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公开(公告)号：US10598700B2
公开(公告)日：2020-03-24
申请号：US15395789
申请日：2016-12-30
发明人： Arup Polley , Srinath Ramaswamy , Baher S. Haroun
摘要： One example includes a current measurement system. The system includes at least two magnetic field sensors positioned proximal to and in a predetermined arrangement with respect to a current conductor, each of the magnetic field sensors being configured to measure magnetic field associated with a current flowing in the current conductor and provide respective magnetic field measurements. The system also includes a current measurement processor configured to implement a mathematical algorithm based on a Taylor series expansion of the magnetic field measurements to calculate an amplitude of the current based on the mathematical algorithm.
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2.发明申请公开(公告)号：US20190288122A1
公开(公告)日：2019-09-19
申请号：US16501731
申请日：2019-05-28
发明人： Archana Venugopal , Luigi Colombo , Arup Polley
IPC分类号： H01L29/786 , H01L29/16 , H01L21/02 , H01L29/20 , H01L29/267 , H01L27/092 , H01L21/8258 , H01L29/66 , H01L29/45 , H01L29/49
摘要： A microelectronic device includes a gated graphene component over a semiconductor material. The gated graphene component includes a graphitic layer having at least one layer of graphene. The graphitic layer has a channel region, a first connection and a second connection make electrical connections to the graphitic layer adjacent to the channel region. The graphitic layer is isolated from the semiconductor material. A backgate region having a first conductivity type is disposed in the semiconductor material under the channel region. A first contact field region and a second contact field region are disposed in the semiconductor material under the first connection and the second connection, respectively. At least one of the first contact field region and the second contact field region has a second, opposite, conductivity type. A method of forming the gated graphene component in the microelectronic device with a transistor is disclosed.
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公开(公告)号：US10082527B2
公开(公告)日：2018-09-25
申请号：US14941319
申请日：2015-11-13
CPC分类号： G01R15/20 , G01R19/0053 , G01R19/0092
摘要： A system for measuring current includes a conductive trace comprising N substantially parallel straight sections having a substantially constant cross-section, N≥4. Adjacent substantially straight sections are spaced apart by a given distance and each pair of adjacent straight sections is connected by a respective loop of the current trace such that current in odd-numbered straight sections flows in a first direction and current in even-numbered straight sections flows in an opposite direction. The N magnetic field based current sensors are each positioned on a respective straight section of the conductive trace. The current is calculated based on ( S ( 1 ) - ( N - 1 1 ) S ( 2 ) + ( N - 1 2 ) S ( 3 ) - … - ( N - 1 N - 3 ) S ( N - 2 ) + ( N - 1 N - 2 ) S ( N - 1 ) - S ( N ) ) 2 ( N - 1 ) ; ( M k ) = M ! ( M - k ) ! k ! ; where M=N−1, and S(i) is the measured signal read at magnetic field based current sensor i.
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公开(公告)号：US09810759B2
公开(公告)日：2017-11-07
申请号：US14995521
申请日：2016-01-14
CPC分类号： G01R35/005 , G01N1/00 , G01N2201/00 , G01R33/0035 , G01R33/07 , H04J1/00
摘要： A closed-loop calibration scheme is configured to allow a device to remain in continuous operation. A signal generator device provides a pseudorandom sequence for a signal received by a magnetic field magnetic field sensor, such as a Hall-effect sensor. A signal decoder circuit receives the output signal and decouples the generated spread spectrum signal from the interference by measuring the gain in the overall signal. The decoder device distinguishes the known spread spectrum signal from any perturbation effects of particular bandwidths. A processing circuit then outputs a signal that has an operation parameter that has been adjusted to compensate for the perturbation effects. The processing circuit provides the receiver circuit with the compensation signal, hence forming a closed-loop calibration configuration.
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公开(公告)号：US09778288B2
公开(公告)日：2017-10-03
申请号：US14986121
申请日：2015-12-31
CPC分类号： G01R15/185 , G01R15/207 , G01R19/0092 , G01R33/04
摘要： Operating a current sensor by conducting a current serially through a first region and a second region of an electrically conductive member. A first magnetic field produced by the current in the first region is sensed using a first magnetic field based current (MFBC) sensor having a first sensitivity. The sensitivity of a second MFBC is reduced. A second magnetic field produced by the current in the second region is sensed using the second MFBC sensor having a reduced sensitivity, in which the reduced sensitivity is lower than the first sensitivity. A magnitude of the current is calculated based on the first magnetic field and the second magnetic field. A dynamic range of the current sensor is extended by calculating a magnitude of the current using the second magnetic field after the first MFBC is saturated.
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6.发明申请Methods and Apparatus for Reducing Noise, Power and Settling Time in Multi-Modal Analog Multiplexed Data Acquisition Systems 有权用于降低多模态模拟多路复用数据采集系统中噪声，功率和稳定时间的方法和装置公开(公告)号：US20160380660A1
公开(公告)日：2016-12-29
申请号：US15084052
申请日：2016-03-29
发明人： Arup Polley , Ajit Sharma , Seung Bae Lee , Sriram Narayanan , Srinath Ramaswamy
IPC分类号： H04B1/10
CPC分类号： H04B1/1036 , H04B1/0028 , H04B2001/1054
摘要： Reduced noise and power with rapid settling time and increased performance in multi-modal analog multiplexed data acquisition systems. An example apparatus arrangement includes a circuit input configured to receive a plurality of analog input signals; an analog to digital converter circuit configured to output a digital representation of an analog voltage; a selection circuit configured to select one of the analog input signals received at the circuit input; a buffer coupled to receive the selected one of the analog input signals; a filter coupled to the buffer and configured to perform a high bandwidth sample operation and a low bandwidth sample operation and having a filter output, responsive to a control signal; and a sampling capacitor coupled to the filter to sample the filter output, and having an output coupled to the analog to digital converter. Methods and additional apparatus arrangements are disclosed.
