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公开(公告)号：US20180372508A1
公开(公告)日：2018-12-27
申请号：US16056275
申请日：2018-08-06
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：US20180274957A1
公开(公告)日：2018-09-27
申请号：US15708553
申请日：2017-09-19
Applicant: Texas Instruments Incorporated
Inventor： Anand Dabak , Luis Reynoso Covarrubias , Srinath Ramaswamy , Srinivas Lingam
CPC classification number: G01F1/667 , G01F1/662 , G01F1/668 , G01F15/024 , H04B11/00
Abstract: Disclosed examples include methods and systems to measure fluid flow, including a transmit circuit to provide a transducer transmit signal based on a transmit pulse signal, a receive circuit to receive a transducer receive signal, an ADC to sample a receive signal from the receive circuit and provide a sampled signal, and a processing circuit that computes a transit time based on the sampled signal, and provides the transmit pulse signal including a first portion with a frequency in a first frequency band, and a second portion with a second frequency outside the first frequency band to mitigate undesired transducer vibration, where the second frequency is outside a transducer frequency bandwidth of the transducer.
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公开(公告)号：US20170363693A1
公开(公告)日：2017-12-21
申请号：US15186383
申请日：2016-06-17
Applicant: Texas Instruments Incorporated
Inventor： Arup Polley , Srinath Ramaswamy , Baher S. Haroun , Rajarshi Mukhopadhyay
CPC classification number: G01R33/0029 , G01R33/075 , H03F3/38 , H03F3/45995
Abstract: A high bandwidth Hall sensor includes a high bandwidth path and a low bandwidth path. The relatively high offset (from sensor offset) of the high bandwidth path is estimated using a relatively low offset generated by the low bandwidth path. The relatively high offset of the high bandwidth path is substantially reduced by combining the output of the high bandwidth path with the output of the low bandwidth path to generate a high bandwidth, low offset output. The offset can be further reduced by including transimpedance amplifiers in the high bandwidth sensors to optimize the frequency response of high bandwidth Hall sensor.
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公开(公告)号：US20170363445A1
公开(公告)日：2017-12-21
申请号：US15186394
申请日：2016-06-17
Applicant: Texas Instruments Incorporated
Inventor： Arup Polley , Srinath Ramaswamy , Baher S. Haroun , Rajarshi Mukhopadhyay
IPC: G01D5/14
CPC classification number: G01D5/142 , G01D3/0365 , G01D5/145
Abstract: A high bandwidth Hall sensor includes, for example, a Hall element for generating a first polarity Hall-signal output current. An amplifier receives, at a first input, the first polarity Hall-signal output current and outputs a feedback current of a second polarity opposite the first polarity in response. The feedback current is coupled to the first input, and the feedback current suppresses an instantaneous voltage generated by the first polarity first Hall element output current at the first input. In an embodiment, the feedback current suppresses the instantaneous voltage generated by first polarity Hall element output current such that the effects of the Hall element source impedance are reduced.
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公开(公告)号：US20170293526A1
公开(公告)日：2017-10-12
申请号：US15633835
申请日：2017-06-27
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Sai Zhang , Yuming Zhu , Clive Bittlestone , Srinath Ramaswamy
CPC classification number: G06F11/1068 , G06F3/0619 , G06F3/064 , G06F3/0673 , G06F11/1048 , G11C29/52 , H03M13/159 , H03M13/19 , H03M13/353 , H03M13/616
Abstract: A system for error correction code (ECC) management of write-once memory (WOM) codes includes, for example, a controller for selecting between one of a WOM (Write-Once Memory) mode and an ECC (error correction code) mode. A codec is arranged to operate in the selected mode. The codec while operating in the ECC mode is arranged to identify a bit position of at least one bit error in response to ECC parity bits of a first received data word. The codec while operating in the WOM mode is arranged to receive a WOM-encoded word from an addressed location in a WOM device, to receive a second received data word to be encoded and written to the addressed location, and to generate WOM-encoded word for writing to the addressed location in the WOM device. The WOM-encoded word for writing to the addressed location is optionally ECC encoded.
