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101. 发明授权

US5748733A Method and apparatus to reduce effects of certain copy protection purses within a video signal 失效
标题翻译：降低视频信号内某些防拷贝影响的方法和装置
公开(公告)号：US5748733A
公开(公告)日：1998-05-05
申请号：US753970
申请日：1996-12-04
申请人： Ronald Quan
发明人： Ronald Quan
IPC分类号： H04N5/91 , G06F21/10 , H04N5/913 , H04N7/171 , H04N5/92
CPC分类号： H04N7/171 , H04N5/913 , H04N2005/91314 , H04N2005/91371 , H04N2005/91378 , H04N2005/91385
摘要： Enhancements to a video anticopying process that causes an abnormally low amplitude video signal to be recorded on an illegal copy. The enhancements in one version introduce into the overscan portion of the television picture, just prior to the horizontal or vertical sync signals but in active video, a negative going waveform that appears to the television receiver or videotape recorder to be a sync signal, thereby causing an early horizontal or vertical retrace. One version provides (in the right overscan portion of the picture), a checker pattern of alternating gray and black areas which causes the TV set on which the illegal copy is played to horizontally retrace earlier than normal in selected lines with a consequential horizontal shift of the picture information on those lines. This substantially degrades picture viewability. In another version a gray pattern at the bottom overscan portion of the picture causes vertical picture instability. In another version selected horizontal sync signals are narrowed, causing irregular vertical retraces. Also provided is apparatus for removing or attenuating these enhancements from the video signal, to allow copying.
摘要翻译：对视频防篡改过程的增强，导致异常低幅度的视频信号被记录在非法拷贝上。一个版本的增强功能在电视图像的过扫描部分之前，在水平或垂直同步信号之前，但是在活动视频中，将电视接收机或录像带录像机呈现为同步信号的负向波形，从而导致早期水平或垂直回溯。一个版本提供（在图片的右侧过扫描部分），交替的灰色和黑色区域的棋盘图案，使得非法拷贝播放的电视机在选定的行中比正常地水平回溯，伴随着相应的水平移位这些线上的图片信息。这显着降低了图像的可视性。在另一个版本中，图片底部过扫描部分的灰色图案导致垂直图像不稳定。在另一版本中，所选择的水平同步信号变窄，导致不规则的垂直回扫。还提供了用于从视频信号中去除或衰减这些增强的装置，以允许复制。

102. 发明授权

US5194965A Method and apparatus for disabling anti-copy protection system in video signals 失效
标题翻译：禁止视频信号防拷贝保护系统的方法和装置
公开(公告)号：US5194965A
公开(公告)日：1993-03-16
申请号：US614185
申请日：1990-11-13
申请人： Ronald Quan , John F. Peruzzi
发明人： Ronald Quan , John F. Peruzzi
IPC分类号： G11B20/02 , G10D9/04 , G11B27/024 , G11B27/028 , H04N5/7826 , H04N5/91 , H04N5/913
CPC分类号： G10D9/04 , G11B20/00086 , G11B20/00688 , G11B27/028 , H04N21/4353 , H04N5/913 , G11B2220/455 , G11B2220/90 , G11B2220/91 , G11B27/024 , H04N2005/91314
摘要： A method and apparatus for disabling the effect of copy-protect signals placed in a recording video signals which is based on differences in the characteristics of television and VCR circuitry. Copy-protect signals include pseudo-sync pulses and/or added AGC pulses in the blanking interval of a video signal. The specific method described includes altering the level of the video signal during the vertical blanking interval, e.g., level-shifting, so as to render the copy-protect signals ineffective to prevent unauthorized copying by a VCR. A circuit for achieving the method includes a sync separator for detecting the vertical blanking interval, pulse generating circuits for producing pulses of predetermined widths during this interval, and a summing circuit for summing the predetermined pulses with copy-protect signals thereby to shift their level. An alternative method includes increasing the effective frequency of the copy-protect signals during the vertical blanking interval so as to achieve attenuation and/or low-pass filtering in the VCR circuitry to thereby render the signals ineffective in preventing copying. A circuit for achieving this method includes pulse narrowing and/or pulse multiplication circuitry which effectively increased the high-frequency content of the pseudo-sync and/or AGC pulses.
摘要翻译：一种用于禁止放置在基于电视和VCR电路的特性不同的记录视频信号中的复制保护信号的效果的方法和装置。复制保护信号包括视频信号的消隐间隔中的伪同步脉冲和/或附加的AGC脉冲。所描述的具体方法包括在垂直消隐间隔（例如，电平移位）期间改变视频信号的电平，以便使复制保护信号无效以防止VCR的未经授权的复制。用于实现该方法的电路包括用于检测垂直消隐间隔的同步分离器，用于在该间隔期间产生预定宽度的脉冲的脉冲发生电路，以及用于将预定脉冲与复制保护信号相加从而将其电平转换的求和电路。一种替代方法包括在垂直消隐间隔期间增加复制保护信号的有效频率，以便在VCR电路中实现衰减和/或低通滤波，从而使信号在防止复制方面无效。用于实现该方法的电路包括有效地增加伪同步和/或AGC脉冲的高频内容的脉冲窄化和/或脉冲乘法电路。

