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.

公开(公告)号：US08643359B2

公开(公告)日：2014-02-04

申请号：US12456752

申请日：2009-06-22

申请人： Ronald Quan

发明人： Ronald Quan

IPC分类号： G01R23/16

CPC分类号： G01R23/20 ,  G01R27/28 ,  G01R31/2825 ,  G10L25/69

摘要： A testing method or apparatus utilizes multiple frequencies applied to a device under test for measuring newly discovered frequency modulation effects. An embodiment may include a lower frequency signal with a smaller amplitude higher frequency signal to test a dynamic change in frequency response, gain, and or phase. This dynamic test can reveal frequency modulation effects. Another embodiment may include the use of a multiple frequency signal to dynamically induce a time varying phase or frequency distortion for the device that has differential phase distortion. The device's output is then measured with an FM detector to measure a shift in one of the frequencies used in the test signal or to measure frequency modulation effects of any signals, including distortion products, from the device. Yet another embodiment of the invention may include biasing a device with a voltage to span the output voltage range of the device while measuring harmonic or intermodulation distortion or phase or frequency response at the various operating points.

摘要翻译： 测试方法或装置利用施加到被测器件的多个频率来测量新发现的频率调制效应。 一个实施例可以包括具有较小振幅较高频率信号的较低频率信号，以测试频率响应，增益和/或相位的动态变化。 这种动态测试可以显示频率调制效应。 另一实施例可以包括使用多频率信号来动态地诱导具有差分相位失真的装置的时变相位或频率失真。 然后使用FM检测器测量设备的输出，以测量测试信号中使用的一个频率的偏移量，或者测量来自设备的任何信号（包括失真产物）的调频效果。 本发明的另一个实施例可以包括在测量各种工作点处的谐波或互调失真或相位或频率响应的同时偏置具有跨越器件的输出电压范围的电压的器件。

公开(公告)号：US20130058629A1

公开(公告)日：2013-03-07

申请号：US13584569

申请日：2012-08-13

申请人： Ronald Quan ,  John O. Ryan ,  Peter Wonfor

发明人： Ronald Quan ,  John O. Ryan ,  Peter Wonfor

IPC分类号： H04N9/80

CPC分类号： H04N21/812 ,  H04H60/375 ,  H04H60/58 ,  H04H60/59 ,  H04N5/76 ,  H04N21/233 ,  H04N21/234 ,  H04N21/4334

摘要： A method and apparatus is disclosed which reduces or removes the effectiveness of commercial skip systems such as presently found in VCRs, PVRs, etc. which are designed to delete commercials from signal material upon playback of a previously recorded version of the signal material. In an embodiment, the effectiveness of the commercial skip system is reduced or removed by adding a flat field of selected signal level to active line portions of video lines of the signal material. Other embodiments modify the normal fade to black signal indicative of a commercial to provide a fade to non-black signal. In further embodiments, a fade to non-black signal is inserted in an overscan area of the signal picture. Still further embodiments modify audio signals or selected signals in the horizontal blanking interval which may be used in commercial skip systems to detect the presence of commercials.

公开(公告)号：US08374490B2

公开(公告)日：2013-02-12

申请号：US12711834

申请日：2010-02-24

申请人： Ronald Quan

发明人： Ronald Quan

IPC分类号： H04N9/80

CPC分类号： H04N5/765 ,  H04N5/782 ,  H04N21/42204 ,  H04N2005/91307

摘要： An integrated circuit or system receives a bit pattern from a metadata, IPG, and or EPG signal. This bit pattern is then coupled to a circuit to provide a content control command to a recorder or to a processing circuit to generate a content control signal. In particular the bit pattern may be utilized in a manner to program, enable, or disable the generated control signal. Furthermore this content control signal provides resistance to a circumvention device. For example, the circumvention device is unable to remove sufficiently the content control signal, and content control is maintained.

摘要翻译： 集成电路或系统从元数据，IPG和/或EPG信号接收位模式。 该位模式然后被耦合到电路以向记录器或处理电路提供内容控制命令以产生内容控制信号。 特别地，位模式可以以编程，使能或禁止所产生的控制信号的方式被利用。 此外，该内容控制信号提供对规避设备的电阻。 例如，规避装置不能充分地去除内容控制信号，并且保持内容控制。