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公开(公告)号：US20210310863A1
公开(公告)日：2021-10-07
申请号：US17348976
申请日：2021-06-16
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Rakul VISWANATH , Nagesh SURENDRANATH , Sandeep Kesrimal OSWAL , Ratna Kumar Venkata PARUPUDI
IPC: G01J1/44
Abstract: A dark current compensation circuit comprises a first comparator having inputs for a detection signal and a first voltage, and a second comparator having inputs for the detection signal and a second voltage. The dark current compensation circuit also comprises a controller coupled to the first and second comparators, which has an input for an event signal. An adjustable current source is coupled to the controller and configured to generate a compensation current. The controller adjusts a value of the compensation current based on the first and second comparator outputs and maintains a constant value in response to the event signal indicating photons incident on a photon detector. In some implementations, the dark current compensation circuit further comprises an analog sub-circuit coupled to the adjustable current source and configured to receive the detection signal. The analog sub-circuit generates an analog compensation current in response to the detection signal.
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公开(公告)号：US20190297294A1
公开(公告)日：2019-09-26
申请号：US15926025
申请日：2018-03-20
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Sravana Kumar GOLI , Jeevan MITHRA , Nagesh SURENDRANATH , Sandeep Kesrimal OSWAL
IPC: H04N5/3745
Abstract: An active pixel sensor a plurality of sensor pixels disposed in a row, a plurality of sensor pixels in a column, and steering circuitry coupled to each of the sensor pixels. Each of the sensor pixels includes a first pixel circuit, and a second pixel circuit. For each of the sensor pixels, the steering circuitry includes a first switch, a second switch, a third switch, and a fourth switch. The first switch and the second switch are connected in series to route an input signal to the first pixel circuit. The third switch and a fourth switch are connected in parallel to route the input signal to the second pixel circuit.
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公开(公告)号：US20240072738A1
公开(公告)日：2024-02-29
申请号：US17899338
申请日：2022-08-30
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Sravana Kumar GOLI , Nagesh SURENDRANATH
CPC classification number: H03F3/005 , H03F3/45475
Abstract: In at least one example, a circuit includes an amplifier, a first feedback loop, and a second feedback loop. The amplifier includes an amplifier input and an amplifier output. The first feedback loop includes a first feedback capacitor and a first switch. The first feedback loop is coupled between the amplifier input and the amplifier output. The first feedback capacitor is coupled to the amplifier output through the first switch. The second feedback loop includes a second feedback capacitor and a second switch. The second feedback loop is coupled in parallel with the first feedback loop between the amplifier input and the amplifier output. The second feedback capacitor is coupled to the amplifier input and to the first feedback capacitor through the second switch.
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公开(公告)号：US20170035376A1
公开(公告)日：2017-02-09
申请号：US14871245
申请日：2015-09-30
Applicant: Texas Instruments Incorporated
Inventor： Nagesh SURENDRANATH , Rakul VISWANATH , Sandeep Kesrimal OSWAL
CPC classification number: A61B6/4241 , A61B6/032 , A61B6/4208 , A61B6/4233 , G01T1/171 , G01T1/24
Abstract: The disclosure provides a circuit that includes a charge sensitive amplifier (CSA) that generates an integrated signal in response to a current signal. An active comparator is coupled to the CSA. The active comparator receives the integrated signal and a primary reference voltage signal, and generates an event detect signal. A first delay element is coupled to the active comparator and provides a fixed delay to the event detect signal to generate a convert signal. A discriminator system is coupled to the CSA. The discriminator system samples the integrated signal when activated by the convert signal.
