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公开(公告)号：US12019101B2
公开(公告)日：2024-06-25
申请号：US17874667
申请日：2022-07-27
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Vadim Valerievich Ivanov , Srinivas Pulijala , Piyush Kaslikar
IPC: G01R15/14 , G01R19/252 , H02M1/00
CPC classification number: G01R15/146 , G01R19/252 , H02M1/0009
Abstract: A current measurement and control circuit may comprise a shunt resistor coupled between supply and output nodes; a first resistor coupled to the supply node; a second resistor coupled to ground; and a transconductance amplifier having an input coupled to the first resistor to define a compensation node and another input coupled to the output node. The circuit may also include a first transistor having a first current terminal coupled to the compensation node and a second current terminal coupled to the second resistor to define a measurement node; and a second transistor having a first current terminal coupled to ground and a second current terminal coupled to the output node. The circuit may also include an ADC having an analog input coupled to the measurement node; an IDAC having an analog output coupled to the compensation node; and switches to set the circuit in a measurement or a compensation mode.
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公开(公告)号：US11962276B2
公开(公告)日：2024-04-16
申请号：US17501210
申请日：2021-10-14
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Vadim Valerievich Ivanov , Srinivas Kumar Pulijala
CPC classification number: H03F3/393 , H03F3/45179 , H03F2200/165 , H03F2200/261 , H03F2200/271
Abstract: In examples of a chopper operational amplifier, a current control circuit comprises a pair of voltage sources, each of which may be varied to generate a voltage signal of a particular value, and multiple inverters, each of which is configured to receive either a clock signal or its complement signal and one of the voltage signals. Based on these inputs, each inverter generates a control signal that is delivered to a corresponding switch in the input stage of the chopper operational amplifier to control the gate voltage of that switch. Based on the difference between the values of the voltage signals, the current control circuit operates to reduce the amplitudes of base currents induced by charge injection at the input terminals of the chopper operational amplifier.
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公开(公告)号：US20220209730A1
公开(公告)日：2022-06-30
申请号：US17136073
申请日：2020-12-29
Applicant: Texas Instruments Incorporated
Inventor： Vadim Valerievich Ivanov , Munaf Hussain Shaik , Srinivas Kumar Pulijala , Patrick Forster , Jerry Lee Doorenbos
Abstract: Disclosed is a system that comprises an operational amplifier with adjustable operational parameters and a trimming module. The trimming module can adjust the operational parameters of the op-amp based on a memory value to compensate for an offset voltage of the op-amp. The trimming module can comprise successive approximation register (SAR) logic that controls the memory value. The SAR logic can be configured to detect a given memory value that causes an output voltage of the op-amp to be within a predetermined voltage interval when applying a predetermined common mode voltage to inverting and non-inverting inputs of the op-amp.
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公开(公告)号：US20210080986A1
公开(公告)日：2021-03-18
申请号：US16934334
申请日：2020-07-21
Applicant: Texas Instruments Incorporated
Inventor： Avinash Shreepathi Bhat , Vadim Valerievich Ivanov
Abstract: A linear regulator system is described. The linear regulator system includes a linear regulator core circuit including a pass element adapted to provide an output voltage, and a voltage error amplifier circuit coupled to the pass element and adapted to regulate the output voltage to form a regulated output voltage, based on an output reference voltage. The linear regulator core circuit further includes a current limit circuit comprising a current limit switch element coupled to the voltage error amplifier circuit and adapted to selectively modulate the output reference voltage of the voltage error amplifier circuit to form a current limited reference voltage, based on a current limit control signal received at a current limit control terminal associated therewith, in order to limit a load current through the pass element from exceeding a predefined maximum allowable load current limit.
