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公开(公告)号：US20210012958A1
公开(公告)日：2021-01-14
申请号：US17027437
申请日：2020-09-21
Applicant: Analog Devices, Inc.
Inventor： Kenneth G. Richardson
Abstract: For near field communications, inductive coils coupled to each communicating circuit are brought close together so that there is inductive coupling between the two coils. Data signals can then be relayed between the two circuits without any direct connection between them. However, the system is susceptible to common mode noise, such as ambient EMI. In addition to the “active” coil pairs used for transmitting and receiving data, a pair of “passive” coils is provided, proximate to the active coil pairs, that is only used for detecting the ambient EMI. The EMI signals detected by the passive coils are processed by a noise detector/processor, and the noise detector processor then controls the transmitters and/or receivers to at least partially compensate for the detected EMI signals. Transmit power or receiver thresholds may be controlled by the noise detector/processor to improve the signal-to-noise ratio, or other compensation techniques can be used.
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公开(公告)号：US09525411B2
公开(公告)日：2016-12-20
申请号：US14540762
申请日：2014-11-13
Applicant: Analog Devices, Inc.
Inventor： Kenneth G. Richardson , Ryan Schnell
IPC: G06F1/26 , H03K17/687 , H02M1/088 , H02M1/08 , H02M1/00
CPC classification number: H03K17/687 , H02M1/08 , H02M1/088 , H02M2001/0006
Abstract: An embodiment of a power supply circuit to generate a supply voltage for a gate driver circuit can include an isolated power supply circuit to receive a first voltage in a first isolated system and provide power to a cyclic charging power supply circuit, the cyclic charging power supply circuit providing a supply voltage to the gate driver circuit in a second isolated system, the isolated power supply circuit providing the power to the cyclic charging power supply circuit while the gate driver circuit drives a transistor in an on state. The isolated power supply circuit can include a control circuit to regulate the power provided to maintain or increase the supply voltage while the gate driver circuit drives the transistor in an on state. The power supply circuit can also include the cyclic charging power supply circuit to receive a second voltage in the second isolated system and provide the supply voltage to the gate driver circuit. The cyclic charging power supply circuit can include one or more of a bootstrap power supply circuit or a charge pump power supply circuit.
Abstract translation: 用于产生栅极驱动器电路的电源电压的电源电路的实施例可以包括：隔离电源电路，用于在第一隔离系统中接收第一电压，并为循环充电电源电路提供电力;循环充电电源 所述隔离电源电路在所述栅极驱动器电路驱动处于导通状态的晶体管时向所述循环充电电源电路提供电力，所述隔离电源电路向所述栅极驱动器电路提供电源电压。 隔离电源电路可以包括控制电路，用于调节所提供的功率以在栅极驱动器电路将晶体管驱动为导通状态时维持或增加电源电压。 电源电路还可以包括循环充电电源电路，以在第二隔离系统中接收第二电压，并向栅极驱动器电路提供电源电压。 循环充电电源电路可以包括自举电源电路或电荷泵电源电路中的一个或多个。
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公开(公告)号：US09363858B2
公开(公告)日：2016-06-07
申请号：US13919371
申请日：2013-06-17
Applicant: ANALOG DEVICES, INC.
Inventor： Eric Sagen , Jonathan Kraft , Kenneth G. Richardson
CPC classification number: H05B33/083 , H05B33/0815 , H05B33/0827 , Y02B20/347
Abstract: A drive system for multiple LED strings powered by a common line voltage. Current control circuits are connected in series with respective LED strings; each current control circuit includes a drive transistor (typically a FET) which causes a desired LED string current to be conducted. In one embodiment, the current conducted by a selected one of the LED strings is controlled by the line voltage regulation loop, while the currents conducted by the remaining LED strings are controlled by respective local current loops, thus avoiding conflicts between the local current and line voltage regulation loops. The LED string to be current regulated by the line voltage regulation loop can be determined by a variety of criteria, such as the current control circuit having the maximum FET gate voltage, the minimum FET source voltage, the minimum FET drain voltage, the maximum FET gate-source voltage, or the minimum FET drain-source voltage.
Abstract translation: 用于由公共线路电压供电的多个LED串的驱动系统。 电流控制电路与相应的LED串串联; 每个电流控制电路包括导致期望的LED串电流的驱动晶体管（通常为FET）。 在一个实施例中，由所选择的一个LED串所传导的电流由线路电压调节回路控制，而由剩余LED串所传导的电流由各自的局部电流回路控制，从而避免局部电流和线路之间的冲突 电压调节回路。 由电压调节回路调节的LED串可以通过各种标准来确定，例如具有最大FET栅极电压，最小FET源电压，最小FET漏极电压，最大FET的电流控制电路 栅源电压或最小FET漏源电压。
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公开(公告)号：US12072722B2
公开(公告)日：2024-08-27
申请号：US17901244
申请日：2022-09-01
Applicant: Analog Devices, Inc.
