulated for producing demodulated R-Y, G-Y and B-Y color image difference signals. The subcarrier signal is at the "I" phase and is processed by an automatic flesh tone correction network responsive to chrominance signal phases in the vicinity of I phase.
摘要翻译：在色度信号解调系统中，本地再生的色度副载波信号被相移以产生RY，GY和BY相位副载波信号，它们被加到相应的色差信号解调器以及待解调的色度信号，以产生解调的RY，GY和 BY彩色图像差分信号。子载波信号处于“I”相位并且响应于I相位附近的色度信号相位而被自动肤色校正网络处理。

13. 发明授权

US4616254A Hanging dot reduction system 失效
标题翻译：挂点减少系统
公开(公告)号：US4616254A
公开(公告)日：1986-10-07
申请号：US724647
申请日：1985-04-18
申请人： Leopold A. Harwood , Kirk A. Law
发明人： Leopold A. Harwood , Kirk A. Law
IPC分类号： H04N9/78 , H04N9/64
CPC分类号： H04N9/78
摘要： Control signal generator is responsive to the output of a pair of correlation indicators. One correlation indicator provides an indication of the presence or absence of correlation between high frequency components derived without difference in delay from the respective luminance and chrominance outputs of a color TV receiver's comb filter system. The other correlation indicator provides an indication of the presence or absence of correlation between high frequency components derived with a difference in delay from the respective comb filter outputs, the delay difference corresponding to a quarter period at the nominal color subcarrier frequency. Control signal is developed in response to a correlation indication by either or both of the indicators. The luminance output of the comb filter is subjected to high frequency component removal during control signal development.
摘要翻译：控制信号发生器响应于一对相关指示器的输出。一个相关指示符提供了与彩色电视接收机的梳状滤波器系统的相应亮度和色度输出之间的延迟差异导出的高频分量之间存在或不存在相关性的指示。另一个相关指示器提供了与来自各个梳状滤波器输出的延迟差导出的高频分量之间的相关性的存在或不存在，对应于标称彩色副载波频率的四分之一周期的延迟差。响应于两者或两者之一的相关指示来开发控制信号。梳状滤波器的亮度输出在控制信号开发期间经受高频分量去除。

14. 发明授权

US4611240A Chrominance processor control system 失效
标题翻译：色度处理器控制系统
公开(公告)号：US4611240A
公开(公告)日：1986-09-09
申请号：US594398
申请日：1984-03-28
申请人： Leopold A. Harwood
发明人： Leopold A. Harwood
IPC分类号： H04N9/45 , H04N9/44 , H04N9/64
CPC分类号： H04N9/44
摘要： In a color TV receiver, a color AFPC loop, responsive to line rate synchronizing bursts of subcarrier frequency derived from the output of a first of a pair of cascaded chrominance signal amplifiers, controls the frequency and phase of an output of a VCO. The VCO output is passed through a variable phase shifter external to the AFPC loop to develop reference oscillations for use by color demodulators. Control of the variable phase shifter is effected by the output of a phase detector which compares the phases of (a) an output of the variable phase shifter and (b) line rate synchronizing bursts derived from an output of the second chrominance signal amplifier.
摘要翻译：在彩色TV接收机中，响应于从一对级联色度信号放大器中的第一个的输出导出的副载波频率的线速同步脉冲串的彩色AFPC环路控制VCO的输出的频率和相位。 VCO输出通过AFPC环路外部的可变移相器，以产生用于彩色解调器的参考振荡。可变移相器的控制通过相位检测器的输出来实现，相位检测器比较（a）可变移相器的输出和（b）从第二色度信号放大器的输出导出的线速率同步脉冲串的相位。

15. 发明授权

US4555722A Tri-level sandcastle pulse decoder 失效
标题翻译：三级沙堡脉冲解码器
公开(公告)号：US4555722A
公开(公告)日：1985-11-26
申请号：US561331
申请日：1983-12-14
申请人： Leopold A. Harwood , Robert L. Shanley, II
发明人： Leopold A. Harwood , Robert L. Shanley, II
IPC分类号： H04N5/18 , H04N3/24 , H04N9/44 , H04N9/64 , H04N9/72 , H04N9/73 , H04N9/77 , H03K13/00
CPC分类号： H04N9/44
摘要： Trilevel sandcastle pulse decoder includes a trio of voltage comparators for comparing incoming sandcastle pulses with reference potentials of respectively different levels. One of the voltage comparators, which is subject to change in operating state in response to appearance of a given level of the sandcastle pulse, is precluded from operating state change in response to the appearance of the next higher level of the sandcastle pulse by control circuitry responsive to the output of a second of the voltage comparators. One of the decoder outputs is developed by logic circuitry responsive to outputs of two of the comparators.
摘要翻译： Trilevel沙堡脉冲解码器包括三个电压比较器，用于将进入的沙堡脉冲与不同电平的参考电位进行比较。响应于给定水平的沙堡脉冲的出现而经受操作状态变化的电压比较器中的一个被控制电路响应于下一个更高水平的沙堡脉冲的出现被排除在操作状态变化之外响应于第二电压比较器的输出。解码器输出之一由逻辑电路开发，响应于两个比较器的输出。

