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11. 发明授权

US6167132A Analog successive approximation (SAR) analog-to-digital converter (ADC) 失效
标题翻译：模拟逐次逼近（SAR）模数转换器（ADC）
公开(公告)号：US6167132A
公开(公告)日：2000-12-26
申请号：US034432
申请日：1998-03-04
申请人： Andrew W. Krone , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
发明人： Andrew W. Krone , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
IPC分类号： H03M1/42 , H04L7/033 , H04L25/02 , H04L25/06 , H04M1/57 , H04M11/06 , H04M19/00 , H04M19/02 , H04M1/00 , H03M3/00 , H04M9/08
CPC分类号： H04L25/06 , H04L7/033 , H04L25/0266 , H04M1/573 , H04M11/06 , H04M19/001 , H04M19/02
摘要： An analog successive approximation (SAR) analog-to-digital converter (ADC) is disclosed that is a compromise between a SAR ADC implementation and a fully parallel thermometer-to-binary ADC. The analog SAR ADC utilizes N comparators for N bits of output and does not require a clock system, control logic, decode logic, or thermometer-to-binary decode circuitry. Conversion speed is determined by the comparator rate, and the comparator outputs may be used directly as the ADC outputs. The analog SAR ADC disclosed is a low complexity, low-precision analog-to-digital converter (ADC) that may be used to digitize phone line status information so that it may be communicated across a isolation barrier as digital information.
摘要翻译：公开了一种模拟逐次逼近（SAR）模数转换器（ADC），这是SAR ADC实现和完全并行的温度计与二进制ADC之间的折衷。模拟SAR ADC为N位输出使用N个比较器，不需要时钟系统，控制逻辑，解码逻辑或温度到二进制解码电路。转换速度由比较器速率决定，比较器输出可直接用作ADC输出。所公开的模拟SAR ADC是一种低复杂度的低精度模/数转换器（ADC），可用于数字化电话线路状态信息，以便将其作为数字信息通过隔离屏障进行通信。

12. 发明授权

US6144326A Digital isolation system with ADC offset calibration 失效
标题翻译：具有ADC偏移校准的数字隔离系统
公开(公告)号：US6144326A
公开(公告)日：2000-11-07
申请号：US34456
申请日：1998-03-04
申请人： Andrew W. Krone , Timothy J. Dupuis , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
发明人： Andrew W. Krone , Timothy J. Dupuis , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
IPC分类号： H03M1/42 , H03M3/00 , H03M3/02 , H04L7/033 , H04L25/02 , H04L25/06 , H04M1/57 , H04M11/06 , H04M19/00 , H04M19/02 , H03M1/06 , H03M1/10
CPC分类号： H04L25/06 , H03M3/384 , H04L25/0266 , H04M1/573 , H04M11/06 , H04M19/001 , H04M19/02 , H03M3/458 , H04L7/033
摘要： A digital capacitive isolation barrier system is provided that is suitable for use in a telephone or modem where the locally powered circuits must be effectively isolated from the public telephone system, while permitting data transfer across the barrier. In particular, an automatic ADC offset calibration system is provided for determining the magnitude of the ADC offset signal required in the system during a calibration operation, and for providing the ADC offset signal during normal operation of the isolation barrier system. Fixed bias signals are also provided for the ADC and for a DAC in the system. In a preferred embodiment, the ADC is located on the isolated side of the isolation barrier, while the integrator and register that determine and hold the offset signal are located on the powered side of the isolation barrier.
摘要翻译：提供了一种适用于电话或调制解调器的数字电容隔离屏障系统，其中本地供电的电路必须与公共电话系统有效地隔离，同时允许跨屏障的数据传输。特别地，提供了自动ADC偏移校准系统，用于在校准操作期间确定系统中所需的ADC偏移信号的大小，以及用于在隔离屏障系统的正常操作期间提供ADC偏移信号。还为ADC和系统中的DAC提供固定偏置信号。在优选实施例中，ADC位于隔离屏障的隔离侧，而确定和保持偏移信号的积分器和寄存器位于隔离屏障的动力侧。

