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公开(公告)号：US20210058032A1
公开(公告)日：2021-02-25
申请号：US16546094
申请日：2019-08-20
Applicant: Analog Devices, Inc.
Inventor： Jiefeng Yan
Abstract: Differential electro-mechanical oscillating circuits are described. These circuits may be used in a variety of contexts to produce differential oscillating signals, such as sine waves or square waves. A switched capacitor circuit (SCC) is used to prevent low-frequency locking, whereby the output of the resonator would otherwise lock to a constant value. More specifically, the SCC provides an impedance in parallel to the resonator between the output terminals of oscillating circuit. The SCC is designed so that, at low frequencies, its impedance is lower than the impedance of the resonator. The presence of such an impedance prevents the formation of an open circuit between the output terminals, thus maintaining the oscillating circuit in the oscillation mode. The differential electro-mechanical oscillating circuits described herein may be used to produce clock signals or otherwise to produce periodic reference signals.
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公开(公告)号：US10932220B2
公开(公告)日：2021-02-23
申请号：US16659887
申请日：2019-10-22
Applicant: Analog Devices, Inc.
Inventor： Tao Yu , Tze Lei Poo , Lance Doherty , Philip P. E. Quinlan
Abstract: Systems and methods permit automatic joining of a network associated with a specified area within which wireless nodes reside. Network managers located in or near the specified area use wireless proximity detection to estimate distances to wireless nodes requesting to join the network. The network managers can use the estimated distances to determine whether or not a requesting wireless node is located within the specified area. If the requesting wireless node is located within the specified area, the network managers can permit the wireless node to join the wireless network associated with the respective specified area.
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143.发明授权公开(公告)号：US10931467B2
公开(公告)日：2021-02-23
申请号：US16279758
申请日：2019-02-19
Applicant: Analog Devices, Inc.
Inventor： John Ross Wallrabenstein
Abstract: A device comprising: a physical unclonable function (PUF) device configured to generate an output value based on hardware characteristics of the PUF device; and a processor connected to the PUF device, the processor configured to: execute a cryptographic operation in a sequence of ordered stages including a first stage and a second stage, the executing comprising: in the first stage: recovering a first secret value based on a first output value obtained from the PUF device; executing a first sub-operation using the first secret value; and removing unobscured values from memory prior to execution of a subsequent stage; in the second stage: recovering a second secret value based on a second output value obtained from the PUF device; and executing a second sub-operation using the second secret value to enable execution of a cryptographic operation encoded with at least the first secret value and the second secret value.
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公开(公告)号：US10914583B2
公开(公告)日：2021-02-09
申请号：US15900622
申请日：2018-02-20
Applicant: Analog Devices, Inc.
Inventor： Jiefeng Yan , William A. Clark
IPC: G01C19/5712 , G01C19/5776 , B81B7/00
Abstract: Sense amplifiers for use in connection with microelectromechanical system (MEMS) gyroscopes are described. The sense amplifiers may be configured to change the level of a gyroscope signal, i.e., the signal produced by a gyroscope in response to angular motion, to a level suitable for processing circuitry arranged to infer the angular velocity. The sense amplifier may further provide a DC discharge path allowing for discharge of the DC component of the output signal. The DC discharge path may include an anti-aliasing filter and a resistive circuit. The anti-aliasing filter may filter the output signal to maintain the resistive circuit in the linear region. The anti-aliasing filter may be designed with a frequency response such that discrete frequency sub-bands are blocked or at least attenuated. The frequency sub-bands may be tuned to substantially match the gyroscope's resonant frequency and its integer multiples.
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公开(公告)号：US10861845B2
公开(公告)日：2020-12-08
申请号：US15370912
申请日：2016-12-06
Applicant: ANALOG DEVICES, INC.
Inventor： Javier Alejandro Salcedo , Srivatsan Parthasarathy
Abstract: In certain configurations, an input/output (IO) interface of a semiconductor chip includes a pin, an interface switch connected to the pin, and an overstress detection and active control circuit that controls a resistance of the interface switch with active feedback. The overstress detection and active control circuit increases a resistance of the interface switch in response to detection of a transient overstress event between a first node and a second node. Accordingly, the overstress detection and active control circuit provides separate detection and logic control to selectively modify the resistance of the interface switch such that the interface switch operates with low resistance during normal operating conditions and with high resistance during overstress conditions.
