Patents Assigned to Analog Device, Inc.
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Patent number: 10855302Abstract: 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.Type: GrantFiled: December 23, 2019Date of Patent: December 1, 2020Assignee: ANALOG DEVICES, INC.Inventor: Ahmed Mohamed Abdelatty Ali
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Patent number: 10848169Abstract: Non-idealities of input circuitry of a receiver signal chain can significantly degrade the overall performance of the receiver signal chain. To meet high performance requirements, the input circuitry is typically implemented with power hungry circuitry in a different semiconductor technology from the analog-to-digital converter that the input circuitry is driving. With suitable optimization techniques, performance requirements on the input circuitry can be reduced while meeting target performance of the receiver signal chain. Specifically, optimization techniques can compensate for input frequency-dependent properties and/or amplitude-dependent properties of the input circuitry. In some cases, reducing performance requirements on the input circuitry means that the input circuitry can be implemented in the same semiconductor technology as the analog-to-digital converter.Type: GrantFiled: March 20, 2019Date of Patent: November 24, 2020Assignee: ANALOG DEVICES, INC.Inventors: Gabriele Manganaro, Nevena Rakuljic
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Patent number: 10848161Abstract: Apparatus and methods for clock synchronization and frequency translation are provided herein. Clock synchronization and frequency translation integrated circuits (ICs) generate one or more output clock signals having a controlled timing relationship with respect to one or more reference signals. The teachings herein provide a number of improvements to clock synchronization and frequency translation ICs, including, but not limited to, reduction of system clock error, reduced variation in clock propagation delay, lower latency monitoring of reference signals, precision timing distribution and recovery, extrapolation of timing events for enhanced phase-locked loop (PLL) update rate, fast PLL locking, improved reference signal phase shift detection, enhanced phase offset detection between reference signals, and/or alignment to phase information lost in decimation.Type: GrantFiled: June 19, 2018Date of Patent: November 24, 2020Assignee: Analog Devices, Inc.Inventor: Reuben P. Nelson
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Patent number: 10848109Abstract: A power amplifier circuit for broadband data communication over a path in a communication network can reduce or avoid gain compression, provide low distortion amplification performance, and can accommodate a wider input signal amplitude range. A dynamic variable bias current circuit can be coupled to a differential pair of transistors to provide a dynamic variable bias current thereto as a function of input signal amplitude. Bias current is increased when input signal amplitude exceeds a threshold voltage established by an offset or level-shifting circuit. The frequency response of the bias current circuit can track the full frequency content of the input signal, rather than its envelope. Gain degeneration can be modulated in concert with the bias current modulation to stabilize amplifier gain.Type: GrantFiled: July 25, 2019Date of Patent: November 24, 2020Assignee: Analog Devices, Inc.Inventor: Christopher John Day
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Patent number: 10847239Abstract: A dynamic error introduced by track-and-hold circuits can be reduced by using an input signal derivative to perform linear extrapolation during the hold period, allowing the output of the track-and-hold circuit to provide improved performance in reconstructing an undistorted input waveform, or to perform other applications such as demultiplexing. As described herein, a track-and-hold circuit and related techniques can include use of a first-order (e.g., linear) extrapolation. A first-order extrapolation can better approximate or reconstruct a signal during a specified hold duration, as compared to a zeroth-order technique. Use of analog circuits to implement the first-order extrapolation can one or more of reduce complexity of a circuit implementation or improve performance, such as by not requiring digital signal processing circuitry in performing the extrapolation.Type: GrantFiled: September 17, 2018Date of Patent: November 24, 2020Assignee: ANALOG DEVICES, INC.Inventor: Andrew T. K. Tang
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Patent number: 10845839Abstract: A current mirror arrangement with a current mirror and a double-base current circulator is disclosed. The current mirror is configured to receive an input current (IIN) and generate a mirrored current (IM), where IM=K*IIN. The current circulator, coupled to the current mirror, is configured to convey the mirrored current to an output node of the arrangement. The current circulator is a double-base current circulator and includes a first branch configured to receive a first branch current (I1b), where I1b=m*IM, where m is a positive number less than 1, and further includes a second branch configured to receive a second branch current (I2b), where I2b=(1?m)*IM. The first branch includes a cascode of transistors Q3 and Q5, configured to provide I1b to an output node. The second branch includes a transistor Q4 configured to provide I2b to the output node, where it is combined with I1b.Type: GrantFiled: September 13, 2019Date of Patent: November 24, 2020Assignee: ANALOG DEVICES, INC.Inventors: Devrim Aksin, Omid Foroudi