摘要翻译： 在多模式模拟复用数据采集系统中，通过快速建立时间和更高性能降低噪声和功耗。 示例性装置配置包括被配置为接收多个模拟输入信号的电路输入; 模数转换器电路，被配置为输出模拟电压的数字表示; 选择电路，被配置为选择在所述电路输入处接收的所述模拟输入信号之一; 耦合以接收所选择的一个模拟输入信号的缓冲器; 滤波器，耦合到所述缓冲器并且被配置为响应于控制信号执行高带宽采样操作和低带宽采样操作并具有滤波器输出; 以及耦合到所述滤波器以对所述滤波器输出进行采样并且具有耦合到所述模数转换器的输出的采样电容器。 公开了方法和附加装置布置。
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公开(公告)号：US09742420B2
公开(公告)日：2017-08-22
申请号：US14954577
申请日：2015-11-30
发明人： Sriram Narayanan , Srinath Ramaswamy , Arup Polley , Ajit Sharma
CPC分类号： H03M1/0609 , H03M1/001 , H03M1/002 , H03M1/1295 , H03M1/162
摘要： An analog to digital converter (ADC) system that includes a first amplifier configured to amplify an analog input signal to produce an amplified direct current (DC) signal, an ADC configured to receive the amplified DC signal and convert the amplified DC signal into a digital DC signal, a digital to analog converter configured to receive the digital DC signal and convert the digital DC signal into an analog DC signal, and a second amplifier configured to receive an analog alternating current (AC) signal comprising the analog DC signal subtracted from the analog input signal and amplify the analog AC signal to produce an amplified AC signal. The ADC is further configured to receive the amplified AC signal and produce a digital AC signal. The second amplifier has a gain greater than a gain of the first amplifier.
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公开(公告)号：US09717426B2
公开(公告)日：2017-08-01
申请号：US14837179
申请日：2015-08-27
发明人： Ajit Sharma , Sriram Narayanan , Srinath Mathur Ramaswamy , Arup Polley , Seung Bae Lee , Wen Li
CPC分类号： A61B5/02427 , A61B5/6826 , A61B5/7228 , A61B2562/0238
摘要： The circuitry of an optical receiver reduces the ambient DC component and the pleth DC component to leave a pleth signal with substantially only a pleth AC component. The circuitry also provides gain control and can provide transmit power control to change the range of the pleth AC component to occupy a desired input range of an analog-to-digital converter.
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公开(公告)号：US09615427B1
公开(公告)日：2017-04-04
申请号：US14954618
申请日：2015-11-30
发明人： Sriram Narayanan , Srinath Ramaswamy , Arup Polley , Ajit Sharma
IPC分类号： H05B37/02 , A61B5/00 , H05B33/08 , A61B5/024 , A61B5/1455
CPC分类号： H05B37/0218 , A61B5/02416 , A61B5/14551 , A61B5/7203 , H05B33/0854 , H05B37/0281 , Y02B20/46
摘要： An optical system includes an optical illumination source, an optical receiver, a correlation determination circuit, and an ambient condition control circuit. The optical illumination source is configured to emit a light in the direction of a target object. The optical receiver is configured to receive a combined optical signal that includes an ambient light component combined with an interrogation component. The correlation determination circuit is configured to compare the combined optical signal with an ambient light signal to identify a correlation factor. The ambient condition control circuit is configured to compare the correlation factor to a low correlation threshold value and a high correlation threshold value, and, based on the correlation factor exceeding the low threshold value and being less than the high correlation threshold value, cancel the ambient light component from the combined optical signal to produce an interrogation signal including the interrogation component.
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10.发明申请Methods and Apparatus for Magnetic Sensor with Integrated Calibration Mechanism 有权具有集成校准机制的磁传感器的方法和装置公开(公告)号：US20170067980A1
公开(公告)日：2017-03-09
申请号：US14848731
申请日：2015-09-09
CPC分类号： G01R33/093 , G01R33/0035
摘要： Methods and apparatus for magnetic sensors and integrated calibration. In an example arrangement, a system includes a magnetic sensor configured to output a signal corresponding to magnetic fields; a calibration trace disposed proximal to the magnetic sensor; a controlled current source coupled to the calibration trace and configured to output a current resulting in a magnetic field output from the calibration trace; and a comparator coupled to the output signal from the magnetic sensor and to an expected signal. In the example arrangement, the comparator outputs a signal indicating whether the output signal from the magnetic sensor corresponds to the expected signal. Methods are also disclosed.
摘要翻译： 磁传感器和集成校准的方法和装置。 在一个示例性配置中，系统包括：一个磁传感器，被配置为输出对应于磁场的信号; 设置在所述磁传感器附近的校准轨迹; 耦合到所述校准轨迹并被配置为输出导致从所述校准轨迹输出的磁场的电流的受控电流源; 以及耦合到来自磁传感器的输出信号和预期信号的比较器。 在该示例性配置中，比较器输出指示来自磁传感器的输出信号是否对应于预期信号的信号。 还公开了方法。
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