103. 发明授权

US4458213A Constant quiescent current, class AB amplifier output stage 失效
标题翻译：恒定静态电流，AB类放大器输出级
公开(公告)号：US4458213A
公开(公告)日：1984-07-03
申请号：US449133
申请日：1982-12-13
申请人： Ronald Quan
发明人： Ronald Quan
IPC分类号： H03F3/34 , H03F1/30 , H03F3/21 , H03F3/30
CPC分类号： H03F1/303
摘要： A circuit maintains the quiescent collector current of an output transistor amplifier constant by sensing the voltage developed across a resistor connected in series with the output transistor's collector and, using a differential amplifier, produces a first signal representative thereof which is sampled and held by a circuit controlled by a zero voltage crossing detector sensitive to the amplifier output voltage. The sampled and held signal is inverted and integrated with respect to an adjustable reference voltage to produce a second signal. The second signal controls the current passed by a transistor connected in a voltage divider network supplying the base bias voltage to the output transistor.
摘要翻译：电路通过感测与输出晶体管的集电极串联连接的电阻器上产生的电压来维持输出晶体管放大器的静态集电极电流恒定，并且使用差分放大器产生代表其的第一信号，其被电路采样和保持由零电压交叉检测器控制，对放大器输出电压敏感。采样和保持的信号相对于可调参考电压被反相和积分以产生第二信号。第二信号控制连接在分压网络中的晶体管的电流，从而将基极偏置电压提供给输出晶体管。

104. 发明授权

US4297620A Quasi feedback horizontal scan linearization for cathode ray tubes 失效
标题翻译：阴极射线管的准反馈水平扫描线性化
公开(公告)号：US4297620A
公开(公告)日：1981-10-27
申请号：US129059
申请日：1980-03-10
申请人： Ronald Quan
发明人： Ronald Quan
IPC分类号： H04N3/23 , H03K4/62 , H04N3/16 , H04N3/233 , H01J29/72
CPC分类号： H04N3/233 , H03K4/62
摘要： A horizontal scan linearization circuit generates a linear ramp voltage during the active picture scan interval, which is compared to the non-linear ramp current of a cathode ray tube yoke circuit. The difference signal is fed back to the yoke circuit via a damper diode and is selectively added to the non-linear yoke current to correct the non-linearity.
摘要翻译：水平扫描线性化电路在有源图像扫描间隔期间产生线性斜坡电压，其与阴极射线管磁轭电路的非线性斜坡电流进行比较。差分信号通过阻尼二极管反馈到磁轭电路，并选择性地添加到非线性磁轭电流以校正非线性。

105. 发明公开

US20240007808A1 METHOD AND APPARATUS TO EVALUATE AUDIO EQUIPMENT FOR DYNAMIC DISTORTIONS AND OR DIFFERENTIAL PHASE AND OR FREQUENCY MODULATION EFFECTS 审中-公开
公开(公告)号：US20240007808A1
公开(公告)日：2024-01-04
申请号：US17856935
申请日：2022-07-01
申请人： Ronald Quan
发明人： Ronald Quan
IPC分类号： H04R29/00
CPC分类号： H04R29/00
摘要： A system is provided to analyze cross-modulation distortion in audio devices, which may include testing with audio frequencies. One or more distortion signals from the audio device may be measured for an amplitude, phase, and or frequency modulation effect. In another embodiment a musical signal may be used as a test signal. Providing additional test signals to the audio device can induce a time varying cross-modulation distortion signal from an output of the audio device. Also utilizing at least one additional filter, filter bank, demodulator and or frequency converter and or frequency multiplier provides extra examination of distortion. Also frequency and or phase response can be measured with the presence of a de-sensing signal and or another signal that induce near slew rate limiting or near overload condition of the device under test. Another system is provided to analyze modulation index differences between input and output signals for a test signal including modulation.