16. 发明授权

US4426625A Circuit for linearly gain controlling a differential amplifier 失效
标题翻译：用于线性增益控制差分放大器的电路
公开(公告)号：US4426625A
公开(公告)日：1984-01-17
申请号：US296865
申请日：1981-08-27
申请人： Leopold A. Harwood , Robert L. Shanley, II
发明人： Leopold A. Harwood , Robert L. Shanley, II
IPC分类号： H03G1/00 , H03G3/00 , H03G3/10 , H04N9/77 , H03F3/45 , H03G3/30
CPC分类号： H03G3/10 , H03G1/0023 , H03G3/00
摘要： A circuit for linearly controlling the gain of a differential amplifier includes a differentially connected current splitter network biased by means of a symmetrical bias circuit coupled to a common operating potential and including first and second current sources with associated first and second impedances. The current splitter includes a diode exhibiting a non-linear voltage in response to linear current conduction, and a transistor. The bias circuit responds to a variable gain control voltage for causing the diode to conduct current which varies linearly with the gain control voltage. First and second mutually differential control voltages derived from the transistor and diode, including a non-linearly varying voltage exhibited by the diode, are applied to the differential amplifier for controlling the conduction of the differential amplifier linearly with respect to the original control voltage.
摘要翻译：用于线性控制差分放大器的增益的电路包括通过耦合到公共工作电位的对称偏置电路偏置的差分连接的分流器网络，并且包括具有相关联的第一和第二阻抗的第一和第二电流源。电流分路器包括响应于线性电流传导而呈现非线性电压的二极管和晶体管。偏置电路响应于可变增益控制电压，以使二极管导通电流，其随着增益控制电压线性变化。将由二极管显示的包括非线性变化电压的晶体管和二极管导出的第一和第二相互差分控制电压施加到差分放大器，用于相对于原始控制电压线性地控制差分放大器的导通。

17. 发明授权

US4272778A Color-difference signal processing circuits 失效
标题翻译：色差信号处理电路
公开(公告)号：US4272778A
公开(公告)日：1981-06-09
申请号：US126783
申请日：1980-03-03
申请人： Leopold A. Harwood , Robert L. Shanley, II
发明人： Leopold A. Harwood , Robert L. Shanley, II
IPC分类号： H04N9/67 , H04N9/66 , H04N9/50 , H04N9/52
CPC分类号： H04N9/66
摘要： A first resistive current path is DC connected between respective output terminals of push-pull color demodulator. A second resistive current path is DC connected between respective output terminals of a second push-pull color demodulator. An output color-difference signal is formed by a differential amplifier having one input DC connected to an asymmetrically positioned point in first resistive current path, and a second input DC connected to an asymmetrically positioned point in second resistive current path. Output color-difference signal corresponds to a combination of the demodulated signals, with a polarity relationship and magnitude ratio determined by the asymmetry of positioning of the takeoff points in the respective current paths. Output quiescent voltage is independent of the asymmetry of positioning of the takeoff points.
摘要翻译：第一电阻电流路径是直流连接在推挽色彩解调器的相应输出端之间。第二电阻电流路径是DC连接在第二推挽彩色解调器的相应输出端之间。输出色差信号由具有连接到第一电阻电流路径中的非对称定位点的一个输入DC的差分放大器和连接到第二电阻电流路径中的非对称定位点的第二输入DC形成。输出色差信号对应于解调信号的组合，具有由相应电流路径中的取样点的定位的不对称性确定的极性关系和幅度比。输出静态电压独立于起飞点定位的不对称性。

18. 发明授权

US4249199A Phase compensated controlled oscillator 失效
标题翻译：相位补偿控制振荡器
公开(公告)号：US4249199A
公开(公告)日：1981-02-03
申请号：US82469
申请日：1979-10-09
申请人： Leopold A. Harwood , Erwin J. Wittmann
发明人： Leopold A. Harwood , Erwin J. Wittmann
IPC分类号： H03B5/00 , H03L7/099 , H04N9/45 , H04N9/455 , H04N9/46
CPC分类号： H04N9/455
摘要： A controlled oscillator comprises an amplifier including an active device, a filter network arranged in a feedback loop of the amplifier for providing regenerative feedback to sustain oscillation of the amplifier, and a source of control signals. Output oscillatory signals from the amplifier and output control signals from the control source are summed by a combining network to produce a resultant controlled signal, which is coupled to the filter network. Parasitic capacitances associated with output terminals of the amplifier and control source impart an unwanted phase shift to the controlled signal. A compensation signal derived from the oscillator is supplied to the combining network with a magnitude and phase to offset the unwanted phase shift, to thereby produce a phase compensated resultant controlled signal.
摘要翻译：受控振荡器包括放大器，其包括有源器件，布置在放大器的反馈环路中的滤波器网络，用于提供用于维持放大器的振荡的再生反馈和控制信号源。来自放大器的输出振荡信号和来自控制源的输出控制信号由组合网络相加，以产生耦合到滤波器网络的合成受控信号。与放大器和控制源的输出端相关联的寄生电容对受控信号施加不希望的相移。从振荡器得到的补偿信号被提供给具有幅度和相位的组合网络以抵消不想要的相移，从而产生相位补偿的合成受控信号。