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公开(公告)号：US10855239B2
公开(公告)日：2020-12-01
申请号：US16568306
申请日：2019-09-12
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Vadim Valerievich Ivanov
Abstract: An amplifier includes an input stage, a folded cascode stage, and a class AB output stage. The folded cascode stage is coupled to the input stage. The class AB output stage is coupled to the folded cascode stage. The class AB output stage includes a high-side output transistor, a low-side output transistor, and a high-side feedback circuit that is coupled to the high-side output transistor. The high-side feedback circuit includes a high-side sense transistor and a high-side feedback transistor. The high-side sense transistor includes a control terminal that is coupled to a control terminal of the high-side output transistor. The high-side feedback transistor is coupled to an output of the high-side sense transistor and to the folded cascode stage. A first output of the folded cascode stage is coupled to the control terminal of the high-side sense transistor and to the control terminal of the high-side output transistor.
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Patent Agency Ranking
公开(公告)号：US10756685B2
公开(公告)日：2020-08-25
申请号：US16221473
申请日：2018-12-15
Applicant: TEXAS INSTRUMENTS INCORPORATED
Abstract: A chopper amplifier circuit includes a first amplifier path with chopper circuitry, a switched-capacitor filter, and multiple gain stages. The chopper amplifier circuit also includes a second amplifier path with a feed-forward gain stage. A chopping frequency of the chopper circuitry is greater than a threshold frequency at which the second amplifier path is used instead of the first amplifier path.
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公开(公告)号：US20200090777A1
公开(公告)日：2020-03-19
申请号：US16248283
申请日：2019-01-15
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Vadim Valerievich Ivanov
IPC: G11C27/02
Abstract: A sample and hold circuit with long hold time. A sample and hold circuit includes an amplifier, a capacitor, a switch, and a sampling network. The capacitor includes a first terminal coupled to an inverting input of the amplifier. The switch includes a first terminal that is coupled to an output of the amplifier, and a second terminal that is coupled to the inverting input of the amplifier. The sampling network is coupled to a non-inverting input of the amplifier.
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公开(公告)号：US10218324B2
公开(公告)日：2019-02-26
申请号：US15395073
申请日：2016-12-30
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Vadim Valerievich Ivanov , Srinivas K. Pulijala
IPC: H03F3/45
Abstract: At least some embodiments are directed to a system that comprises a differential input transistor pair (DITP) comprising first and second transistors, a first feedback loop coupled to the first transistor, and a second feedback loop coupled to the second transistor. When a differential voltage applied to the input stage is within a first range, the first and second feedback loops control a tail current supplied to the DITP, where the tail current at least partially determines a transconductance of the DITP. When the differential voltage is within a second range, the transconductance of the DITP is at least partially determined by a first resistor in the first feedback loop or by a second resistor in the second feedback loop.
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公开(公告)号：US09837973B2
公开(公告)日：2017-12-05
申请号：US13950643
申请日：2013-07-25
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Steven Graham Brantley , Vadim Valerievich Ivanov
IPC: H03F3/45
CPC classification number: H03F3/45376 , H03F2203/45568 , H03F2203/45571
Abstract: A differential input circuit (FIG. 3A) is disclosed. The circuit includes a first input terminal (drain of 310) and a second input terminal (drain of 312). A first input transistor (310) has a first control terminal and has a current path coupled to the first input terminal. A second input transistor (312) has a second control terminal and has a current path coupled to the second input terminal. A third transistor (306) has a third control terminal and has a current path between a first differential input terminal (Vin+) and the first control terminal. A fourth transistor (308) has a fourth control terminal and has a current path between a second differential input terminal (Vin−) and the second control terminal.
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公开(公告)号：US09817429B2
公开(公告)日：2017-11-14
申请号：US14749888
申请日：2015-06-25
Applicant: Texas Instruments Incorporated
Inventor： Vadim Valerievich Ivanov
Abstract: Methods and circuits for adjusting the output parameter of a device wherein the output parameter is temperature dependent are disclosed herein. An example of a method includes: adjusting the output parameter to a target level at a first temperature; adjusting a linear temperature-dependent variable related to the output parameter to zero at the first temperature; adjusting a nonlinear temperature-dependent variable related to the output parameter to zero at the first temperature; adjusting the output parameter to the target level at a second temperature using the linear-dependent variable; adjusting the nonlinear temperature-dependent variable to zero at the second temperature; and adjusting the output parameter to the target level at a third temperature by adjusting the nonlinear variable.
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