106. 发明授权

US11425518B2 Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effects 有权
公开(公告)号：US11425518B2
公开(公告)日：2022-08-23
申请号：US17351918
申请日：2021-06-18
申请人： Ronald Quan
发明人： Ronald Quan
IPC分类号： H04R29/00
摘要： A system is provided to analyze cross-modulation distortion in audio devices, which may include testing with audio frequencies. One or more distortion signals from the audio device may be measured for an amplitude, phase, and or frequency modulation effect. In another embodiment a musical signal may be used as a test signal. Providing additional test signals to the audio device can induce a time varying cross-modulation distortion signal from an output of the audio device. Also utilizing at least one additional filter, filter bank, demodulator and or frequency converter and or frequency multiplier provides extra examination of distortion. Also frequency and or phase response can be measured with the presence of a de-sensing signal and or another signal that induce near slew rate limiting or near overload condition of the device under test.

107. 发明申请

US20210314716A1 METHOD AND APPARATUS TO EVALUATE AUDIO EQUIPMENT FOR DYNAMIC DISTORTIONS AND OR DIFFERENTIAL PHASE AND OR FREQUENCY MODULATION EFFECTS 有权
公开(公告)号：US20210314716A1
公开(公告)日：2021-10-07
申请号：US17351918
申请日：2021-06-18
申请人： Ronald Quan
发明人： Ronald Quan
IPC分类号： H04R29/00
摘要： A system is provided to analyze cross-modulation distortion in audio devices, which may include testing with audio frequencies. One or more distortion signals from the audio device may be measured for an amplitude, phase, and or frequency modulation effect. In another embodiment a musical signal may be used as a test signal. Providing additional test signals to the audio device can induce a time varying cross-modulation distortion signal from an output of the audio device. Also utilizing at least one additional filter, filter bank, demodulator and or frequency converter and or frequency multiplier provides extra examination of distortion. Also frequency and or phase response can be measured with the presence of a de-sensing signal and or another signal that induce near slew rate limiting or near overload condition of the device under test.

108. 发明授权

US10879864B2 Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effects 有权
公开(公告)号：US10879864B2
公开(公告)日：2020-12-29
申请号：US16740462
申请日：2020-01-12
申请人： Ronald Quan
发明人： Ronald Quan
IPC分类号： H03G11/08 , H03G3/30 , H04R29/00
CPC分类号： H03G11/08 , H03G3/3005 , H04R29/001
摘要： A system is provided to analyze cross-modulation distortion in audio devices, which may include testing with audio frequencies. One or more distortion signals from the audio device may be measured for an amplitude, phase, and or frequency modulation effect. In another embodiment a musical signal may be used as a test signal. Providing additional test signals to the audio device can induce a time varying cross-modulation distortion signal from an output of the audio device. Also utilizing at least one additional filter, filter bank, demodulator and or frequency converter and or frequency multiplier provides extra examination of distortion. Also frequency and or phase response can be measured with the presence of a de-sensing signal and or another signal that induce near slew rate limiting or near overload condition of the device under test. Another system is provided to analyze modulation index differences between input and output signals for a test signal including modulation.

109. 发明申请

US20200177145A1 Biasing Circuits for Voltage Controlled or Output Circuits 审中-公开
公开(公告)号：US20200177145A1
公开(公告)日：2020-06-04
申请号：US16208446
申请日：2018-12-03
申请人： Ronald Quan
发明人： Ronald Quan
IPC分类号： H03G1/00 , H03F1/02 , H03F3/45 , H03G3/30
摘要： A number of biasing circuits for amplifiers including voltage controlled amplifier is presented. Also a number of field effect transistor circuits include voltage controlled attenuators or voltage controlled processing circuits. Example circuits include modulators, lower distortion variable voltage controlled resistors, sine wave to triangle wave converters, and or servo controlled biasing circuits.

110. 发明申请

US20190342682A1 METHOD AND APPARATUS TO EVALUATE AUDIO EQUIPMENT FOR DYNAMIC DISTORTIONS AND OR DIFFERENTIAL PHASE AND OR FREQUENCY MODULATION EFFECTS 审中-公开
公开(公告)号：US20190342682A1
公开(公告)日：2019-11-07
申请号：US16517115
申请日：2019-07-19
申请人： Ronald Quan
发明人： Ronald Quan
IPC分类号： H04R29/00 , H04R3/04 , H03G11/08 , G10L21/0264 , G01R23/20
摘要： A system is provided to analyze cross-modulation distortion in audio devices, which may include testing with audio frequencies. One or more distortion signals from the audio device may be measured for an amplitude, phase, and or frequency modulation effect. In another embodiment a musical signal may be used as a test signal. Providing additional test signals to the audio device can induce a time varying cross-modulation distortion signal from an output of the audio device. Also utilizing at least one additional filter, filter bank, demodulator and or frequency converter and or frequency multiplier provides extra examination of distortion. Also frequency and or phase response can be measured with the presence of a de-sensing signal and or another signal that induce near slew rate limiting or near overload condition of the device under test.

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