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1.发明授权Testing of mixed signal integrated circuits generating analog signals from digital data elements 有权测试从数字数据元件产生模拟信号的混合信号集成电路公开(公告)号：US06933868B1
公开(公告)日：2005-08-23
申请号：US10708415
申请日：2004-03-02
申请人： Amit Premy , Ganesan Thiagarajan
发明人： Amit Premy , Ganesan Thiagarajan
IPC分类号： G01R31/3167 , G01R31/3187 , H03M1/10 , H04B17/00
CPC分类号： G01R31/3187 , G01R31/3167 , H04B17/0085
摘要： Testing of a mixed signal integrated circuit (IC) potentially in the form of a die using a tested/calibrated integrated circuit. In an embodiment, the mixed signal IC generates an analog signal from a symbol, and transmits the analog signal to the calibrated integrated circuit. The calibrated IC determines a valid symbol corresponding to the signal level (e.g., voltage) of the received analog signal, and determines a deviation of the signal level of the received analog signal from the voltage level corresponding to the valid symbol. The deviation is deemed to represent the degree of defect of the mixed signal IC based on the assumption that the calibrated IC operates accurately. The deviation is used to either discard or qualify/accept the mixed signal IC.
摘要翻译： 使用测试/校准的集成电路测试可能采用模具形式的混合信号集成电路（IC）。 在一个实施例中，混合信号IC从符号生成模拟信号，并将模拟信号发送到校准的集成电路。 校准的IC确定对应于所接收的模拟信号的信号电平（例如电压）的有效符号，并且确定接收到的模拟信号的信号电平与对应于有效符号的电压电平的偏差。 基于校准的IC精确地操作的假设，该偏差被认为表示混合信号IC的缺陷程度。 该偏差用于丢弃或限定/接受混合信号IC。
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2.发明授权Selecting one of multiple antennas to receive signals in a wireless packet network 有权选择多个天线之一以在无线分组网络中接收信号公开(公告)号：US07352801B2
公开(公告)日：2008-04-01
申请号：US10708552
申请日：2004-03-10
IPC分类号： H04B1/00
CPC分类号： H04B7/0808
摘要： Selecting one of multiple antennas to receive signals in a wireless packet network. Correlation value and gain needed to boost the signal up to a desired power (or the signal strength of the received signal) are determined for each antenna by examining the non-payload portion (e.g., preamble) of the packet. The antenna with the best SNR is then chosen based on the rule given. In an embodiment, the correlation value is determined based on the Barker Sequence employed for each bit in the preamble. The selection may be performed for each data packet, thereby using the antenna receiving the signal most conducive to recovery of the data bits (including payload) in each data packet.
摘要翻译： 选择多个天线之一以在无线分组网络中接收信号。 通过检查分组的非有效载荷部分（例如，前导码），为每个天线确定将信号升高到期望功率所需的相关值和增益（或接收信号的信号强度）。 然后根据给出的规则选择具有最佳SNR的天线。 在一个实施例中，基于用于前同步码中的每个位的Barker序列来确定相关值。 可以对每个数据分组执行选择，从而使用天线接收最有利于恢复每个数据分组中的数据比特（包括有效载荷）的信号。
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公开(公告)号：US20060282490A1
公开(公告)日：2006-12-14
申请号：US11506360
申请日：2006-08-18
申请人： Ganesan Thiagarajan
发明人： Ganesan Thiagarajan
IPC分类号： G06F7/38
CPC分类号： G06F1/03
摘要： A first phasor associated with an electronic signal and a delta phasor associated with a cyclic rate of the electronic signal are multiplied to produce a second phasor. To compensate for any deviation in the magnitude of the second phasor, a real and imaginary correction factor are determined and added to the second phasor. The imaginary and real correction factors can be determined by first calculating the sum and difference of the real and imaginary portions of the first phasor respectively. The sum and difference are then scaled by performing simple shift-operations to produce the real and imaginary correction factors. The corrected second phasor is then used to update the electronic signal, which in turn can be used to produce another signal, such as a communication signal.
