公开(公告)号：US20180175828A1

公开(公告)日：2018-06-21

申请号：US15380358

申请日：2016-12-15

Applicant: ANALOG DEVICES GLOBAL

Inventor： Ahmed Mohammad Ashry Othman ,  Mohamed Moussa Ramadan Esmael

IPC: H03H11/24 ,  H03H11/30

CPC classification number: H03H11/245 ,  H03H11/28 ,  H03H21/00 ,  H03K19/017545

Abstract: The present disclosure provides a voltage variable attenuator (VVA) with a controllable matching network. The output of the attenuation portion of the VVA is couple to a matching network. The matching network includes a resistive element, which may be a Field Effect Transistor (FET), whose resistance may be controlled as a function of attenuation. In particular, a control voltage used to control the resistance of the attenuation portion of the VVA is also used to control the resistive element of the matching network. In this manner, the output impedance of the VVA may be maintained at a desired level.

公开(公告)号：US20180175735A1

公开(公告)日：2018-06-21

申请号：US15383480

申请日：2016-12-19

Applicant: Analog Devices Global

Inventor： Tianting Zhao ,  Baoxing Chen ,  Yue Zhuo

IPC: H02M3/335 ,  H02M1/44

CPC classification number: H02M3/33507 ,  H02M1/44 ,  H02M3/3376 ,  H02M2001/123

Abstract: Isolated DC-DC converters and methods for operating the same are described herein. DC-DC converters include a driver that drives a primary winding of a transformer to transmit power to a secondary winding of the transformer across an isolation barrier. In some embodiments, a pair of symmetrical serial capacitors are provided between the driver and the primary winding of a resonant DC-DC converter with an on-chip transformer to slow down variations of a common mode voltage on the primary winding during operation. This in turn can suppress radiation emissions related to time variation rates of the common mode voltage and, and can also improve electromagnetic interference (EMI) performance of the DC-DC converter.

公开(公告)号：US20180167067A1

公开(公告)日：2018-06-14

申请号：US15375906

申请日：2016-12-12

Applicant: Analog Devices Global

Inventor： Christopher Peter Hurrell ,  Sanjay Rajasekhar

IPC: H03K17/693 ,  H02J7/00

CPC classification number: H02J7/0013 ,  H02J7/345 ,  H03K17/005 ,  H03K17/0416 ,  H03K17/693

Abstract: A pre-charge circuit is provided for pre-charging the input node of a capacitive component to which the multiplexer output is fed to a charge level that is close to or approximates the signal output level of the multiplexer when its output is next switched. In order to reduce the level shifting burden on the amplifier in the pre-charge circuit, each pre-charge circuit input channel has a respective capacitor that is able to be switched in and out of series with the respective multiplexer channels, such that the respective capacitors track the signal levels on the multiplexer channels. The provision of the corresponding capacitors for each MUX channel reduces the input current to the pre-charge amplifier, and allows for the level shifting burden to be taken by the capacitors, leading to more stable and lower power operation.

公开(公告)号：US20180139698A1

公开(公告)日：2018-05-17

申请号：US15809520

申请日：2017-11-10

Applicant: Analog Devices Global

Inventor： Philip P.E. Quinlan ,  Paul Lambkin

IPC: H04W52/02

CPC classification number: H04W52/0235 ,  G08C17/02 ,  H04Q9/00 ,  H04W88/02 ,  Y02D70/00 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/162 ,  Y02D70/164 ,  Y02D70/26

Abstract: A wireless sensor node is described. The wireless sensor node may include a wake-up circuitry configured to awaken the sensor when a request is received. The sensor may be placed in a sleep mode, thus saving battery usage until a wake-up signal requesting use of the sensor is received. Powering of the wake-up circuitry may be supplied through energy captured using an energy harvester. In one example, the energy for powering the wake-up circuitry is extracted from the same signal used for awakening the sensor. The wireless sensor mode may operate in a passive mode, in which the energy for powering the wake-up circuitry is harvested, or in a power supply-assisted mode, in which some of the power is provided by a power supply. High quality factors filters may be used to increase the signal-to-noise ratio of the wake-up signals, thus improving the node's ability to recognize activation requests.

公开(公告)号：US20180115144A1

公开(公告)日：2018-04-26

申请号：US15397389

申请日：2017-01-03

Applicant: Analog Devices Global

Inventor： Martin Murnane

IPC: H02H1/00 ,  H02S10/00 ,  H02S40/32 ,  H02S50/10

CPC classification number: H02H1/0015 ,  H02S10/00 ,  H02S40/32 ,  H02S50/00 ,  H02S50/10 ,  Y02E10/56

Abstract: Power systems having a DC content, such as photovoltaic (solar) panels present a problem if an arc fault appears because of a small break in a cable. The present disclosure describes an arc fault detection system that captures data in segments, examines the frequency spectrum to remove ‘false arc’ signatures and interference from a power converter of the power system, and then examines the cleaned frequency spectrum for arc events.