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Publication number: 20200365335Abstract: Systems and methods involving nanomaterial-based electrodes, such as supercapacitor and battery electrodes that can be flexible, are described.Type: ApplicationFiled: May 14, 2020Publication date: November 19, 2020Applicants: Massachusetts Institute of Technology, Analog Devices, Inc.Inventors: Karen K. Gleason, Brian L. Wardle, Estelle Cohen, Yue Zhou, Xiaoxue Wang, Yosef Stein
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Publication number: 20200363312Abstract: Device for improving an optical detecting smoke apparatus and implementing thereof. Apparatus and methods for detecting the presence of smoke in a small, long-lasting smoke detector are disclosed. Specifically, the present disclosure shows how to build one or more optimized blocking members in a smoke detector to augment signal to noise ratio. This is performed while keeping the reflections from the housing structure to a very low value while satisfying all the other peripheral needs of fast response to smoke and preventing ambient light. This allows very small measurements of light scattering of the smoke particles to be reliable in a device resistant to the negative effects of dust. In particular, geometrical optical elements, e.g., cap and optical defection elements, are disclosed.Type: ApplicationFiled: March 20, 2020Publication date: November 19, 2020Applicant: Analog Devices, Inc.Inventor: Shrenik DELIWALA
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Publication number: 20200366306Abstract: Disclosed herein are some examples of algorithmic analog-to-digital converters (AADCs) that perform noise shaping. In particular, an AADC disclosed herein includes circuitry that can store residue(s) of one or more conversion cycles produced by the AADC and apply a value corresponding to the residue(s) to a subsequent conversion cycle. The AADC may perform a filtering procedure with the residue(s) to produce the value applied to the subsequent conversion. Applying the value to the subsequent conversion cycle can increase a signal-to-noise ratio of the signal that the AADC is converting in the subsequent conversion cycle.Type: ApplicationFiled: May 12, 2020Publication date: November 19, 2020Applicant: Analog Devices, Inc.Inventor: Abhishek BANDYOPADHYAY
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Patent number: 10841107Abstract: According to various aspects, a delay-based physical unclonable function (PUF) device is provided. According to one embodiment, the PUF device includes circuitry for generating output bits of entropy by comparing, or “racing”, a plurality of PUF cells. A PUF cell is a building block of the PUF device. For example, the PUF device may include two identically designed circuits with only process related variations and each circuit can be a PUF cell. According to another aspect, if PUF cells with same history of winning or losing are being compared in a race, adversaries cannot predict the outcome of the current race based on previous race results. Accordingly, systems and methods are described herein for generating multiple rounds of races based on the previous rounds of races. Thus, one PUF cell can be used in multiple pairwise comparisons while maximal entropy is extracted.Type: GrantFiled: November 20, 2017Date of Patent: November 17, 2020Assignee: Analog Devices, Inc.Inventors: Tze Lei Poo, Sadaf Ahmad
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Patent number: 10840933Abstract: A multi-input analog-to-digital converter (ADC), i.e., a single ADC, can receive multiple analog input signals and generate multiple digital outputs. To combine multiple analog input signals into a single multi-input ADC, the multi-input ADC would typically include multiple track and hold (T/H) circuits and an adder, which can consume a significant amount of power and incur large cost overhead. An improved approach is to combine multiple inputs through a unique T/H circuit in the front-end of the ADC. The multiple analog input signals can be aggregated using code sequences, without requiring a significant amount of external circuits.Type: GrantFiled: November 16, 2018Date of Patent: November 17, 2020Assignee: ANALOG DEVICES, INC.Inventors: Ahmed Mohamed Abdelatty Ali, Frank Murden
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Patent number: 10841491Abstract: Aspects of the embodiments are directed to passive depth determination. Initially, a high power depth map of a scene can be created. An object in the scene can be identified, such as a rigid body or other object or portion of an object. A series of lower power or RGB images can be captured. The object can be located in one or more of the lower power or RGB images. A change in the position of an object, represented by a set of pixels, can be determined. From the change in position of the object, a new depth of the object can be extrapolated. The extrapolated depth of the object can be used to update the high power depth map.Type: GrantFiled: March 14, 2017Date of Patent: November 17, 2020Assignee: Analog Devices, Inc.Inventors: Charles Mathy, Sefa Demirtas, Bin Huo, Dhruvesh Gajaria, Jonathan Ari Goldberg, Nicolas Le Dortz, Tao Yu, James Noraky
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Publication number: 20200358434Abstract: The trend in wireless communication receivers is to capture more and more bandwidth to support higher throughput, and to directly sample the radio frequency (RF) signal to enable re-configurability and lower cost. Other applications like instrumentation also demand the ability to digitize wide bandwidth RF signals. These applications benefit from input circuitry which can perform well with high speed, wide bandwidth RF signals. An input buffer and bootstrapped switch are designed to service such applications, and can be implemented in 28 nm complementary metal-oxide (CMOS) technology.Type: ApplicationFiled: July 26, 2020Publication date: November 12, 2020Applicant: Analog Devices, Inc.Inventor: Lawrence A. SINGER