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4.发明授权公开(公告)号：US08830106B2
公开(公告)日：2014-09-09
申请号：US13599491
申请日：2012-08-30
摘要： A method is provided. An analog signal is received. The analog input signal is compared to first and second reference signals to generate a first comparison result, and the first comparison result and a first time stamp corresponding to the first comparison result are registered. A first portion of a digital signal is generated from the first comparison result. At least one of the first and second reference signals is adjusted. A second comparison result is generated if the analog signal reaches an adjusted one of the first and second reference signals within a predetermined interval, and a second portion of the digital signal is generated from the second comparison result.
摘要翻译： 提供了一种方法。 接收模拟信号。 将模拟输入信号与第一和第二参考信号进行比较以产生第一比较结果，并且登记与第一比较结果对应的第一比较结果和第一时间戳。 从第一比较结果生成数字信号的第一部分。 调整第一和第二参考信号中的至少一个。 如果模拟信号在预定间隔内达到第一和第二参考信号中调整的一个，并且从第二比较结果产生数字信号的第二部分，则产生第二比较结果。
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公开(公告)号：US08754797B2
公开(公告)日：2014-06-17
申请号：US13599539
申请日：2012-08-30
摘要： An apparatus is provided. A comparison circuit is configured to receive an analog signal. A reference circuit is coupled to the comparison circuit and is configured to provide a plurality of reference signals to the comparison circuit. A conversion circuit is coupled to the comparison circuit and is configured to detect a change in the output of the comparison circuit. A time-to-digital converter (TDC) is coupled to the comparison circuit. A timer is coupled to the comparison circuit. A rate control circuit is coupled to the conversion circuit. An output circuit is coupled to the rate control circuit and the TDC, where the output circuit is configured to output at least one of a synchronous digital representation of the analog signal and an asynchronous digital representation of the analog signal.
摘要翻译： 提供了一种装置。 比较电路被配置为接收模拟信号。 参考电路耦合到比较电路，并被配置为向比较电路提供多个参考信号。 A转换电路耦合到比较电路，并被配置为检测比较电路的输出的变化。 时间数字转换器（TDC）耦合到比较电路。 定时器耦合到比较电路。 速率控制电路耦合到转换电路。 输出电路耦合到速率控制电路和TDC，其中输出电路被配置为输出模拟信号的同步数字表示和模拟信号的异步数字表示中的至少一个。
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公开(公告)号：US20140062734A1
公开(公告)日：2014-03-06
申请号：US13599452
申请日：2012-08-30
IPC分类号： H03M1/50
摘要： A method is provided. An analog signal is received. The analog input signal is compared to first and second reference signals to generate a first comparison result, and the first comparison result and a first time stamp corresponding to the first comparison result are registered. A first portion of a digital signal is generated from the first comparison result. If the comparison result remains substantially the same for a predetermined interval, an ADC is enabled to generate a second comparison result at a sampling instant. A second time stamp that corresponds to the sampling instant is generated. The second comparison result and a second time stamp corresponding to the first comparison result are registered, and a second portion of the digital signal is generated from the second comparison result.
摘要翻译： 提供了一种方法。 接收模拟信号。 将模拟输入信号与第一和第二参考信号进行比较以产生第一比较结果，并且登记与第一比较结果对应的第一比较结果和第一时间戳。 从第一比较结果生成数字信号的第一部分。 如果比较结果在预定间隔内保持基本相同，则ADC能够在采样时刻产生第二比较结果。 产生对应于采样时刻的第二时间戳。 登记与第一比较结果相对应的第二比较结果和第二时间戳，并且从第二比较结果生成数字信号的第二部分。
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公开(公告)号：US07240083B1
公开(公告)日：2007-07-03
申请号：US09966103
申请日：2001-10-01
申请人： Ganesan Thiagarajan
发明人： Ganesan Thiagarajan
IPC分类号： G06F1/02
CPC分类号： G06F1/03
摘要： A first phasor associated with an electronic signal and a delta phasor associated with a cyclic rate of the electronic signal are multiplied to produce a second phasor. To compensate for any deviation in the magnitude of the second phasor, a real and imaginary correction factor are determined and added to the second phasor. The imaginary and real correction factors can be determined by first calculating the sum and difference of the real and imaginary portions of the first phasor respectively. The sum and difference are then scaled by performing simple shift-operations to produce the real and imaginary correction factors. The corrected second phasor is then used to update the electronic signal, which in turn can be used to produce another signal, such as a communication signal.