公开(公告)号：US09941894B1

公开(公告)日：2018-04-10

申请号：US15586848

申请日：2017-05-04

Applicant: Analog Devices Global

Inventor： Shurong Gu ,  Dennis A. Dempsey ,  GuangYang Qu ,  Hanqing Wang ,  Tony Yincai Liu

IPC: H03M1/66 ,  H03M1/08 ,  H03M1/00 ,  G01N27/416 ,  G01N33/00

CPC classification number: G01N33/004 ,  G01N27/4163 ,  H03M1/002 ,  H03M1/662 ,  H03M1/68 ,  H03M1/765

Abstract: A multiple output, multiple impedance string digital-to-analog converter (DAC) circuit can provide a first output having a first resolution in response to a first digital input signal and a second output having a second resolution in response to a second digital input signal. A main impedance string and a secondary impedance string can be coupled using switching networks to provide a first DAC output. By coupling additional switches to the main impedance string and by sharing the main impedance string, a second DAC output can be realized.

公开(公告)号：US20180076780A1

公开(公告)日：2018-03-15

申请号：US15600542

申请日：2017-05-19

Applicant: Analog Devices Global

Inventor： Hanqing Wang ,  Gerard Mora-Puchalt

IPC: H03F3/00 ,  H03F3/42 ,  H03F3/45 ,  H03F3/393 ,  H03F1/02 ,  H03F1/56 ,  H03F1/32

CPC classification number: H03F3/005 ,  H03F1/02 ,  H03F1/14 ,  H03F1/3211 ,  H03F1/56 ,  H03F3/387 ,  H03F3/393 ,  H03F3/426 ,  H03F3/45071 ,  H03F3/45475 ,  H03F2200/213 ,  H03F2200/267 ,  H03F2200/271 ,  H03F2200/378 ,  H03F2203/45458 ,  H03F2203/45514 ,  H03M3/00 ,  H03M3/496

Abstract: A capacitive gain amplifier circuit amplifies an input signal by a pair of differential amplifier circuits couples in series. The first differential amplifier circuit is reset during an autozero phase while disconnected from the second differential amplifier circuit, and the first and second differential amplifier circuits are connected together in series during a chop phase. A set of feedback capacitors is selectively switched in between respective outputs of the second differential amplifier circuit and respective inputs of the first differential amplifier circuit during the chop phase.

公开(公告)号：US20180062675A1

公开(公告)日：2018-03-01

申请号：US15801874

申请日：2017-11-02

Applicant: Analog Devices Global

Inventor： Patrick Pratt ,  Peadar Antony Forbes ,  David J. McLaurin ,  Martin McCormick

IPC: H04B1/04

CPC classification number: H04B1/0475 ,  H04B1/525

Abstract: Transmitter noise cancellation may be applied on a channel by channel basis to active channels of an incoming radio frequency signal received at a receiver. A noise cancellation filter may be provided for each active channel in a predetermined signal band. Applying noise cancellation on a per active channel basis instead of to the entire receive band may substantially reduce the filtering requirement and number of filter coefficients or taps to save power and reduce manufacturing costs. Channelized transmitter noise cancellers, multi transmitter-receiver cross coupling cancellers, and hybrid full signal band and channelized transmitter noise cancellers are also provided.

公开(公告)号：US20180062260A1

公开(公告)日：2018-03-01

申请号：US15611289

申请日：2017-06-01

Applicant: Analog Devices Global

Inventor： Ahmed I. Khalil ,  Mohamed A. Abdelsalam

IPC: H01Q3/26 ,  H04B17/12 ,  H04B5/00 ,  H01Q3/34 ,  H01Q21/22

CPC classification number: H01Q3/267 ,  H01Q3/34 ,  H01Q21/061 ,  H01Q21/22 ,  H04B5/0043 ,  H04B17/12

Abstract: Aspects of this disclosure relate to an array calibration system and method using probes disposed between antenna elements. In certain embodiments, the calibration is performed by measuring near-field relative phase and amplitude measurements of the antenna elements and using such relative measurements to adjust the amplitude and phase of the transceivers connected to the antenna elements. In some embodiments, each antenna element within a set of antenna elements transmits a signal that is received by a single probe, and the received signals are assessed to determine relative phase or amplitude measurements. In some embodiments, a single probe transmits a signal that is received by each antenna element within a set of antenna elements, and the received signals are assessed to determine relative phase and amplitude measurements.

公开(公告)号：US20180061569A1

公开(公告)日：2018-03-01

申请号：US15248775

申请日：2016-08-26

Applicant: Analog Devices Global

Inventor： Jan Kubík ,  Bernard Patrick Stenson ,  Shane Patrick Geary ,  Michael Noel Morrissey

IPC: H01F41/04 ,  H01F41/02 ,  H01F27/28 ,  H01F1/03

CPC classification number: H01F41/041 ,  H01F1/0315 ,  H01F27/2804 ,  H01F41/0206 ,  H01F41/046 ,  H01F2027/2809 ,  H01F2027/2819

Abstract: The disclosure relates to the manufacture of inductive components, in particular transformers, using a combination of microfabrication techniques and discrete component placement. By using a prefabricated core, the core may be made much thicker than one that is deposited using microfabrication techniques. As such, saturation occurs later and the efficiency of the transformer is improved. This is done at a much lower cost than the cost of producing a thicker core by depositing multiple layers using microfabrication techniques.