13. 发明授权

US07050509B2 Digital isolation system with hybrid circuit in ADC calibration loop 失效
公开(公告)号：US07050509B2
公开(公告)日：2006-05-23
申请号：US10161902
申请日：2002-06-04
申请人： Andrew W. Krone , Timothy J. Dupuis , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
发明人： Andrew W. Krone , Timothy J. Dupuis , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
IPC分类号： H04B1/38 , H04B15/00
CPC分类号： H04M1/573 , H04L7/033 , H04L25/0266 , H04L25/06 , H04M11/06 , H04M19/001 , H04M19/02
摘要： An improved digital capacitive isolation barrier system is provided that is suitable for use in a telephone or modem where the locally powered circuits must be effectively isolated from the public telephone system, while permitting data transfer across the barrier. In particular, an automatic ADC offset calibration system is provided for determining the magnitude of the ADC offset signal required in the system during a calibration operation, and for providing the calibrated ADC offset signal during normal operation of the isolation barrier system. A modified hybrid circuit is provided for isolating the system input from the telephone line during calibration, and for completing the calibration loop. Fixed bias signals are also provided for the ADC and for a DAC in the system. In a preferred embodiment, the ADC is located on the isolated side of the isolation barrier, while the integrator and register that determine and hold the offset signal are located on the powered side of the isolation barrier.

14. 发明授权

US07003023B2 Digital isolation system with ADC offset calibration 失效
标题翻译：具有ADC偏移校准的数字隔离系统
公开(公告)号：US07003023B2
公开(公告)日：2006-02-21
申请号：US10672259
申请日：2003-09-26
申请人： Andrew W. Krone , Timothy J. Dupuis , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
发明人： Andrew W. Krone , Timothy J. Dupuis , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
IPC分类号： H04B1/38
CPC分类号： H04M1/573 , H04L7/033 , H04L25/0266 , H04L25/06 , H04M11/06 , H04M19/001 , H04M19/02
摘要： An improved digital capacitive isolation barrier system is provided that is suitable for use in a telephone or modem where the locally powered circuits must be effectively isolated from the public telephone system, while permitting data transfer across the barrier. In particular, an automatic ADC offset calibration system is provided for determining the magnitude of the ADC offset signal required in the system during a calibration operation, and for providing the calibrated ADC offset signal during normal operation of the isolation barrier system. A modified hybrid circuit is provided for isolating the system input from the telephone line during calibration, and for completing the calibration loop. Fixed bias signals are also provided for the ADC and for a DAC in the system. In a preferred embodiment, the ADC is located on the isolated side of the isolation barrier, while the integrator and register that determine and hold the offset signal are located on the powered side of the isolation barrier.
摘要翻译：提供了一种改进的数字电容隔离屏障系统，其适用于电话或调制解调器，其中本地供电的电路必须与公共电话系统有效地隔离，同时允许跨屏障的数据传输。特别地，提供了一种自动ADC偏移校准系统，用于在校准操作期间确定系统中所需的ADC偏移信号的幅度，并在隔离屏障系统的正常操作期间提供校准的ADC偏移信号。提供了一种改进的混合电路，用于在校准期间隔离来自电话线的系统输入，并用于完成校准循环。还为ADC和系统中的DAC提供固定偏置信号。在优选实施例中，ADC位于隔离屏障的隔离侧，而确定和保持偏移信号的积分器和寄存器位于隔离屏障的动力侧。

15. 发明授权

US06959083B2 Loop current monitor circuitry and method for a communication system 失效
标题翻译：环路电流监测电路和通信系统的方法
公开(公告)号：US06959083B2
公开(公告)日：2005-10-25
申请号：US10610136
申请日：2003-06-30
申请人： Jeffrey W. Scott , Andrew W. Krone , Navdeep S. Sooch , David R. Welland
发明人： Jeffrey W. Scott , Andrew W. Krone , Navdeep S. Sooch , David R. Welland
IPC分类号： H03M1/42 , H04L7/033 , H04L25/02 , H04L25/06 , H04M1/57 , H04M11/06 , H04M19/00 , H04M19/02 , H04M1/738
CPC分类号： H04M1/573 , H04L7/033 , H04L25/0266 , H04L25/06 , H04M11/06 , H04M19/001 , H04M19/02
摘要： An audio signal processor which modifies audio signal components outside the conventional audio frequency band. The processor includes a Delta Sigma Modulator (DSM) that receives a non-interpolated digital audio signal sampled at a frequency of at least 198 kHz.
摘要翻译：音频信号处理器，其修改常规音频频带外的音频信号分量。该处理器包括一个ΔΣ调制器（DSM），其接收以至少198kHz的频率采样的非内插数字音频信号。

