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公开(公告)号：US08710904B2
公开(公告)日：2014-04-29
申请号：US13728959
申请日：2012-12-27
Applicant: Texas Instruments Incorporated
Inventor： Arup Polley
IPC: G11C5/14
CPC classification number: G11C5/147 , H03H11/02 , H03H11/245
Abstract: Apparatus and methods disclosed herein implement a MOS resistor using the current channel of a MOS transistor. The MOS resistance R(DS) is dependent upon MOS transistor geometry and nominal gate voltage. MOS resistor terminal-to-gate voltages are averaged and applied to the MOS transistor gate such as to maintain the MOS resistor terminal voltage to current ratio, resulting in a substantially constant R(DS). R(DS) is also compensated for temperature and process variations by adjusting gate voltages via negative feedback methods.
Abstract translation: 本文公开的装置和方法使用MOS晶体管的电流通道实现MOS电阻器。 MOS电阻R（DS）取决于MOS晶体管的几何形状和标称栅极电压。 将MOS电阻端子对栅极电压平均化并施加到MOS晶体管栅极，以将MOS电阻端子电压保持为电流比，导致基本上恒定的R（DS）。 还通过负反馈方法调整栅极电压来补偿R（DS）的温度和工艺变化。
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公开(公告)号：US11567107B2
公开(公告)日：2023-01-31
申请号：US17138977
申请日：2020-12-31
Applicant: Texas Instruments Incorporated
Inventor： Arup Polley , Srinath M. Ramaswamy , Baher S. Haroun
IPC: G01R15/20
Abstract: A system comprises first and second Hall-effect sensors and an amplifier. The first Hall-effect sensor has a first bias current direction parallel to a first direction, a pair of first bias input terminals spaced along the first direction, and a pair of first sense output terminals spaced along an orthogonal second direction. The second Hall-effect sensor has a second bias current direction parallel to the second direction, a pair of second bias input terminals spaced along the second direction, and a pair of second sense output terminals connected out of phase with the first sense terminals. The amplifier has a pair of amplifier input terminals coupled to the first and second sense terminals.
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公开(公告)号：US11002563B2
公开(公告)日：2021-05-11
申请号：US16844547
申请日：2020-04-09
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Arup Polley , Srinath Ramaswamy , Baher S. Haroun , Rajarshi Mukhopadhyay
Abstract: A first amplifier has an input to receive a Hall-signal output current from a first Hall element and has an output to output feedback current in response to the received Hall-signal output current. The Hall-signal output current is impeded by an impedance of the first Hall element. The feedback current is coupled to counterpoise the Hall-signal output current at the input, and a voltage at the output is an amplified Hall output signal. A second amplifier generates a high-frequency portion output signal in response to a difference between the amplified Hall output signal and a Hall-signal output signal from a second Hall element. A filter reduces high-frequency content of the high-frequency portion output signal and generates an offset correction signal. A third amplifier generates a corrected Hall signal in response to a difference between the amplified Hall output signal and the offset correction signal.
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公开(公告)号：US10698066B2
公开(公告)日：2020-06-30
申请号：US15952521
申请日：2018-04-13
Applicant: Texas Instruments Incorporated
Inventor： Arup Polley , Srinath Ramaswamy , Baher S. Haroun
Abstract: In described examples, a Hall effect sensor includes a primary Hall effect sensor element and an auxiliary Hall effect sensor element. A known magnetic field is applied to the auxiliary Hall effect sensor to produce an auxiliary Hall voltage used in a feedback loop to control the bias current of the auxiliary Hall effect sensor to maintain the auxiliary Hall voltage approximately constant over a range of temperature and other factors. A bias current for the primary Hall effect sensor is controlled to track the bias current of the auxiliary Hall effect sensor to maintain the sensitivity of the primary Hall effect sensor approximately constant over the same range of temperature and other factors.
