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公开(公告)号：US10739433B2
公开(公告)日：2020-08-11
申请号：US15465484
申请日：2017-03-21
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Anand Hariraj Udupa , Hussam Ahmed , Jagannathan Venkataraman , Sandeep Kesrimal Oswal , Prabin Krishna Yadav , Anand Reghunathan , Kiran Rajmohan
Abstract: A system may comprise: an excitation current source; a first electrode coupled to the excitation current source; and a second electrode coupled to the excitation current source. The first and second electrodes may be configured to pass an excitation current from the excitation current source through a human body. First and second calibration resistors may be coupled to and positioned between the excitation current source and the first electrode. Third and fourth calibration resistors may be coupled to and positioned between the excitation current source and the second electrode. The system may also comprise a sensor configured to measure voltages across each of the first, second, third, and fourth calibration resistors.
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公开(公告)号：US10073167B2
公开(公告)日：2018-09-11
申请号：US14856205
申请日：2015-09-16
Applicant: Texas Instruments Incorporated
Inventor： Jagannathan Venkataraman
Abstract: The disclosure provides a circuit. The circuit includes an amplifier and a digital to analog converter (DAC). The amplifier receives a reference voltage at an input node of the amplifier. The DAC is coupled to the amplifier through a refresh switch. The DAC includes one or more current elements. Each current element of the one or more current elements receives a clock. The DAC includes one or more switches corresponding to the one or more current elements. A feedback switch is coupled between the one or more switches and a feedback node of the amplifier. The DAC provides a feedback voltage at the feedback node of the amplifier.
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公开(公告)号：US09960780B1
公开(公告)日：2018-05-01
申请号：US15649262
申请日：2017-07-13
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Jagannathan Venkataraman , Eeshan Miglani
CPC classification number: H03M1/08 , H03K17/162 , H03K17/165 , H03M1/742
Abstract: At least some embodiments are directed to a system that comprises a differential switch network comprising first and second output nodes, first and second transistors coupled to the network, and first and second resistors coupled to the first and second transistors. The DAC also comprises a voltage source coupled to the first resistor and a ground connection coupled to the second resistor. The DAC further includes a capacitor coupled to the first and second transistors and to the second resistor.
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公开(公告)号：US09906237B1
公开(公告)日：2018-02-27
申请号：US15582355
申请日：2017-04-28
Applicant: Texas Instruments Incorporated
Inventor： Jagannathan Venkataraman , Eeshan Miglani , Karthikeyan Gunasekaran
CPC classification number: H03M3/436 , H03M1/00 , H03M1/12 , H03M1/747 , H03M3/328 , H03M3/454 , H03M3/50
Abstract: A digital-to-analog converter includes an adder having a plurality of inputs and an output coupled to the output of the converter. The converter further includes a plurality of digital-to-analog (DAC) elements, each DAC element has an output coupled to an input of the adder, and each DAC element has a DAC element input. A plurality of comparators have outputs coupled to a DAC element input. A first input of each comparator is coupled to the input of the converter. A second input of each comparator is selectively coupled to one of a predetermined voltage and a pseudo-random bit sequence (PRBS[n]).
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公开(公告)号：US09781784B2
公开(公告)日：2017-10-03
申请号：US14533763
申请日：2014-11-05
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Bharath Patil , Jagannathan Venkataraman
CPC classification number: H05B33/0815 , G09G2320/064 , H02M3/156 , H05B33/0818 , H05B33/0845 , H05B33/0851 , H05B37/02 , H05B41/3927 , Y02B20/346 , Y02B20/347 , Y10S362/80
Abstract: In an embodiment, method of controlling an illumination device by an output signal of a DC-DC converter is disclosed. The output signal is controlled by a PWM signal. The method includes receiving a feedback signal corresponding to variation in the output signal with respect to a pre-determined output signal, and determining a target duty cycle of the PWM signal based on the feedback signal. The PWM signal of the target duty cycle is capable of enabling the DC-DC converter to generate the pre-determined output signal. The method includes providing the PWM signal of an effective duty cycle equal to the target duty cycle over N switching pulses of the PWM signal to the DC-DC converter. The method provides the PWM signal by providing M switching pulses of a first PWM signal of a first duty cycle, and N−M switching pulses of a second PWM signal of a second duty cycle.