16. 发明授权

US06442213B1 Digital isolation system with hybrid circuit in ADC calibration loop 失效
公开(公告)号：US06442213B1
公开(公告)日：2002-08-27
申请号：US09035180
申请日：1998-03-04
申请人： Andrew W. Krone , Timothy J. Dupuis , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
发明人： Andrew W. Krone , Timothy J. Dupuis , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
IPC分类号： H03M106
CPC分类号： H04M1/573 , H04L7/033 , H04L25/0266 , H04L25/06 , H04M11/06 , H04M19/001 , H04M19/02
摘要： An improved digital capacitive isolation barrier system is provided that is suitable for use in a telephone or modem where the locally powered circuits must be effectively isolated from the public telephone system, while permitting data transfer across the barrier. In particular, an automatic ADC offset calibration system is provided for determining the magnitude of the ADC offset signal required in the system during a calibration operation, and for providing the calibrated ADC offset signal during normal operation of the isolation barrier system. A modified hybrid circuit is provided for isolating the system input from the telephone line during calibration, and for completing the calibration loop. Fixed bias signals are also provided for the ADC and for a DAC in the system. In a preferred embodiment, the ADC is located on the isolated side of the isolation barrier, while the integrator and register that determine and hold the offset signal are located on the powered side of the isolation barrier.

17. 发明授权

US06359983B1 Digital isolation system with data scrambling 失效
标题翻译：数字隔离系统与数据扰乱
公开(公告)号：US06359983B1
公开(公告)日：2002-03-19
申请号：US09034687
申请日：1998-03-04
申请人： Andrew W. Krone , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
发明人： Andrew W. Krone , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
IPC分类号： H04M100
CPC分类号： H04L25/06 , H04L7/033 , H04L25/0266 , H04M1/573 , H04M11/06 , H04M19/001 , H04M19/02
摘要： A method and apparatus are provided for reducing the amplitude of signals that often are inadvertently coupled to a telephone line from an isolation barrier system, or that cause undesirable interference within the circuitry of the isolation barrier system. Such signals have undesirable peaks in the frequency domain (spectral peaks) due to the existence of periodicities in the data signal that is transmitted across the isolation barrier. Such spectral peaks are reduced by this invention, which comprises randomizing or scrambling the data signal before it crosses the isolation barrier, and descrambling the data after it has crossed the isolation barrier. In one embodiment, the data signal is scrambled by combining it with a random bit stream (or a pseudo random bit stream), which effectively “whitens” the resulting scrambled signal, thus removing spectral peaks that exist in the original data signal. After the scrambled signal passes across the isolation barrier, it is descrambled by reversing the original scrambling operation. In preferred embodiments, both the scrambling and the descrambling steps are performed by combining the incoming signal with synchronized pseudo-random bit patterns using “exclusive-or” logical operations.
摘要翻译：提供了一种方法和装置，用于减少经常由隔离屏障系统偶然耦合到电话线路的信号的幅度，或者导致隔离屏障系统的电路内的不期望的干扰。由于在跨隔离屏障传输的数据信号中存在周期性，这样的信号在频域（频谱峰值）中具有不期望的峰值。通过本发明减少了这种频谱峰值，其包括在数据信号穿过隔离屏障之前随机化或加扰数据信号，并且在数据跨越隔离屏障之后对其进行解扰。在一个实施例中，通过将数据信号与随机比特流（或伪随机比特流）组合来加扰数据信号，这有效地“产生”所产生的加扰信号，从而消除原始数据信号中存在的谱峰。在加扰的信号通过隔离屏障之后，通过反转原始的加扰操作来解扰。在优选实施例中，通过使用“异或”逻辑运算将输入信号与同步伪随机位模式组合来执行加扰和解扰步骤。

18. 发明授权

US06289070B1 Digital isolation system with ADC offset calibration including coarse offset 失效
标题翻译：具有ADC偏移校准的数字隔离系统，包括粗略偏移
公开(公告)号：US06289070B1
公开(公告)日：2001-09-11
申请号：US09034425
申请日：1998-03-04
申请人： Andrew W. Krone , Timothy J. Dupuis , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
发明人： Andrew W. Krone , Timothy J. Dupuis , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
IPC分类号： H04L2300
CPC分类号： H04L25/06 , H04L7/033 , H04L25/0266 , H04M1/573 , H04M11/06 , H04M19/001 , H04M19/02
摘要： A digital capacitive isolation barrier system is provided that is suitable for use in a telephone or modem where the locally powered circuits must be effectively isolated from the public telephone system, while permitting data transfer across the barrier. In particular, an automatic ADC offset calibration system is provided for determining the magnitude of the ADC offset signal required in the system during a calibration operation, and for providing the ADC offset signal during normal operation of the isolation barrier system. The offset calibration system includes a coarse offset signal generator which provides ;elected increments of offset voltage to the ADC outside of the outgoing data signal channel, In order to increase the calibration range and to avoid injecting large offset voltages into the outgoing data channel. Fixed bias signals are also provided for the ADC and for a DAC in the system. In a preferred embodiment, the ADC is located on the isolated side of the isolation barrier, while the integrator and register that determine and hold the offset signal are located on the powered side of the isolation barrier.
摘要翻译：提供了一种适用于电话或调制解调器的数字电容隔离屏障系统，其中本地供电的电路必须与公共电话系统有效地隔离，同时允许跨屏障的数据传输。特别地，提供了自动ADC偏移校准系统，用于在校准操作期间确定系统中所需的ADC偏移信号的大小，以及用于在隔离屏障系统的正常操作期间提供ADC偏移信号。偏移校准系统包括一个粗略的偏移信号发生器，它为输出数据信号通道之外的ADC提供偏移电压的选择增量，以增加校准范围，并避免在输出数据通道中注入大的失调电压。还为ADC和系统中的DAC提供固定偏置信号。在优选实施例中，ADC位于隔离屏障的隔离侧，而确定和保持偏移信号的积分器和寄存器位于隔离屏障的动力侧。

