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公开(公告)号：US10381993B1
公开(公告)日：2019-08-13
申请号：US16045103
申请日：2018-07-25
Applicant: QUALCOMM Incorporated
Inventor： Burt Lee Price , Jin Liang , Yeshwant Nagaraj Kolla
CPC classification number: H03F3/45995 , H03F1/02 , H03F3/45977 , H03F2200/375
Abstract: Single controller automatic calibrating circuits for reducing or canceling offset voltages in operational amplifiers (op-amps) in an instrumentation amplifier are disclosed. An automatic calibrating op-amp system is provided that includes an instrumentation amplifier, which includes a front-end amplifier circuit comprising at least one front-end op-amp and a final-stage amplifier circuit comprising a final-stage op-amp. The op-amp(s) can include auxiliary differential inputs for offset voltage cancellation. The automatic calibrating op-amp system also includes an automatic calibration circuit employing a single controller to generate calibration signals on a calibration output to an auxiliary differential input(s) of an op-amp(s) in the instrumentation amplifier for offset voltage cancellation. The automatic calibration circuit includes a single controller to generate calibration signals to the instrumentation amplifier to reduce or cancel offset voltage, thereby eliminating the need to provide multiple automatic calibration circuits or an automatic calibration circuit employing multiple controllers.
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2.发明申请公开(公告)号：US20190050009A1
公开(公告)日：2019-02-14
申请号：US15672356
申请日：2017-08-09
Applicant: QUALCOMM Incorporated
Inventor： Burt Lee Price , Yeshwant Nagaraj Kolla , Dhaval Rajeshbhai Shah , Jin Liang , Yu Sun , Hans Lee Yeager
CPC classification number: G05F1/565 , G01R19/003 , G01R19/0092 , G01R19/10 , G01R19/28 , H02M2001/0009
Abstract: Aspects for sensing total current of distributed load circuits independently of a spatial profile of the total current using distributed voltage averaging are disclosed. In one aspect, a current sense circuit is configured to sense total current of a distributed load circuit independently of where current is distributed. The current sense circuit includes distributed voltage averaging circuits configured to determine average voltages of the distributed load circuit based on voltages sensed at multiple resistive paths corresponding to a distribution network configured to provide voltage to the distributed load circuit. An amplifier includes an output node having an output voltage that is proportional to total current flowing in the distributed load circuit. The current sense circuit allows for sensing total current independent of where the current flows, providing more accurate current sensing compared to sensing current in one area of the distributed load circuit.
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公开(公告)号：US10418954B1
公开(公告)日：2019-09-17
申请号：US16045103
申请日：2018-07-25
Applicant: QUALCOMM Incorporated
Inventor： Burt Lee Price , Jin Liang , Yeshwant Nagaraj Kolla
Abstract: Single controller automatic calibrating circuits for reducing or canceling offset voltages in operational amplifiers (op-amps) in an instrumentation amplifier are disclosed. An automatic calibrating op-amp system is provided that includes an instrumentation amplifier, which includes a front-end amplifier circuit comprising at least one front-end op-amp and a final-stage amplifier circuit comprising a final-stage op-amp. The op-amp(s) can include auxiliary differential inputs for offset voltage cancellation. The automatic calibrating op-amp system also includes an automatic calibration circuit employing a single controller to generate calibration signals on a calibration output to an auxiliary differential input(s) of an op-amp(s) in the instrumentation amplifier for offset voltage cancellation. The automatic calibration circuit includes a single controller to generate calibration signals to the instrumentation amplifier to reduce or cancel offset voltage, thereby eliminating the need to provide multiple automatic calibration circuits or an automatic calibration circuit employing multiple controllers.
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公开(公告)号：US10345834B2
公开(公告)日：2019-07-09
申请号：US15672356
申请日：2017-08-09
Applicant: QUALCOMM Incorporated
Inventor： Burt Lee Price , Yeshwant Nagaraj Kolla , Dhaval Rajeshbhai Shah , Jin Liang , Yu Sun , Hans Lee Yeager
Abstract: Aspects for sensing total current of distributed load circuits independently of a spatial profile of the total current using distributed voltage averaging are disclosed. In one aspect, a current sense circuit is configured to sense total current of a distributed load circuit independently of where current is distributed. The current sense circuit includes distributed voltage averaging circuits configured to determine average voltages of the distributed load circuit based on voltages sensed at multiple resistive paths corresponding to a distribution network configured to provide voltage to the distributed load circuit. An amplifier includes an output node having an output voltage that is proportional to total current flowing in the distributed load circuit. The current sense circuit allows for sensing total current independent of where the current flows, providing more accurate current sensing compared to sensing current in one area of the distributed load circuit.
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