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。

公开(公告)号：US5157510A

公开(公告)日：1992-10-20

申请号：US631858

申请日：1990-12-20

申请人： Ronald Quan ,  John F. Peruzzi

发明人： Ronald Quan ,  John F. Peruzzi

IPC分类号： H04N5/913 ,  H04N7/171

CPC分类号： H04N7/1713 ,  H04N5/913 ,  H04N2005/91314

摘要： A method and apparatus for disabling the effect of copy-protect signals added to a video signal using differences in the characteristics of television and VCR circuitry. Copy-protect signals as described include pseudo-sync pulses and/or added AGC pulses in the vertical blanking intervals of a video signal. The specific method described includes increasing the effective frequency of the copy-protect signals during the vertical blanking intervals 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 comprises pulse narrowing and/or pulse multiplication circuitry which effectively increases the high-frequency content of the pseudo-sync and/or AGC pulses.

摘要翻译： 一种使用电视机和录像机电路的特性差异来禁用添加到视频信号的复制保护信号的效果的方法和装置。 所描述的复制保护信号包括视频信号的垂直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，从而使信号无效地防止复制。 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/或脉冲相乘电路。

公开(公告)号：USRE40689E1

公开(公告)日：2009-03-31

申请号：US08405482

申请日：1995-03-16

申请人： Ronald Quan ,  John F. Peruzzi

发明人： Ronald Quan ,  John F. Peruzzi

IPC分类号： H04N5/76 ,  H04N5/93 ,  H04N7/00 ,  H04N7/167 ,  H04N9/00 ,  H04N9/79 ,  G11B15/04 ,  G11B19/04

CPC分类号： G11B27/028 ,  G10D9/04 ,  G11B20/00086 ,  G11B20/00688 ,  G11B27/024 ,  G11B2220/455 ,  G11B2220/90 ,  G11B2220/91 ,  H04N5/913 ,  H04N21/4353 ,  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 copy protection signals ineffective to prevent in preventing 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 there by render rendering the modified 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.

公开(公告)号：US11418152B2

公开(公告)日：2022-08-16

申请号：US17112474

申请日：2020-12-04

申请人： Ronald Quan

发明人： Ronald Quan

IPC分类号： H03F1/32 ,  H03F1/02

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.

公开(公告)号：US20210344316A1

公开(公告)日：2021-11-04

申请号：US16866399

申请日：2020-05-04

申请人： Ronald Quan

发明人： Ronald Quan

IPC分类号： H03G1/00 ,  H03G3/30

摘要： 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.

公开(公告)号：US11041893B2

公开(公告)日：2021-06-22

申请号：US16572220

申请日：2019-09-16

申请人： Ronald Quan

发明人： Ronald Quan

IPC分类号： G01R23/20 ,  G01R23/18 ,  H03K19/003 ,  H03K17/16 ,  H03F1/26 ,  G01R31/28

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.

公开(公告)号：US20210083640A1

公开(公告)日：2021-03-18

申请号：US17099088

申请日：2020-11-16

申请人： Ronald Quan

发明人： Ronald Quan

IPC分类号： H03G11/08 ,  H03G3/30 ,  H04R29/00

摘要： A system is provided to analyze frequency (or phase) modulation distortion in an audio device, which may include testing with audio frequencies. In one embodiment a change in pitch (or frequency) is measured at an output of the audio device. 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 (or static 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.

公开(公告)号：US10651810B1

公开(公告)日：2020-05-12

申请号：US16513376

申请日：2019-07-16

申请人： Ronald Quan

发明人： Ronald Quan

IPC分类号： H03K3/33 ,  H03K17/16 ,  H03K19/00 ,  H01L27/088 ,  H03K17/042 ,  H03G1/00 ,  H03G3/30 ,  H03K4/06 ,  H01L29/808 ,  H01P1/22

摘要： 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.

公开(公告)号：US10067177B2

公开(公告)日：2018-09-04

申请号：US15151440

申请日：2016-05-10

申请人： Ronald Quan

发明人： Ronald Quan

IPC分类号： G01R31/28 ,  H04R29/00 ,  G01R23/20

摘要： A testing method or apparatus utilizes filter banks to measure time varying or dynamic harmonic distortion or intermodulation distortion from a device. With a stairstep or arbitrary signal and filter banks, Nth order harmonic and or intermodulation distortion is measured via the filter banks at different offsets provided by an arbitrary low frequency signal.An amplifier with crossover distortion will show increased harmonic and or intermodulation distortion near the zero crossing while providing less distortion in other portions of the transfer curve of the amplifier. One or more distortion signals from the device (e.g., audio device) may be measured for a phase and or frequency modulation effect.

公开(公告)号：US20170118569A1

公开(公告)日：2017-04-27

申请号：US15397767

申请日：2017-01-04

申请人： Ronald Quan

发明人： Ronald Quan

IPC分类号： H04R29/00

CPC分类号： H04R29/001 ,  H04R29/004 ,  H04R29/008 ,  H04R2430/03

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.