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Patent Agency Ranking
公开(公告)号：US11936346B2
公开(公告)日：2024-03-19
申请号：US17231728
申请日：2021-04-15
Applicant: Texas Instruments Incorporated
CPC classification number: H03F3/19 , H03H11/04 , H03M1/1245 , H03F2200/451
Abstract: A low noise amplifier for an RF sampling analog front end. The amplifier includes digital step attenuation for applying a selected attenuation to signals received at an input node, and a gain stage coupled to amplify the attenuated signal from the digital step attenuation circuit. In a differential amplifier implementation, a first input capacitor is coupled between a positive side input node and an output of the negative side digital attenuation circuit, and a second input capacitor is coupled between a negative side input node and an output of the positive side digital step attenuation circuit. In some embodiments, variable feedback circuits are coupled between each input node and an output of the corresponding gain stage, to selectively apply active termination at the input at high gain settings of the amplifier. Variable input and output resistors, and programmable noise filtering at the output, are provided in some embodiments.
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公开(公告)号：US11855816B2
公开(公告)日：2023-12-26
申请号：US17567775
申请日：2022-01-03
Applicant: Texas Instruments Incorporated
Inventor： Rakesh Manjunath , Aravind Ganesan , Ani Xavier , Jagannathan Venkataraman , Abhishek Agrawal , Charls Babu , Aditya Kumar
Abstract: A signal transmission system includes an equalization filter configured to filter an input signal based at least in part on a feedback signal, a slicer configured to generate data based on the filtered input signal at a plurality of different phases, a synchronizer configured to compute a phase delay between the input signal at each of the different phases and the data, and a pattern generator configured to generate the feedback signal at a phase adjusted by the phase delay.
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公开(公告)号：US20220337203A1
公开(公告)日：2022-10-20
申请号：US17231728
申请日：2021-04-15
Applicant: Texas Instruments Incorporated
Abstract: A low noise amplifier for an RF sampling analog front end. The amplifier includes digital step attenuation for applying a selected attenuation to signals received at an input node, and a gain stage coupled to amplify the attenuated signal from the digital step attenuation circuit. In a differential amplifier implementation, a first input capacitor is coupled between a positive side input node and an output of the negative side digital attenuation circuit, and a second input capacitor is coupled between a negative side input node and an output of the positive side digital step attenuation circuit. In some embodiments, variable feedback circuits are coupled between each input node and an output of the corresponding gain stage, to selectively apply active termination at the input at high gain settings of the amplifier. Variable input and output resistors, and programmable noise filtering at the output, are provided in some embodiments.
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公开(公告)号：US11374536B2
公开(公告)日：2022-06-28
申请号：US17158449
申请日：2021-01-26
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Rahul Sharma , Jagannathan Venkataraman , Eeshan Miglani , Sandeep Kesrimal Oswal
Abstract: A system includes a Zero IF transmitter having a mixer and a programmable gain stage. The Zero IF transmitter also includes an intermediate stage between the mixer and the programmable gain stage, wherein the intermediate stage is configured to decouple the mixer and the programmable gain stage.
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公开(公告)号：US10944361B2
公开(公告)日：2021-03-09
申请号：US16274519
申请日：2019-02-13
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Rahul Sharma , Jagannathan Venkataraman , Eeshan Miglani , Sandeep Kesrimal Oswal
Abstract: A system includes a Zero IF transmitter having a mixer and a programmable gain stage. The Zero IF transmitter also includes an intermediate stage between the mixer and the programmable gain stage, wherein the intermediate stage is configured to decouple the mixer and the programmable gain stage.
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