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公开(公告)号：US11754599B2
公开(公告)日：2023-09-12
申请号：US17376850
申请日：2021-07-15
申请人： Analog Devices, Inc.
IPC分类号： G01R19/00 , G01R19/22 , G01R19/165
CPC分类号： G01R19/0092 , G01R19/16523 , G01R19/22 , H03F2200/222
摘要： A measurement circuit comprises an input terminal to receive a current signal, a first circuit branch coupled to the first terminal and including one or more circuit elements to receive a portion of the current signal, a second circuit branch coupled to the first terminal and including one or more additional circuit elements to receive another portion of the current signal, a nonlinear circuit element coupling the first circuit branch to the second circuit branch, and a quantization circuit configured to produce an input current measurement of current in the first and second circuit branches, and to include current in the second circuit branch in the input current measurement according to a magnitude of the input current signal.
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公开(公告)号：US20230238922A1
公开(公告)日：2023-07-27
申请号：US17586391
申请日：2022-01-27
申请人： Analog Devices, Inc.
发明人： Andrew Joseph Thomas
CPC分类号： H03F1/3211 , H03F3/4508 , H03F1/26 , H03F1/56
摘要： Circuit techniques for providing base-current cancellation of a bipolar junction transistor (BJT) differential pair that compensate for tail current noise and differential voltage transients without penalizing supply headroom.
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公开(公告)号：US20220337264A1
公开(公告)日：2022-10-20
申请号：US17230705
申请日：2021-04-14
申请人： Analog Devices, Inc.
发明人： Andrew Joseph Thomas
IPC分类号： H03M1/12 , H03K5/1252 , G01R19/10
摘要： A circuit having a capacitance driver circuit can allow for reduction of thermal noise to an application circuit. An output of the capacitance driver circuit can drive a capacitor for use by the application circuit coupled to the capacitor at the output of the capacitance driver circuit. The capacitance driver circuit can be structured to operate over a bandwidth of interest. With an input signal, received at the capacitance driver circuit, associated with a target voltage, an output voltage can be provided at the output of the capacitance driver circuit as a bandlimited filtered voltage value of the target voltage, where a root-mean-square voltage deviation of the output voltage from the target voltage, due to thermal noise, is less than a square root of (kT/C). The term k is Boltzmann's constant, T is Kelvin temperature of the capacitance driver circuit, and C is the capacitance of the driven capacitor.
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公开(公告)号：US11515884B2
公开(公告)日：2022-11-29
申请号：US17230705
申请日：2021-04-14
申请人： Analog Devices, Inc.
发明人： Andrew Joseph Thomas
IPC分类号： H03M1/12 , G01R19/10 , H03K5/1252
摘要： A circuit having a capacitance driver circuit can allow for reduction of thermal noise to an application circuit. An output of the capacitance driver circuit can drive a capacitor for use by the application circuit coupled to the capacitor at the output of the capacitance driver circuit. The capacitance driver circuit can be structured to operate over a bandwidth of interest. With an input signal, received at the capacitance driver circuit, associated with a target voltage, an output voltage can be provided at the output of the capacitance driver circuit as a bandlimited filtered voltage value of the target voltage, where a root-mean-square voltage deviation of the output voltage from the target voltage, due to thermal noise, is less than a square root of (kT/C). The term k is Boltzmann's constant, T is Kelvin temperature of the capacitance driver circuit, and C is the capacitance of the driven capacitor.
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公开(公告)号：US11711073B1
公开(公告)日：2023-07-25
申请号：US17653614
申请日：2022-03-04
申请人： Analog Devices, Inc.
发明人： Andrew Joseph Thomas
IPC分类号： H03K5/1252 , H03K17/687
CPC分类号： H03K5/1252 , H03K17/6871
摘要： A signal conditioning circuit to reduce detrimental effects of analog circuit elements. The techniques described herein provide a cascade of buffer circuits and signal processing circuitry to measure and cancel the distortion introduced by the buffer circuits. Thus, a buffer can be added to the signal path of an input signal without the detrimental effects, such as added distortion, that typically accompany the addition of buffers.
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公开(公告)号：US20230013695A1
公开(公告)日：2023-01-19
申请号：US17376850
申请日：2021-07-15
申请人： Analog Devices, Inc.
IPC分类号： G01R19/00 , G01R19/165 , G01R19/22
摘要： A measurement circuit comprises an input terminal to receive a current signal, a first circuit branch coupled to the first terminal and including one or more circuit elements to receive a portion of the current signal, a second circuit branch coupled to the first terminal and including one or more additional circuit elements to receive another portion of the current signal, a nonlinear circuit element coupling the first circuit branch to the second circuit branch, and a quantization circuit configured to produce an input current measurement of current in the first and second circuit branches, and to include current in the second circuit branch in the input current measurement according to a magnitude of the input current signal.
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