摘要翻译： 将与电子信号相关联的第一相量和与电子信号的循环速率相关联的Δ相量相乘以产生第二相量。 为了补偿第二相量的大小的任何偏差，确定实数和虚数的校正因子并将其相加到第二相量。 可以通过首先计算第一相量的实部和虚部的和和差来确定虚数和实际校正因子。 然后通过执行简单的移位操作来缩放和差和产生实数和虚数的校正因子。 然后，校正的第二相量用于更新电子信号，电子信号又可以用于产生另一个信号，例如通信信号。
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公开(公告)号：US08760329B2
公开(公告)日：2014-06-24
申请号：US13599452
申请日：2012-08-30
摘要： A method is provided. An analog signal is received. The analog input signal is compared to first and second reference signals to generate a first comparison result, and the first comparison result and a first time stamp corresponding to the first comparison result are registered. A first portion of a digital signal is generated from the first comparison result. If the comparison result remains substantially the same for a predetermined interval, an ADC is enabled to generate a second comparison result at a sampling instant. A second time stamp that corresponds to the sampling instant is generated. The second comparison result and a second time stamp corresponding to the first comparison result are registered, and a second portion of the digital signal is generated from the second comparison result.
摘要翻译： 提供了一种方法。 接收模拟信号。 将模拟输入信号与第一和第二参考信号进行比较以产生第一比较结果，并且登记与第一比较结果对应的第一比较结果和第一时间戳。 从第一比较结果生成数字信号的第一部分。 如果比较结果在预定间隔内保持基本相同，则ADC能够在采样时刻产生第二比较结果。 产生对应于采样时刻的第二时间戳。 登记与第一比较结果相对应的第二比较结果和第二时间戳，并且从第二比较结果生成数字信号的第二部分。
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9.发明申请公开(公告)号：US20140062735A1
公开(公告)日：2014-03-06
申请号：US13599491
申请日：2012-08-30
IPC分类号： H03M1/34
摘要： A method is provided. An analog signal is received. The analog input signal is compared to first and second reference signals to generate a first comparison result, and the first comparison result and a first time stamp corresponding to the first comparison result are registered. A first portion of a digital signal is generated from the first comparison result. At least one of the first and second reference signals is adjusted. A second comparison result is generated if the analog signal reaches an adjusted one of the first and second reference signals within a predetermined interval, and a second portion of the digital signal is generated from the second comparison result.
摘要翻译： 提供了一种方法。 接收模拟信号。 将模拟输入信号与第一和第二参考信号进行比较以产生第一比较结果，并且登记与第一比较结果对应的第一比较结果和第一时间戳。 从第一比较结果生成数字信号的第一部分。 调整第一和第二参考信号中的至少一个。 如果模拟信号在预定间隔内达到第一和第二参考信号中调整的一个，并且从第二比较结果产生数字信号的第二部分，则产生第二比较结果。
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公开(公告)号：US07512646B2
公开(公告)日：2009-03-31
申请号：US11506360
申请日：2006-08-18
申请人： Ganesan Thiagarajan
发明人： Ganesan Thiagarajan
IPC分类号： G06F1/02
CPC分类号： G06F1/03
摘要： A first phasor associated with an electronic signal and a delta phasor associated with a cyclic rate of the electronic signal are multiplied to produce a second phasor. To compensate for any deviation in the magnitude of the second phasor, a real and imaginary correction factor are determined and added to the second phasor. The imaginary and real correction factors can be determined by first calculating the sum and difference of the real and imaginary portions of the first phasor respectively. The sum and difference are then scaled by performing simple shift-operations to produce the real and imaginary correction factors. The corrected second phasor is then used to update the electronic signal, which in turn can be used to produce another signal, such as a communication signal.
摘要翻译： 将与电子信号相关联的第一相量和与电子信号的循环速率相关联的Δ相量相乘以产生第二相量。 为了补偿第二相量的大小的任何偏差，确定实数和虚数的校正因子并将其相加到第二相量。 可以通过首先计算第一相量的实部和虚部的和和差来确定虚数和实际校正因子。 然后通过执行简单的移位操作来缩放和差和产生实数和虚数的校正因子。 然后，校正的第二相量用于更新电子信号，电子信号又可以用于产生另一个信号，例如通信信号。
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