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公开(公告)号：US20190317175A1
公开(公告)日：2019-10-17
申请号：US15952521
申请日：2018-04-13
Applicant: Texas Instruments Incorporated
Inventor： Arup Polley , Srinath Ramaswamy , Baher S. Haroun
Abstract: In described examples, a Hall effect sensor includes a primary Hall effect sensor element and an auxiliary Hall effect sensor element. A known magnetic field is applied to the auxiliary Hall effect sensor to produce an auxiliary Hall voltage used in a feedback loop to control the bias current of the auxiliary Hall effect sensor to maintain the auxiliary Hall voltage approximately constant over a range of temperature and other factors. A bias current for the primary Hall effect sensor is controlled to track the bias current of the auxiliary Hall effect sensor to maintain the sensitivity of the primary Hall effect sensor approximately constant over the same range of temperature and other factors.
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Patent Agency Ranking
26.发明授权公开(公告)号：US10304967B1
公开(公告)日：2019-05-28
申请号：US15910854
申请日：2018-03-02
Applicant: Texas Instruments Incorporated
Inventor： Archana Venugopal , Luigi Colombo , Arup Polley
IPC: H01L31/0312 , H01L29/786 , H01L29/20 , H01L29/267 , H01L29/49 , H01L29/45 , H01L29/66 , H01L21/02 , H01L21/8258 , H01L27/092 , H01L29/16
Abstract: 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：US10069065B2
公开(公告)日：2018-09-04
申请号：US14676233
申请日：2015-04-01
Applicant: Texas Instruments Incorporated
Inventor： Arup Polley , Archana Venugopal , Robert Reid Doering , Luigi Colombo
Abstract: Graphene Hall sensors, magnetic sensor systems and methods for sensing a magnetic field using an adjustable gate voltage to adapt the Hall sensor magnetic field sensitivity according to a control input for environmental or process compensation and/or real-time adaptation for balancing power consumption and minimum detectable field performance. The graphene Hall sensor gate voltage can be modulated and the sensor output signal can be demodulated to combat flicker or other low frequency noise. Also, graphene Hall sensors can be provided with capacitive coupled contacts for reliable low impedance AC coupling to instrumentation amplifiers or other circuits using integral capacitance.
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公开(公告)号：US10001529B2
公开(公告)日：2018-06-19
申请号：US14936631
申请日：2015-11-09
Applicant: Texas Instruments Incorporated
Inventor： Arup Polley , Archana Venugopal , Luigi Colombo , Robert R. Doering
CPC classification number: G01R33/07 , G01R33/0029 , G01R33/0041 , G01R33/075 , G01R33/1284 , H01L43/04 , H01L43/06 , H01L43/10
Abstract: A Graphene Hall sensor (GHS) is provided with a modulated gate bias signal in which the modulated gate bias signal alternates at a modulation frequency between a first voltage that produces a first conductivity state in the GHS and a second voltage that produces approximately a same second conductivity state in the GHS. A bias current is provided through a first axis of the GHS. A resultant output voltage signal is provided across a second axis of the Hall sensor that includes a modulated Hall voltage and an offset voltage, in which the Hall voltage is modulated at the modulation frequency. An amplitude of the Hall voltage that does not include the offset voltage is extracted from the resultant output voltage signal.
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公开(公告)号：US20170192078A1
公开(公告)日：2017-07-06
申请号：US14995521
申请日：2016-01-14
Applicant: Texas Instruments Incorporated
Inventor： Arup Polley , Russell Melvin Rosenquist , Terry Lee Sculley
CPC classification number: G01R35/005 , G01N1/00 , G01N2201/00 , G01R33/0035 , G01R33/07 , H04J1/00
Abstract: 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：US20170059627A1
公开(公告)日：2017-03-02
申请号：US14986121
申请日：2015-12-31
Applicant: Texas Instruments Incorporated
Inventor： Arup Polley , Srinath Ramaswamy , Terry Lee Sculley
CPC classification number: G01R15/185 , G01R15/207 , G01R19/0092 , G01R33/04
Abstract: 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.
Abstract translation: 通过串联地导通电流通过导电构件的第一区域和第二区域来操作电流传感器。 使用具有第一灵敏度的第一基于磁场的电流（MFBC）传感器来感测由第一区域中的电流产生的第一磁场。 第二MFBC的灵敏度降低。 使用具有降低的灵敏度的第二MFBC传感器来感测由第二区域中的电流产生的第二磁场，其中灵敏度降低到低于第一灵敏度。 基于第一磁场和第二磁场计算电流的大小。 通过在第一MFBC饱和之后计算使用第二磁场的电流的幅度来扩展电流传感器的动态范围。
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