19. 发明授权

US4229759A Signal detector including sample and hold circuit with reduced offset error 失效
标题翻译：信号检测器包括采样和保持电路，减少偏移误差
公开(公告)号：US4229759A
公开(公告)日：1980-10-21
申请号：US936039
申请日：1978-08-23
申请人： Leopold A. Harwood , Erwin J. Wittmann
发明人： Leopold A. Harwood , Erwin J. Wittmann
IPC分类号： H03L7/06 , G11C27/02 , H03D13/00 , H03L7/091 , H04N9/45 , H04N9/455 , H04N9/46 , H03B3/04
CPC分类号： H04N9/455 , G11C27/024 , H03D13/008 , H03L7/091
摘要： A sample and hold detector arrangement suitable for construction in integrated circuit form as an automatic chroma gain control detector, or a color oscillator AFPC detector, or the like. A wide bandwidth analog multiplier circuit is supplied with an intermittent reference signal and a second signal, the phase or amplitude of which is to be sampled. In a preferred embodiment, the reference signal corresponds to the burst component of a composite color television signal and the second signal corresponds to a locally generated color subcarrier signal. The multiplier provides oppositely phased output signals which are coupled to first and second sample and hold circuits. Each sample and hold circuit is keyed to concurrently sample the respective multiplier outputs for the same sampling interval, and each provides substantially symmetrical bidirectional conduction to associated filter capacitors during the sampling interval and a high holding impedance during the remainder of each cycle.
摘要翻译：适用于集成电路形式的采样和保持检测器装置，作为自动色度增益控制检测器或彩色振荡器AFPC检测器等。宽带模拟乘法器电路被提供有间歇参考信号和第二信号，其相位或幅度将被采样。在优选实施例中，参考信号对应于复合彩色电视信号的突发分量，第二信号对应于本地产生的彩色副载波信号。乘法器提供相反的相位输出信号，其耦合到第一和第二采样和保持电路。每个采样和保持电路都被键入，以便以相同的采样间隔对相应的乘法器输出进行采样，并且每个采样和保持电路在采样间隔期间提供基本对称的双向导通到相关滤波电容器，并且在每个周期的剩余时间内提供高保持阻抗。

20. 发明授权

US4197557A Brightness control circuit employing a closed control loop 失效
标题翻译：采用闭环控制回路的亮度控制电路
公开(公告)号：US4197557A
公开(公告)日：1980-04-08
申请号：US794128
申请日：1977-05-05
申请人： Alois V. Tuma , Leopold A. Harwood , Willem H. Groenweg
发明人： Alois V. Tuma , Leopold A. Harwood , Willem H. Groenweg
IPC分类号： H04N5/57 , H04N5/59 , H04N5/16 , H04N5/14 , H04N5/18
CPC分类号： H04N5/59
摘要： Brightness control apparatus for a video signal image reproducing system including a video signal processing channel, a source of reference voltage for establishing a desired level of image brightness, and a keyed comparator circuit. The comparator forms a closed control loop with the signal processing channel, and is keyed during periodic blanking intervals of the video signal to sense the magnitude of the reference voltage and a brightness representative blanking level of the video signal which may vary undesirably. The comparator provides an output control signal indicative of a voltage difference between the reference voltage and the blanking level. The control voltage is applied to the signal channel for translating the blanking level in a direction to minimize the voltage difference, so that a desired relationship between the reference voltage and the blanking level is preserved.
摘要翻译：用于视频信号图像再现系统的亮度控制装置，包括视频信号处理通道，用于建立期望的图像亮度级别的参考电压源和键控比较器电路。比较器形成具有信号处理通道的闭合控制回路，并且在视频信号的周期性消隐间隔期间被键入，以感测参考电压的大小以及视频信号的亮度代表性消隐电平，其可能会不期望地变化。比较器提供指示参考电压和消隐电平之间的电压差的输出控制信号。控制电压被施加到信号通道，用于平移消隐电平以使电压差最小化，从而保持参考电压和消隐电平之间的期望的关系。

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