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Patent Agency Ranking
公开(公告)号：US20170099711A1
公开(公告)日：2017-04-06
申请号：US15131831
申请日：2016-04-18
Applicant: Texas Instruments Incorporated
Inventor： Arup Polley , Ajit Sharma , Srinath Ramaswamy , Sriram Narayanan
IPC: H05B33/08 , A61B5/1455 , A61B5/024
CPC classification number: H05B33/0818 , A61B5/02427 , A61B5/14551 , A61B5/7225 , Y02B20/346
Abstract: An LED (light-emitting diode) driver for a photoplethysmography system, including a switched-mode operational amplifier for driving a driver transistor with a source-drain path in series with the LED. In a first clock phase in which the LED is disconnected from the driver transistor, the amplifier is coupled in unity gain mode, and a sampling capacitor stores a voltage corresponding to the offset and flicker noise of the amplifier; the gate of the driver transistor is precharged to a reference voltage in this first clock phase. In a second clock phase, the sampled voltage at the capacitor is subtracted from the reference voltage applied to the amplifier input, so that the LED drive is adjusted according to the sampled noise. A signal from the transmitter channel is forwarded to a noise/ripple remover in the receiving channel, to remove transmitter noise from the received signal.
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公开(公告)号：US09356352B2
公开(公告)日：2016-05-31
申请号：US13657615
申请日：2012-10-22
Applicant: Texas Instruments Incorporated
Inventor： Eunyoung Seok , Srinath Ramaswamy , Brian B. Ginsburg , Vijay B. Rentala , Baher Haroun
CPC classification number: H01P11/001 , H01P5/08 , H01P5/107 , H01Q9/04 , H01Q9/0407 , H05K3/20 , H05K3/4038 , H05K3/4644 , Y10T29/49016
Abstract: An apparatus is provided. In the apparatus, there is an antenna package and an integrated circuit (IC). A circuit trace assembly is secured to the IC. A coupler (with an antenna assembly and a high impedance surface (HIS)) is secured to the circuit trace assembly. An antenna assembly has a window region, a conductive region that substantially surrounds the window region, a circular patch antenna that is in communication with the IC, and an elliptical patch antenna that is located within the window region, that is extends over at least a portion of the circular patch antenna, and that is in communication with the circular patch antenna. The HIS substantially surrounds the antenna assembly.
Abstract translation: 提供了一种装置。 在该装置中，存在天线封装和集成电路（IC）。 电路迹线组件固定到IC。 耦合器（具有天线组件和高阻抗表面（HIS））固定到电路迹线组件。 天线组件具有窗口区域，基本上围绕窗口区域的导电区域，与IC连通的圆形贴片天线以及位于窗口区域内的椭圆形贴片天线，其延伸至少一个 圆形贴片天线的一部分，并且与圆形贴片天线通信。 HIS基本上围绕天线组件。
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公开(公告)号：US20240111001A1
公开(公告)日：2024-04-04
申请号：US17956758
申请日：2022-09-29
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Preetinder Garcha , Srinath Ramaswamy , Viola Schaeffer
CPC classification number: G01R33/04 , G01R33/0017
Abstract: In some examples, an apparatus comprises a first coil, a second coil, a control circuit, and a processing circuit. The second coil is magnetically coupled to the first coil. The control circuit has a signal output coupled to the first coil, and a control output, and the control circuit configured to: responsive to a state of the control input, select a field strength level from a set of discrete field strength levels; and provide a first signal representing the selected field strength level at the signal output. Also, the processing circuit has processing inputs and a processing output, the processing inputs coupled to the second coil, the processing output coupled to the control input, and the processing circuit configured to, responsive to a second signal across the processing inputs, set a state of the processing output representing a polarity of a magnetic field sensed by the second coil.
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公开(公告)号：US11353347B2
公开(公告)日：2022-06-07
申请号：US15708553
申请日：2017-09-19
Applicant: Texas Instruments Incorporated
Inventor： Anand Dabak , Luis Reynoso Covarrubias , Srinath Ramaswamy , Srinivas Lingam
Abstract: Disclosed examples include methods and systems to measure fluid flow, including a transmit circuit to provide a transducer transmit signal based on a transmit pulse signal, a receive circuit to receive a transducer receive signal, an ADC to sample a receive signal from the receive circuit and provide a sampled signal, and a processing circuit that computes a transit time based on the sampled signal, and provides the transmit pulse signal including a first portion with a frequency in a first frequency band, and a second portion with a second frequency outside the first frequency band to mitigate undesired transducer vibration, where the second frequency is outside a transducer frequency bandwidth of the transducer.
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公开(公告)号：US11054520B2
公开(公告)日：2021-07-06
申请号：US15225134
申请日：2016-08-01
Applicant: Texas Instruments Incorporated
Inventor： Yuming Zhu , Srinath Ramaswamy , Domingo Garcia , Sujeet Milind Patole
Abstract: A transducer system with transducer and circuitry for applying a pulse train at a single frequency to excite the transducer. The transducer is operable to receive an echo waveform in response to the pulse train. The system also comprises circuitry for determining a time of flight as between a first reference time associated with the pulse train and a second reference time associated with the echo waveform.
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