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1.发明授权公开(公告)号：US11588471B1
公开(公告)日：2023-02-21
申请号：US17705647
申请日：2022-03-28
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Venkata Ramanan Ramamurthy
Abstract: Examples of amplifiers and nth-order loop filters thereof are configured to enable fast and robust recovery from saturation, while limiting signal distortion at or near full power delivery across multiple process and temperature corners. An example nth-order loop filter comprises n series-coupled resistor-capacitor (RC) integrators. In an example, each of the second RC integrator to the (n−1)th RC integrator has a reset mechanism responsive to a reset signal output from a reset controller when an input signal overload condition is detected at the input. Upon detecting the overload condition, each of the third RC integrator to the (n−1)th RC integrator is hard reset, the nth RC integrator is not reset, and a controlled reset is performed on the second RC integrator to recover from saturation caused by the signal overload condition, while maintaining the output signal below the 1% total harmonic distortion (THD) level at or near full power delivery.
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公开(公告)号：US20140012518A1
公开(公告)日：2014-01-09
申请号：US13928562
申请日：2013-06-27
Applicant: Texas Instruments Incorporated
Inventor： Venkata Ramanan Ramamurthy , Anand Dabak
Abstract: A flow meter ultrasonically measures fluid velocity in a pipe. Ultrasonic signals received by ultrasonic transducers are digitized. The difference between two ultrasonic propagation times is determined by computing a discrete cross-correlation of the digitized received signals. Computation time is reduced by computing only a few cross-correlation values near a peak cross-correlation value.
Abstract translation: 流量计超声波地测量管道中的流体速度。 由超声波换能器接收的超声波信号进行数字化处理。 通过计算数字化接收信号的离散互相关来确定两个超声波传播时间之间的差异。 通过计算峰值互相关值附近的几个互相关值来减少计算时间。
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Patent Agency Ranking
公开(公告)号：US09689726B2
公开(公告)日：2017-06-27
申请号：US13928562
申请日：2013-06-27
Applicant: Texas Instruments Incorporated
Inventor： Venkata Ramanan Ramamurthy , Anand Dabak
Abstract: A flow meter ultrasonically measures fluid velocity in a pipe. Ultrasonic signals received by ultrasonic transducers are digitized. The difference between two ultrasonic propagation times is determined by computing a discrete cross-correlation of the digitized received signals. Computation time is reduced by computing only a few cross-correlation values near a peak cross-correlation value.
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公开(公告)号：US20240223206A1
公开(公告)日：2024-07-04
申请号：US18147183
申请日：2022-12-28
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Venkata Ramanan Ramamurthy , Sumit Dubey , Jasjot Singh Chadha , Lokesh Kumar Botcha
Abstract: Examples of amplifiers and associated control blocks control analog and digital gains of such an amplifier to maintain a ripple voltage at the input/virtual terminals of an internal integrator below an upper limit. Such an example amplifier comprises digital and analog processing blocks. The digital processing block receives a digital audio signal and also includes a digital gain component. The analog processing block includes an analog gain component and an output stage having a supply voltage terminal. A boost controller receives the digital audio signal, and has a digital output and a boost voltage output to output a boost voltage. A digital controller receives the digital audio signal, and has a first digital input coupled to the digital output of the boost controller and a second digital input to receive a measurement value indicative of the outputted boost voltage. Based on its inputs, the digital controller controls the digital and analog gain components.
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公开(公告)号：US11750992B2
公开(公告)日：2023-09-05
申请号：US17360270
申请日：2021-06-28
Applicant: Texas Instruments Incorporated
Inventor： Venkata Ramanan Ramamurthy , Mohit Chawla
CPC classification number: H04R29/001 , G01R31/56 , H03F3/217 , H03F2200/03
Abstract: A switching amplifier includes: a driver circuit with differential inputs and differential outputs; and a fault detection circuit coupled to the differential outputs. The fault detection circuit includes: a power supply input; and a sense circuit coupled to the differential outputs. The sense circuit includes: a first resistor between the power supply input and a positive output of the differential outputs; a second resistor between the positive output and ground; a third resistor between the power supply input and a negative output of the differential outputs; and a fourth resistor between the negative output and ground. The fault detection circuit also includes an analyzer circuit coupled to the sense circuit and configured to determine a fault location relative to the differential outputs based on an output of the sense circuit.
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公开(公告)号：US09002665B2
公开(公告)日：2015-04-07
申请号：US13895269
申请日：2013-05-15
Applicant: Texas Instruments, Incorporated
Inventor： Ravindra Karnad , Venkata Ramanan Ramamurthy , Anand Dabak , Venu Gopinathan
CPC classification number: G01F1/66 , G01F1/663 , G01F15/063 , G01F15/0755
Abstract: A multi-channel flow sensing system typically includes first and second flow-sensing transducers arranged in each channel. A data acquisition system is coupled to the first and second transducers of each of the channels. The data acquisition system is arranged to transmit and/or receive a sensing signal from at least one of the first and second transducers of each of the channels. The received sensing signals are sequentially converted and accumulated as data for billing in accordance with the measured flow within each channel. Using common components within the data acquisition system for measuring the various channels reduces costs and increases affordability in cost-sensitive areas.
Abstract translation: 多通道流量检测系统通常包括布置在每个通道中的第一和第二流量感测换能器。 数据采集系统耦合到每个通道的第一和第二换能器。 数据采集系统被布置成从每个通道的第一和第二换能器中的至少一个发送和/或接收感测信号。 接收到的感测信号按照每个信道内的测量流顺序地转换和累积为用于计费的数据。 在数据采集系统中使用通用组件来测量各种通道可以降低成本并提高成本敏感区域的可负担性。
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公开(公告)号：US20140338467A1
公开(公告)日：2014-11-20
申请号：US13895269
申请日：2013-05-15
Applicant: Texas Instruments, Incorporated
Inventor： Ravindra Karnad , Venkata Ramanan Ramamurthy , Anand Dabak , Venu Gopinathan
IPC: G01F1/66
CPC classification number: G01F1/66 , G01F1/663 , G01F15/063 , G01F15/0755
Abstract: A multi-channel flow sensing system typically includes first and second flow-sensing transducers arranged in each channel. A data acquisition system is coupled to the first and second transducers of each of the channels. The data acquisition system is arranged to transmit and/or receive a sensing signal from at least one of the first and second transducers of each of the channels. The received sensing signals are sequentially converted and accumulated as data for billing in accordance with the measured flow within each channel. Using common components within the data acquisition system for measuring the various channels reduces costs and increases affordability in cost-sensitive areas.
Abstract translation: 多通道流量检测系统通常包括布置在每个通道中的第一和第二流量感测换能器。 数据采集系统耦合到每个通道的第一和第二换能器。 数据采集系统被布置成从每个通道的第一和第二换能器中的至少一个发送和/或接收感测信号。 接收到的感测信号按照每个信道内的测量流顺序地转换和累积为用于计费的数据。 在数据采集系统中使用通用组件来测量各种通道可以降低成本并提高成本敏感区域的可负担性。
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