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公开(公告)号：US20240168507A1
公开(公告)日：2024-05-23
申请号：US18307320
申请日：2023-04-26
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Sandeep Krishnan , Tallam Vishwanath , Akshay Jadhav
Abstract: A bandgap reference circuit includes a first diode-coupled transistor having a first control terminal and first and second current terminals and a second transistor having a second control terminal and third and fourth current terminals. The second control terminal is coupled to the first control terminal. A third transistor have a third control terminal and fifth and sixth current terminals. A fourth diode-coupled transistor has a fourth control terminal and seventh and eighth current terminals. The fourth control terminal is coupled to the third control terminal. An operational amplifier has a first input, a second input, and an output. The output is coupled to the first current terminal. A first resistor is coupled between the output and the third current terminal. A second resistor is coupled between the sixth and eighth current terminals.
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公开(公告)号：US11914411B2
公开(公告)日：2024-02-27
申请号：US17314637
申请日：2021-05-07
Applicant: Texas Instruments Incorporated
Inventor： Sandeep Shylaja Krishnan , Tallam Vishwanath , Akshay Yashwant Jadhav
CPC classification number: G05F3/265 , G05F3/222 , G05F3/225 , G05F3/30 , H03F3/45179
Abstract: A bandgap reference circuit includes first through fourth bipolar junction transistors (BJTs). The base and collector of the first BJT are shorted together. The second BJT is coupled to the first BJT via a first resistor. The base of the third BJT is coupled to the base of the first BJT. The base and collector of the fourth BJT are coupled together and also are coupled to the base of the second BJT. A second resistor is coupled to the fourth emitter of the fourth BJT. A third resistor is coupled to the second resistor and to the emitter of the second BJT. An operational amplifier has a first input coupled to the first resistor and the collector of the second BJT, a second input coupled to the emitter of the third BJT and the collector of the fourth BJT, and an output coupled to the collectors of the first and third BJTs.
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公开(公告)号：US12189411B2
公开(公告)日：2025-01-07
申请号：US18423948
申请日：2024-01-26
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Sandeep Shylaja Krishnan , Tallam Vishwanath , Akshay Yashwant Jadhav
Abstract: A bandgap reference circuit includes first through fourth bipolar junction transistors (BJTs). The base and collector of the first BJT are shorted together. The second BJT is coupled to the first BJT via a first resistor. The base of the third BJT is coupled to the base of the first BJT. The base and collector of the fourth BJT are coupled together and also are coupled to the base of the second BJT. A second resistor is coupled to the fourth emitter of the fourth BJT. A third resistor is coupled to the second resistor and to the emitter of the second BJT. An operational amplifier has a first input coupled to the first resistor and the collector of the second BJT, a second input coupled to the emitter of the third BJT and the collector of the fourth BJT, and an output coupled to the collectors of the first and third BJTs.
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公开(公告)号：US11929755B2
公开(公告)日：2024-03-12
申请号：US17513984
申请日：2021-10-29
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Tallam Vishwanath , Sandeep Shylaja Krishnan
Abstract: This description relates generally to piecewise temperature compensation. In an example, a circuit includes a knee code selector that can be configured to set a knee point temperature for a correction current responsive to a respective knee point temperature code of knee point temperature codes and a respective temperature sense signal of temperature sense signals. The circuit includes an output circuit that can be configured to provide the correction current responsive to the respective temperature sense signal and temperature voltages, and a trim digital to analog converter (DAC) that can be configured to provide a piecewise compensation current responsive to the correction current and a respective trim code of trim codes.
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公开(公告)号：US11876490B2
公开(公告)日：2024-01-16
申请号：US17587105
申请日：2022-01-28
Applicant: Texas Instruments Incorporated
Inventor： Sandeep Shylaja Krishnan , Akshay Yashwant Jadhav , Tallam Vishwanath
CPC classification number: H03F1/303 , G05F3/267 , H03F2200/375 , H03F2200/447 , H03F2200/468
Abstract: Described embodiments include an integrated circuit for temperature gradient compensation of a bandgap voltage. A bandgap core circuit has a bandgap feedback input, a bandgap adjustment input and a bandgap reference output. A resistor is coupled between the bandgap adjustment input and a ground terminal. An offset and slope correction circuit has an offset correction output that is coupled to the bandgap adjustment input. A signal at the offset correction output is trimmed at an ambient temperature. A thermal error cancellation (TEC) circuit has a TEC output coupled to the bandgap adjustment input. The TEC circuit includes first and second temperature sensors that are located apart from each other. A signal at the TEC output is responsive to temperatures at the first and second temperature sensors. An amplifier has an amplifier input and an amplifier output. The amplifier input is coupled to the bandgap reference output.