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Patent Agency Ranking
公开(公告)号：US10856199B2
公开(公告)日：2020-12-01
申请号：US16239798
申请日：2019-01-04
Applicant: Analog Devices, Inc.
Inventor： Martin Kessler
Abstract: Disclosed herein are systems and techniques for auxiliary master and/or auxiliary call support functionality. For example, in some embodiments, a communication system with auxiliary master functionality may include a master node coupled to a plurality of downstream slave nodes, wherein at least one of the slave nodes may perform master node functions when the master node is disconnected from the system.
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公开(公告)号：US10855302B2
公开(公告)日：2020-12-01
申请号：US16725483
申请日：2019-12-23
Applicant: Analog Devices, Inc.
Inventor： Ahmed Mohamed Abdelatty Ali
IPC: H03M1/10
Abstract: Improved track and hold (T/H) circuits can help analog-to-digital converters (ADCs) achieve higher performance and lower power consumption. The improved T/H circuits can drive high speed and interleaved ADCs, and the design of the circuits enable additive and multiplicative pseudo-random dither signals to be injected in the T/H circuits. The dither signals can be used to calibrate (e.g., linearize) the T/H circuits and the ADC(s). In addition, the dither signal can be used to dither any remaining non-linearity, and to calibrate offset/gain mismatches in interleaved ADCs. The T/H circuit design also can integrate an amplifier in the T/H circuit, which can be used to improve the signal-to-noise ratio (SNR) of the ADC or to act as a variable gain amplifier (VGA) in front of the ADC.
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公开(公告)号：US10852136B2
公开(公告)日：2020-12-01
申请号：US15690504
申请日：2017-08-30
Applicant: Analog Devices, Inc.
Inventor： Jiefeng Yan , Ronald A. Kapusta, Jr. , Jianrong Chen
IPC: G01R23/14 , G01C19/5726 , G01C19/5755
Abstract: A method for detecting frequency mismatch in microelectromechanical systems (MEMS) gyroscopes is described. Detection of the frequency mismatch between a drive signal and a sense signal may be performed by generating an output signal whose spectrum reflects the physical characteristics of the gyroscope, and using the output signal to determine the frequency fC of the sense signal. The output signal may be generated by cross-correlating a random or pseudo-random noise signal with a response signal, where the response signal can be obtained by allowing the noise signal to pass through a system designed to have a noise transfer function that mimics the frequency response of the gyroscope. Since the noise signal is random or pseudo-random, cross-correlating the noise signal with the response signal reveals spectral characteristics of the gyroscope. To improve computational efficiency, the cross-correlation can be performed on demodulated versions of the noise signal and the response signal.
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公开(公告)号：US20200375049A1
公开(公告)日：2020-11-26
申请号：US16827115
申请日：2020-03-23
Applicant: ANALOG DEVICES, INC.
Inventor： Adam T. Winter , Edward James Burg
Abstract: Various embodiments relate to an electrical feedthrough assembly an elongate conductor and a collar at least partially surrounding the elongate conductor along a portion of a length of the elongate conductor. The collar can be composed of a material having a thermal conductivity of at least 170 W/(m-K). A shell can be disposed around the collar. At one or more operating frequencies, at least a portion of a length of the electrical feedthrough assembly can be selected to provide at least one quarter wave transform.
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公开(公告)号：US20200373953A1
公开(公告)日：2020-11-26
申请号：US16989738
申请日：2020-08-10
Applicant: Analog Devices, Inc.
Inventor： Christopher E Hay , Eamon Nash
Abstract: A pair of programmable state machines may be included in a transmitter integrated circuit of a scanner (e.g. a body scanner) to control the sub-circuits of the transmitter integrated circuit. The first programmable state machine may be used to control the signal processor of the transmitter that facilitates generation of a signal to be transmitted at a target, such as a user to be scanned. The second programmable state machine may be used to control the transmitter's selection of a transmission channel for transmitting the signal in which provides the signal to be transmitted to an antenna. Further, the receiver integrated circuit of the scanner may include a similar pair of programmable state machines for controlling the receive signal processor and receiver of the receiver integrated circuit. The inclusion of the state machines can reduce both the scan time and the circuit complexity of the scanner.
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