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公开(公告)号：US12271216B2
公开(公告)日：2025-04-08
申请号：US18040025
申请日：2021-11-30
Applicant: Analog Devices, Inc.
Inventor： Petrus M. Stroet
Abstract: Apparatus and methods for logarithmic current to voltage conversion are disclosed herein. In certain embodiments, a logarithmic current to voltage converter includes an input terminal that receives an input current, an output terminal that provides a logarithmic output voltage, a first field-effect transistor (FET) having a gate connected to the input terminal, a first bipolar transistor having a collector connected to the input terminal and an emitter connected to the output terminal, and a stacked transistor connected to the output terminal and to the first FET to form a feedback loop. For example, the stacked transistor can correspond to a second bipolar transistor having a collector connected to the output terminal and a base connected to the source of the first FET, or to a second FET having a drain connected to the output terminal and a gate connected to the source of the first FET.
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Patent Agency Ranking
公开(公告)号：US20250070727A1
公开(公告)日：2025-02-27
申请号：US18795856
申请日：2024-08-06
Applicant: Analog Devices, Inc.
Inventor： Petrus M. Stroet
Abstract: Apparatus and methods for preventing overshoot for a high-to-low input current transient of a logarithmic transimpedance amplifier are disclosed. In certain embodiments, an amplifier system includes a logarithmic transimpedance amplifier having an input that receives an input current signal, and a current pulse injection circuit that injects a current pulse into the input of the logarithmic transimpedance amplifier in response to detecting a transition of the input current signal from a high current value to a low current value.
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公开(公告)号：US20240280615A1
公开(公告)日：2024-08-22
申请号：US18581893
申请日：2024-02-20
Applicant: Analog Devices, Inc.
Inventor： Petrus M. Stroet , Daniel J. Linebarger , John P. Myers , Michael Hendrikus Laurentius Kouwenhoven
CPC classification number: G01R19/32 , G01R35/005
Abstract: A device may include an intercept-temperature drift input to receive an intercept-temperature drift value. The device may further include a reference current generator that generates a reference current based at least in part on the intercept-temperature drift value. Additionally, the device may include an analog signal chain that adjusts a slope-temperature drift of the signal-strength detector by adjusting a delta proportional to absolute temperature of the analog signal chain.
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公开(公告)号：US20230409066A1
公开(公告)日：2023-12-21
申请号：US18040025
申请日：2021-11-30
Applicant: Analog Devices, Inc.
Inventor： Petrus M. Stroet
CPC classification number: G05F1/59 , G05F1/468 , H01L31/02019
Abstract: Apparatus and methods for logarithmic current to voltage conversion are disclosed herein. In certain embodiments, a logarithmic current to voltage converter includes an input terminal that receives an input current, an output terminal that provides a logarithmic output voltage, a first field-effect transistor (FET) having a gate connected to the input terminal, a first bipolar transistor having a collector connected to the input terminal and an emitter connected to the output terminal, and a stacked transistor connected to the output terminal and to the first FET to form a feedback loop. For example, the stacked transistor can correspond to a second bipolar transistor having a collector connected to the output terminal and a base connected to the source of the first FET, or to a second FET having a drain connected to the output terminal and a gate connected to the source of the first FET.
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公开(公告)号：US20240283409A1
公开(公告)日：2024-08-22
申请号：US18581919
申请日：2024-02-20
Applicant: Analog Devices, Inc.
Inventor： Petrus M. Stroet , Daniel J. Linebarger , John P. Myers , Michael Hendrikus Laurentius Kouwenhoven
CPC classification number: H03F1/302 , H03F3/45085 , H03M1/72 , H03F2200/261 , H03F2200/462
Abstract: A device may include an analog signal chain that adjusts a slope-temperature drift of the signal-strength detector by adjusting a delta proportional to absolute temperature of the analog signal chain. The device may further include an intercept-temperature drift input to receive an intercept-temperature drift value. Additionally, the device may include a reference current generator that generates a reference current based at least in part on the intercept-temperature drift value.
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公开(公告)号：US20240250647A1
公开(公告)日：2024-07-25
申请号：US18410182
申请日：2024-01-11
Applicant: Analog Devices, Inc.
Inventor： Petrus M. Stroet
CPC classification number: H03F3/3432 , H03F1/302 , H03F3/45085 , H03F3/456
Abstract: Logarithmic current-to-voltage converters with emitter resistance compensation are disclosed herein. In certain embodiments, a logarithmic current-to-voltage converter includes a logarithmic bipolar transistor that converts an input current to a logarithmic voltage, and an emitter resistance compensation circuit that includes a replica of the logarithmic bipolar transistor. The emitter resistance compensation circuit processes a copy of the input current to generate an emitter resistance compensation signal that adjusts the logarithmic voltage to correct for an error introduced by an emitter resistance of the logarithmic bipolar transistor. By providing emitter resistance compensation in this matter, logarithmic current-to-voltage conversion with high accuracy and low log error is achieved.
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