19. 发明授权

US06323796B1 Digital isolation system with ADC offset calibration 有权
标题翻译：具有ADC偏移校准的数字隔离系统
公开(公告)号：US06323796B1
公开(公告)日：2001-11-27
申请号：US09516898
申请日：2000-03-01
申请人： Andrew W. Krone , Timothy J. Dupuis , Jeffery W. Scott , Navdeep S. Sooch , David R. Welland
发明人： Andrew W. Krone , Timothy J. Dupuis , Jeffery W. Scott , Navdeep S. Sooch , David R. Welland
IPC分类号： H03M302
CPC分类号： H04L25/06 , H03M3/384 , H03M3/458 , H04L7/033 , H04L25/0266 , H04M1/573 , H04M11/06 , H04M19/001 , H04M19/02
摘要： A digital capacitive isolation barrier system is provided that is suitable for use in a telephone or modem where the locally powered circuits must be effectively isolated from the public telephone system, while permitting data transfer across the barrier. In particular, an automatic ADC offset calibration system is provided for determining the magnitude of the ADC offset signal required in the system during a calibration operation, and for providing the ADC offset signal during normal operation of the isolation barrier system. Fixed bias signals are also provided for the ADC and for a DAC in the system. In a preferred embodiment, the ADC is located on the isolated side of the isolation barrier, while the integrator and register that determine and hold the offset signal are located on the powered side of the isolation barrier.
摘要翻译：提供了一种适用于电话或调制解调器的数字电容隔离屏障系统，其中本地供电的电路必须与公共电话系统有效地隔离，同时允许跨屏障的数据传输。特别地，提供了自动ADC偏移校准系统，用于在校准操作期间确定系统中所需的ADC偏移信号的大小，以及用于在隔离屏障系统的正常操作期间提供ADC偏移信号。还为ADC和系统中的DAC提供固定偏置信号。在优选实施例中，ADC位于隔离屏障的隔离侧，而确定和保持偏移信号的积分器和寄存器位于隔离屏障的动力侧。

20. 发明授权

US07283584B2 Direct digital access arrangement circuitry and method for connecting to phone lines 失效
公开(公告)号：US07283584B2
公开(公告)日：2007-10-16
申请号：US10780142
申请日：2004-02-17
申请人： Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
发明人： Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
IPC分类号： H04B1/38 , H04L5/16
CPC分类号： H04M1/573 , H04L7/033 , H04L25/0266 , H04L25/06 , H04M1/76 , H04M3/007 , H04M11/06 , H04M19/001 , H04M19/02
摘要： An isolation system is provided that is suitable for use in telephony, medical instrumentation, industrial process control and other applications. Preferred embodiments of the invention comprise a capacitive isolation barrier across which a digital signal is communicated. The system provides a means of communication across the isolation barrier that is highly immune to amplitude and phase noise interference. Clock recovery circuitry may be employed on one side of the isolation barrier to extract timing information from the digital signal communicated across the barrier, and to filter the effects of phase noise introduced at the barrier. Delta-sigma converters may be disposed on both sides of the isolation barrier to convert signals between analog and digital domains. An isolated power supply may also be provided on the isolated side of the barrier, whereby direct current is generated in response to the digital data received across the isolation barrier. Finally, a bidirectional isolation system is provided whereby bidirectional communication of digital signals is accomplished using a single pair of isolation capacitors. In preferred embodiments, the digital data communicated across the barrier consists of digital delta-sigma data signals multiplexed in time with other digital control, signaling and framing information.

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