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公开(公告)号：US20210099186A1
公开(公告)日：2021-04-01
申请号：US16911702
申请日：2020-06-25
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Meghna AGRAWAL
IPC: H03M3/00
Abstract: A delta-sigma modulator includes a first integrator and a comparator. The comparator's positive input couples to the first integrator's positive output, and the comparator's negative input couples to the first integrator's negative output. A first current DAC comprises a current source device, and first and second transistors. The first transistor hays a first transistor control input and first and second current terminals. The first current terminal couples to the current source device, and the second current terminal couples to the first integrator positive output. The second transistor has a second transistor control input and third and fourth current terminals. The third current terminal couples to the current source device, and the fourth current terminal couples to the first integrator negative output. A first capacitive device couples to the second transistor control input and to both the second current terminal and the first integrator positive output.
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公开(公告)号：US20240267053A1
公开(公告)日：2024-08-08
申请号：US18639466
申请日：2024-04-18
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Meghna AGRAWAL , Debapriya SAHU
CPC classification number: H03M1/0617 , H03M3/464
Abstract: A circuit includes a digital-to-analog converter (DAC) and a compensation circuit. The DAC has first and second terminals. The compensation circuit includes a capacitor and a transistor. The capacitor has first and second terminals, with the first terminal of the capacitor coupled to the first terminal of the DAC. The transistor has a source coupled to the second terminal of the capacitor, and has a gate coupled to the second terminal of the DAC.
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公开(公告)号：US20220407537A1
公开(公告)日：2022-12-22
申请号：US17893076
申请日：2022-08-22
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Debapriya SAHU , Pranav SINHA , Meghna AGRAWAL
Abstract: An analog-to-digital converter (ADC) includes a switched capacitor circuit, a comparator, and a control circuit. The switched capacitor circuit has a switch control input and an output, and includes switches coupled to the switch control input and coupled to capacitors. The comparator has an input coupled to the output of the switched capacitor circuit and has an output. The control circuit has a switch control output coupled to the switch control input, has an input coupled to the output of the comparator, and provides switch control signals at the switch control output. Responsive to the switch control signals, the switched capacitor circuit provides an output signal to the comparator that is based on a sample of an analog input signal acquired in a sample acquisition cycle and based on a digital sample value output by the ADC prior to the sample acquisition cycle.
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公开(公告)号：US20210351783A1
公开(公告)日：2021-11-11
申请号：US17380356
申请日：2021-07-20
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Meghna AGRAWAL
IPC: H03M3/00
Abstract: A delta-sigma modulator includes a first integrator and a comparator. The comparator's positive input couples to the first integrator's positive output, and the comparator's negative input couples to the first integrator's negative output. A first current DAC comprises a current source device, and first and second transistors. The first transistor has a first transistor control input and first and second current terminals. The first current terminal couples to the current source device, and the second current terminal couples to the first integrator positive output. The second transistor has a second transistor control input and third and fourth current terminals. The third current terminal couples to the current source device, and the fourth current terminal couples to the first integrator negative output. A first capacitive device couples to the second transistor control input and to both the second current terminal and the first integrator positive output.
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Patent Agency Ranking
公开(公告)号：US20240113724A1
公开(公告)日：2024-04-04
申请号：US18535445
申请日：2023-12-11
Applicant: Texas Instruments Incorporated
Inventor： Debapriya SAHU , Pranav SINHA , Meghna AGRAWAL
CPC classification number: H03M1/462 , H03M1/0626 , H03M1/182 , H03M1/468
Abstract: An analog-to-digital converter (ADC) includes a switched capacitor circuit, a comparator, and a control circuit. The switched capacitor circuit has a switch control input and an output, and includes switches coupled to the switch control input and coupled to capacitors. The comparator has an input coupled to the output of the switched capacitor circuit and has an output. The control circuit has a switch control output coupled to the switch control input, has an input coupled to the output of the comparator, and provides switch control signals at the switch control output. Responsive to the switch control signals, the switched capacitor circuit provides an output signal to the comparator that is based on a sample of an analog input signal acquired in a sample acquisition cycle and based on a digital sample value output by the ADC prior to the sample acquisition cycle.
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公开(公告)号：US20230047618A1
公开(公告)日：2023-02-16
申请号：US17967815
申请日：2022-10-17
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Meghna AGRAWAL , Debapriya SAHU
Abstract: A circuit includes a digital-to-analog converter (DAC) and a compensation circuit. The DAC has first and second terminals. The compensation circuit includes a capacitor and a transistor. The capacitor has first and second terminals, with the first terminal of the capacitor coupled to the first terminal of the DAC. The transistor has a source coupled to the second terminal of the capacitor, and has a gate coupled to the second terminal of the DAC.
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公开(公告)号：US20220345138A1
公开(公告)日：2022-10-27
申请号：US17335667
申请日：2021-06-01
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Meghna AGRAWAL , Debapriya SAHU
Abstract: A circuit includes a digital-to-analog converter (DAC) and a compensation circuit. The DAC has a first terminal and a second terminal. The compensation circuit has a third terminal and a fourth terminal. The third terminal is coupled to the first terminal, and the fourth terminal is coupled to the second terminal. The compensation circuit is configured to source current into the first terminal responsive to an increase in voltage on the second terminal, and to sink current from the first terminal responsive to a decrease in voltage on the second terminal.
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公开(公告)号：US20220069834A1
公开(公告)日：2022-03-03
申请号：US17007887
申请日：2020-08-31
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Debapriya SAHU , Pranav SINHA , Meghna AGRAWAL
Abstract: A successive approximation register (SAR) analog-to-digital converter includes a capacitive digital-to-analog converter (CDAC), a comparator, and a SAR control circuit. The comparator is coupled to an output of the CDAC. The SAR control circuit is coupled to an input of the CDAC and to an output of the comparator. The SAR control circuit is configured to provide a feedback signal to the CDAC. The CDAC is configured to apply the feedback signal to form an infinite impulse response filter.
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公开(公告)号：US20210376851A1
公开(公告)日：2021-12-02
申请号：US17183433
申请日：2021-02-24
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Meghna AGRAWAL
Abstract: A circuit includes a transconductance stage having first and second outputs. The circuit also includes a comparator having first and second inputs. The first input is coupled to the first output, and the second input is coupled to the second output. The comparator includes first through fifth transistors and a pair of cross-coupled transistors. The pair of cross-coupled transistors is coupled to the second current terminals of the first and second transistors. The second current terminal of the third transistor is coupled to the second current terminal of the first transistor, and the first current terminals of the first, second, and third transistors are coupled together. The second current terminals of the fourth and fifth transistors are coupled together and to the control input of the third transistor.
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