Inventor： Kevin R. Wrenner , Ruida Yun , Kenneth G. Richardson
Abstract: Aspects of the present disclosure include a hybrid circuit, including a first current sink configured to sink a zero temperature coefficient (ZTC) current, a second current sink configured to sink a positive temperature coefficient (PTC) current, a first transistor configured to provide a first current, a second transistor configured to provide a second current, a third transistor configured to provide a third current mirroring the ZTC current, a fourth transistor configured to provide a sum current of the first current and the third current, and a current mirror configured provide a hybrid current mirroring the sum current.
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公开(公告)号：US11120940B2
公开(公告)日：2021-09-14
申请号：US17027437
申请日：2020-09-21
Applicant: Analog Devices, Inc.
Inventor： Kenneth G. Richardson
Abstract: For near field communications, inductive coils coupled to each communicating circuit are brought close together so that there is inductive coupling between the two coils. Data signals can then be relayed between the two circuits without any direct connection between them. However, the system is susceptible to common mode noise, such as ambient EMI. In addition to the “active” coil pairs used for transmitting and receiving data, a pair of “passive” coils is provided, proximate to the active coil pairs, that is only used for detecting the ambient EMI. The EMI signals detected by the passive coils are processed by a noise detector/processor, and the noise detector processor then controls the transmitters and/or receivers to at least partially compensate for the detected EMI signals. Transmit power or receiver thresholds may be controlled by the noise detector/processor to improve the signal-to-noise ratio, or other compensation techniques can be used.
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Patent Agency Ranking
公开(公告)号：US11049639B2
公开(公告)日：2021-06-29
申请号：US15687185
申请日：2017-08-25
Applicant: Analog Devices, Inc.
Inventor： Kenneth G. Richardson
Abstract: Micro-fabricated coils are described. In some situations, the micro-fabricated coils include interleaved coils. In some situations, pairs of interleaved coils are stacked with respect to each other, separated by an insulating material. In some situations, the interleaved coils have an S-shape. The interleaved coils may be employed in a galvanic isolator.
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公开(公告)号：US20180233264A1
公开(公告)日：2018-08-16
申请号：US15687185
申请日：2017-08-25
Applicant: Analog Devices, Inc.
Inventor： Kenneth G. Richardson
CPC classification number: H01F19/04 , H01F38/14 , H01F41/041 , H01F2038/143
Abstract: Micro-fabricated coils are described. In some situations, the micro-fabricated coils include interleaved coils. In some situations, pairs of interleaved coils are stacked with respect to each other, separated by an insulating material. In some situations, the interleaved coils have an S-shape. The interleaved coils may be employed in a galvanic isolator.
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公开(公告)号：US11789477B1
公开(公告)日：2023-10-17
申请号：US17901244
申请日：2022-09-01
Applicant: Analog Devices, Inc.
Inventor： Kevin R. Wrenner , Ruida Yun , Kenneth G. Richardson
Abstract: Aspects of the present disclosure include a hybrid circuit, including a first current sink configured to sink a zero temperature coefficient (ZTC) current, a second current sink configured to sink a positive temperature coefficient (PTC) current, a first transistor configured to provide a first current, a second transistor configured to provide a second current, a third transistor configured to provide a third current mirroring the ZTC current, a fourth transistor configured to provide a sum current of the first current and the third current, and a current mirror configured provide a hybrid current mirroring the sum current.
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公开(公告)号：US10763037B2
公开(公告)日：2020-09-01
申请号：US16298913
申请日：2019-03-11
Applicant: Analog Devices, Inc.
Inventor： Kenneth G. Richardson
Abstract: For near field communications, inductive coils coupled to each communicating circuit are brought close together so that there is inductive coupling between the two coils. Data signals can then be relayed between the two circuits without any direct connection between them. However, the system is susceptible to common mode noise, such as ambient EMI. In addition to the “active” coil pairs used for transmitting and receiving data, a pair of “passive” coils is provided, proximate to the active coil pairs, that is only used for detecting the ambient EMI. The EMI signals detected by the passive coils are processed by a noise detector/processor, and the noise detector processor then controls the transmitters and/or receivers to at least partially compensate for the detected EMI signals. Transmit power or receiver thresholds may be controlled by the noise detector/processor to improve the signal-to-noise ratio, or other compensation techniques can be used.
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公开(公告)号：US20190295770A1
公开(公告)日：2019-09-26
申请号：US16298913
申请日：2019-03-11
Applicant: Analog Devices, Inc.
Inventor： Kenneth G. Richardson
Abstract: For near field communications, inductive coils coupled to each communicating circuit are brought close together so that there is inductive coupling between the two coils. Data signals can then be relayed between the two circuits without any direct connection between them. However, the system is susceptible to common mode noise, such as ambient EMI. In addition to the “active” coil pairs used for transmitting and receiving data, a pair of “passive” coils is provided, proximate to the active coil pairs, that is only used for detecting the ambient EMI. The EMI signals detected by the passive coils are processed by a noise detector/processor, and the noise detector processor then controls the transmitters and/or receivers to at least partially compensate for the detected EMI signals. Transmit power or receiver thresholds may be controlled by the noise detector/processor to improve the signal-to-noise ratio, or other compensation techniques can be used.
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