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Publication number: 20200356521Abstract: Disclosed herein are systems and techniques for serial peripheral interface (SPI) functionality for node transceivers in a two-wire communication bus. For example, in some embodiments, a node transceiver may include SPI circuitry and upstream or downstream transceiver circuitry. SPI commands received via the SPI circuitry may be executed by the node transceiver, or transmitted upstream or downstream along the two-wire bus for execution by another node transceiver or a slave device coupled to another node transceiver.Type: ApplicationFiled: May 8, 2019Publication date: November 12, 2020Applicant: Analog Devices, Inc.Inventors: Martin KESSLER, Lewis F. LAHR, William HOOPER
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Patent number: 10830610Abstract: This application discusses techniques for providing sensorless rotor position information of a multiple phase motor without using predetermined motor parameters or models, other than the number of phases of the motor. In certain examples, motor rotor position information can be provided using samples of current from zero-voltage vectors of the motor windings.Type: GrantFiled: September 26, 2016Date of Patent: November 10, 2020Assignee: Analog Devices, Inc.Inventors: Brendan Aengus Murray, Jens Engen Sorensen
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Patent number: 10834806Abstract: Systems and methods are provided for an automatic exposure detection feature for adding to an x-ray panel readout device, including an imaging panel having a low power mode, a sense circuit for receiving an input signal in the low power mode and restricting an input signal voltage to a first voltage, and a sensor for sensing a change in the input signal voltage, wherein the change in input signal voltage indicates exposure to an x-ray signal.Type: GrantFiled: May 31, 2018Date of Patent: November 10, 2020Assignee: ANALOG DEVICES, INC.Inventor: Gary R. Carreau
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Patent number: 10833522Abstract: Various examples are directed to integrated circuits and/or controllers for battery packs. An integrated circuit for managing at least a portion of a battery pack comprises a first cell controller. The first cell controller may comprise a first switch system, a first local controller, a first receive terminal to receive a first command from a preceding cell controller, and a first transmit terminal to send the first command to a succeeding cell controller. The first switch system may comprise two pairs of switches to couple a first battery cell to a pair of output terminals in an H-bridge configuration. The first local controller may control the first switch system to selectively connect and disconnect the first battery cell to the pair of output terminal.Type: GrantFiled: March 7, 2017Date of Patent: November 10, 2020Assignee: Analog Devices, Inc.Inventors: James Camp, Thomas M. MacLeod
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Patent number: 10830693Abstract: System and apparatus for portable gas detection. Specifically, this disclosure describes apparatuses and systems for optical gas detection in a compact package. There is a need for a very compact, low-power, gas detection system for gases such as CO2, NOx, water vapor, methane etc. This disclosure provides an ultra-compact and highly efficient optical measurement system based on principals of optical absorption spectroscopy. It reduces the size of the instrument as well its power consumption by more than an order of magnitude making it possible to deploy it widely. There is an identified need for large number of distributed gas sensors to improve human health, environment, and save energy usage.Type: GrantFiled: May 30, 2018Date of Patent: November 10, 2020Assignee: Analog Devices, Inc.Inventor: Shrenik Deliwala
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Publication number: 20200350921Abstract: Random chopping is an effective technique for data converters. Random chopping can calibrate offset errors, calibrate offset mismatch in interleaved ADCs, and dither even order harmonics. However, the non-idealities of the (analog) chopper circuit can limit its effectiveness. If left uncorrected, these non-idealities cause severe degradation in the noise floor that defeats the purpose of chopping, and the non-idealities may be substantially worse than the non-idealities that chopping is meant to fix. To address the non-idealities of the random chopper, calibration techniques can be applied, using correlators and calibrations that may already be present for the data converter. Therefore, the cost and digital overhead are negligible. Calibrating the chopper circuit can make the chopping more effective, while relaxing the design constraints imposed on the analog circuitry.Type: ApplicationFiled: July 13, 2020Publication date: November 5, 2020Applicant: Analog Devices, Inc.Inventors: Ahmed Mohamed Abdelatty ALI, Bryan S. PUCKETT
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Publication number: 20200345278Abstract: Herein disclosed is a system that may be implemented within a headphone to facilitate hearing testing. Implementation of the system in the headphone may include implementation of tone generation circuitry and sound pressure level measurement circuitry being implemented in the headphone limiting the amount of calibration for accurate measurement when performing a hearing test.Type: ApplicationFiled: April 30, 2020Publication date: November 5, 2020Applicant: Analog Devices, Inc.Inventor: Mikael MORTENSEN
