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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：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：US20240036076A1
公开(公告)日：2024-02-01
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
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：US10931247B2
公开(公告)日：2021-02-23
申请号：US16357572
申请日：2019-03-19
Applicant: TEXAS INSTRUMENTS INCORPORATED
Abstract: A chopper amplifier circuit includes a first amplifier path, a second amplifier path, and a third amplifier path. The first amplifier path includes chopper circuitry configured to modulate an input signal and an offset voltage at a chopping frequency, and ripple reduction circuitry configured to attenuate the chopping frequency in a signal in the first amplifier path. The second amplifier path includes a feedforward gain stage, and is configured to apply higher gain to intermediate signal frequencies than is applied in the first amplifier path. The third amplifier path includes a feedforward gain stage, and is configured to apply higher gain to high signal frequencies than is applied in the first amplifier path and the second amplifier path. The intermediate signal frequencies are lower than the high signal frequencies.
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