Abstract translation: 本公开提供了一种电路，其包括响应于当前信号产生积分信号的电荷敏感放大器（CSA）。 有源比较器耦合到CSA。 有源比较器接收积分信号和主参考电压信号，并产生事件检测信号。 第一延迟元件耦合到有源比较器，并向事件检测信号提供固定延迟以产生转换信号。 鉴别器系统耦合到CSA。 鉴别器系统在通过转换信号激活时对积分信号进行采样。
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Patent Agency Ranking
公开(公告)号：US20240407175A1
公开(公告)日：2024-12-05
申请号：US18326939
申请日：2023-05-31
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Scott R. SUMMERFELT , Michael BALL , John RODRIGUEZ , Nagesh SURENDRANATH , Antoine Lourdes Praveen AROUL , Eduardo BARTOLOME
Abstract: An apparatus includes: groups of ferroelectric memory bit cells; and memory interface circuitry having processing outputs and memory access terminals. The memory access terminals are coupled to the groups of ferroelectric memory bit cells. The memory interface circuitry is configured to: provide control signals via the memory access terminals to perform read operations on the groups of ferroelectric memory bit cells; receive first signals from the groups of ferroelectric memory bit cells via the memory access terminals from the read operations; and for each group of the groups of ferroelectric memory bit cells, provide second signals representing relationships between the first signals received from the group of ferroelectric memory bit cells and a respective reference voltage of the reference voltages at the processing outputs, the reference voltages representing different temperatures.
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公开(公告)号：US20220399388A1
公开(公告)日：2022-12-15
申请号：US17491397
申请日：2021-09-30
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Bradley Andrew GLASSCOCK , Nagesh SURENDRANATH , Shriram DEVI
IPC: H01L27/146
Abstract: In examples, an electronic device comprises a semiconductor package including a semiconductor die and a set of conductive members coupled to the semiconductor die, the set of conductive members coupled to a bottom surface of the semiconductor package. The package also includes a conductive terminal coupled to the semiconductor die and exposed to the bottom surface, the set of conductive members extending farther away from the bottom surface of the semiconductor die than the conductive terminal extends from the bottom surface of the semiconductor die. The electronic device includes a flexible substrate having first and second ends opposing each other, the first end having a first conductive terminal coupled to the conductive terminal. The second end has a second conductive terminal adapted to be coupled to an electronic component, the first and second conductive terminals are coupled to each other, and the flexible substrate has a bottom surface that does not extend farther away from the bottom surface of the semiconductor package than the set of conductive members extends from the bottom surface of the semiconductor package.
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公开(公告)号：US20210088680A1
公开(公告)日：2021-03-25
申请号：US17114962
申请日：2020-12-08
Applicant: Texas Instruments Incorporated
Inventor： Rakul VISWANATH , Nagesh SURENDRANATH , Sandeep Kesrimal OSWAL , Ratna Kumar Venkata PARUPUDI
Abstract: In described examples, a charge sensitive amplifier (CSA) generates an integrated signal in response to a current signal. A high pass filter is coupled to the CSA and receives the integrated signal and an inverse of an event signal, the high pass filter generates a coarse signal. An active comparator is coupled to the high pass filter and receives the coarse signal and a primary reference voltage signal, the active comparator generates the event signal.
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公开(公告)号：US20200264039A1
公开(公告)日：2020-08-20
申请号：US16277653
申请日：2019-02-15
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Nagesh SURENDRANATH , Rakul VISWANATH
Abstract: A circuit for use in a system that includes a detector, wherein the circuit comprises an input terminal to receive a detector signal from the detector external to the circuit, the detector signal to include an error charge corresponding to a leakage current. The circuit further comprises an amplifier coupled to the input terminal to receive input signals corresponding to the detector signal, including the error charge applied to an input of the amplifier. The circuit further comprises a feedback path coupled across the amplifier, wherein the feedback path comprises a first switch coupled across a leakage resistor and to a leakage capacitor for discharging a feedback compensation charge from the leakage capacitor and onto the input of the amplifier to substantially cancel the error charge.
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公开(公告)号：US20200225370A1
公开(公告)日：2020-07-16
申请号：US16247639
申请日：2019-01-15
Applicant: Texas Instruments Incorporated
Inventor： Rakul VISWANATH , Nagesh SURENDRANATH , Sandeep Kesrimal OSWAL , Ratna Kumar Venkata PARUPUDI
Abstract: In described examples, a charge sensitive amplifier (CSA) generates an integrated signal in response to a current signal. A high pass filter is coupled to the CSA and receives the integrated signal and an inverse of an event signal, the high pass filter generates a coarse signal. An active comparator is coupled to the high pass filter and receives the coarse signal and a primary reference voltage signal, the active comparator generates the event signal.
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