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Patent Agency Ranking
公开(公告)号：US20240168510A1
公开(公告)日：2024-05-23
申请号：US18423948
申请日：2024-01-26
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Sandeep Shylaja Krishnan , Tallam Vishwanath , Akshay Yashwant Jadhav
CPC classification number: G05F3/265 , G05F3/222 , G05F3/225 , G05F3/30 , H03F3/45179
Abstract: A bandgap reference circuit includes first through fourth bipolar junction transistors (BJTs). The base and collector of the first BJT are shorted together. The second BJT is coupled to the first BJT via a first resistor. The base of the third BJT is coupled to the base of the first BJT. The base and collector of the fourth BJT are coupled together and also are coupled to the base of the second BJT. A second resistor is coupled to the fourth emitter of the fourth BJT. A third resistor is coupled to the second resistor and to the emitter of the second BJT. An operational amplifier has a first input coupled to the first resistor and the collector of the second BJT, a second input coupled to the emitter of the third BJT and the collector of the fourth BJT, and an output coupled to the collectors of the first and third BJTs.
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公开(公告)号：US20240162912A1
公开(公告)日：2024-05-16
申请号：US18423411
申请日：2024-01-26
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Tallam Vishwanath , Sandeep Shylaja Krishnan
Abstract: This description relates generally to piecewise temperature compensation. In an example, a circuit includes a knee code selector that can be configured to set a knee point temperature for a correction current responsive to a respective knee point temperature code of knee point temperature codes and a respective temperature sense signal of temperature sense signals. The circuit includes an output circuit that can be configured to provide the correction current responsive to the respective temperature sense signal and temperature voltages, and a trim digital to analog converter (DAC) that can be configured to provide a piecewise compensation current responsive to the correction current and a respective trim code of trim codes.
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公开(公告)号：US20240097621A1
公开(公告)日：2024-03-21
申请号：US18522321
申请日：2023-11-29
Applicant: Texas Instruments Incorporated
Inventor： Sandeep Shylaja Krishnan , Akshay Yashwant Jadhav , Tallam Vishwanath
CPC classification number: H03F1/303 , G05F3/267 , H03F2200/375 , H03F2200/447 , H03F2200/468
Abstract: Described embodiments include an integrated circuit for temperature gradient compensation of a bandgap voltage. A bandgap core circuit has a bandgap feedback input, a bandgap adjustment input and a bandgap reference output. A resistor is coupled between the bandgap adjustment input and a ground terminal. An offset and slope correction circuit has an offset correction output that is coupled to the bandgap adjustment input. A signal at the offset correction output is trimmed at an ambient temperature. A thermal error cancellation (TEC) circuit has a TEC output coupled to the bandgap adjustment input. The TEC circuit includes first and second temperature sensors that are located apart from each other. A signal at the TEC output is responsive to temperatures at the first and second temperature sensors. An amplifier has an amplifier input and an amplifier output. The amplifier input is coupled to the bandgap reference output.
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公开(公告)号：US20220329211A1
公开(公告)日：2022-10-13
申请号：US17587105
申请日：2022-01-28
Applicant: Texas Instruments Incorporated
Inventor： Sandeep Shylaja Krishnan , Akshay Yashwant Jadhav , Tallam Vishwanath
Abstract: Described embodiments include an integrated circuit for temperature gradient compensation of a bandgap voltage. A bandgap core circuit has a bandgap feedback input, a bandgap adjustment input and a bandgap reference output. A resistor is coupled between the bandgap adjustment input and a ground terminal. An offset and slope correction circuit has an offset correction output that is coupled to the bandgap adjustment input. A signal at the offset correction output is trimmed at an ambient temperature. A thermal error cancellation (TEC) circuit has a TEC output coupled to the bandgap adjustment input. The TEC circuit includes first and second temperature sensors that are located apart from each other. A signal at the TEC output is responsive to temperatures at the first and second temperature sensors. An amplifier has an amplifier input and an amplifier output. The amplifier input is coupled to the bandgap reference output.
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公开(公告)号：US11088699B1
公开(公告)日：2021-08-10
申请号：US16894509
申请日：2020-06-05
Applicant: Texas Instruments Incorporated
Inventor： Tallam Vishwanath , Sandeep Shylaja Krishnan
Abstract: An electronic device includes a bandgap reference circuit having an output, and a bias input; a piecewise compensation circuit having an output coupled to the bias input, and an input; and a piecewise compensation current generator having an output coupled to the input of the piecewise compensation circuit, and a knee point temperature adjustment circuit coupled to the output of the piecewise compensation current generator.
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