Norwood, MA, United States
Norwood, MA, United States

Analog Devices, Inc., also known as ADI or Analog, is an American multinational semiconductor company specializing in data conversion and signal conditioning technology, headquartered in Norwood, Massachusetts. In 2012, Analog Devices led the worldwide data converter market with a 48.5% share, according to analyst firm Databeans.The company manufactures analog, mixed-signal and digital signal processing integrated circuits used in electronic equipment. These technologies are used to convert, condition and process real-world phenomena, such as light, sound, temperature, motion, and pressure into electrical signals.Analog Devices has approximately 60,000 customers, in the following industries: communications, computer, industrial, instrumentation, military/aerospace, automotive, and high-performance consumer electronics applications. Wikipedia.


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Patent
Analog Devices Inc. | Date: 2017-02-22

In one aspect, reduced power consumption and/or circuit area of a discrete time analog signal processing module is achieved in an approach that makes use of entirely, or largely, passive charge sharing circuitry, which may include configurable (e.g., after fabrication, at runtime) multiplicative scaling stages that do not require active devices in the signal path. In some examples, multiplicative coefficients are represented digitally, and are transformed to configure the reconfigurable circuitry to achieve a linear relationship between a desired coefficient and a degree of charge transfer. In some examples, multiple successive charge sharing phases are used to achieve a desired multiplicative effect that provides a large dynamic range of coefficients without requiring a commensurate range of sizes of capacitive elements.; The scaling circuits can be combined to form configurable time domain or frequency domain filters.


Patent
Analog Devices Inc. | Date: 2017-05-03

Embodiments of the present disclosure may provide a method of calibrating an isolator system. The method may comprise the steps of driving a common signal to a pair of input terminals of the isolator system; measuring differences in signals at output terminals of the isolator system; and varying impedance of impedance elements connected between the output terminals and a center-tap terminal of the isolator system until a mismatch at the output terminals is minimized.


Apparatus and methods for phase linearization and interpolation in rotary traveling wave oscillators (RTWOs) are provided. In certain configurations, an RTWO system includes a first elongated RTWO and a second elongated RTWO that are phase-locked to one another with a non-zero phase shift. The first and second elongated RTWOs each include two elongated sections of differential transmission line of high phase linearity. For example, such long and straight sections of the differential transmission lines can have uniform capacitance loading and avoid non-uniformities in length and/or thickness associated with poor phase linearity. The RTWO system further includes tap circuitry that receives clock signal phases from the elongated sections of the RTWOs. In certain implementations, the tap circuitry includes one or more interpolation circuits that interpolate received clock signal phases to increase the number of available phases. The RTWO system can include a large number of taps of high phase linearity.


Patent
Analog Devices Inc. | Date: 2017-06-21

For analog-to-digital converters (ADCs) which utilize a feedback digital-to-analog converter (DAC) for conversion, the final analog output can be affected or distorted by errors of the feedback DAC. A digital measurement technique can be implemented to determine switching mismatch error for the feedback DAC in a continuous-time delta-sigma modulator (CTDSM) or in a continuous-time pipeline modulator. The methodology forces each DAC unit elements (UEs) to switch a certain amount times and then use the modulator itself to measure the errors caused by those switching activities respectively. The obtained errors can be stored in a look-up table and fully corrected in digital domain or analog domain.


A method and apparatus for phase adjustment of a RF transceiver is disclosed. Based on a first local oscillator signal and a second local oscillator signal, a beat signal that indicates the frequency and phase relationship between the first and second local oscillator signals can be generated. Using the beat signal, changing phase relationship between the first and second local oscillator signals can be cumulatively taken account for using phase averaging to allow quick restoration to observation of a previously observed channel.


Patent
Analog Devices Inc. | Date: 2017-05-31

Present disclosure relates to a current detection module capable of differentiating and quantifying contribution to a current signal generated by a sensor in response to stimulation by a certain target source from contributions from sources other than the target source (ambient sources). As long as the contribution from the target source comprises a pulsed signal, the module synchronizes itself to the pulse(s) so that there is a predetermined phase relationship between the pulse(s) and functions carried out by various stages of the module. The module may be re-used to also detect and quantify contributions from ambient sources by presenting these contributions to the module as pulses that trigger synchronization of the module. To that end, a detection system disclosed herein is based on the use of such current detection module and allows mode switching where, depending on the selected mode of operation, the module is configured to perform different measurements.


Patent
Analog Devices Inc. | Date: 2017-05-03

A system, device, and method for binding metadata, such as information derived from the output of a biometric sensor, to hardware intrinsic properties by obtaining authentication-related metadata and combining it with information pertaining to a root of trust, such as a physical unclonable function. The metadata may be derived from a sensor such as a biometric sensor, the root of trust may be a physical unclonable function, the combination of the metadata and root of trust information may employ a hash function, and output from such a hash process may be used as an input to the root of trust. The combined information can be used in interactive or non-interactive authentication.


Patent
Analog Devices Inc. | Date: 2017-07-12

Angular accelerometers are described, as are systems employing such accelerometers. The angular accelerometers may include a proof mass and rotational acceleration detection beams directed toward the center of the proof mass. The angular accelerometers may include sensing capabilities for angular acceleration about three orthogonal axes. The sensing regions for angular acceleration about one of the three axes may be positioned radially closer to the center of the proof mass than the sensing regions for angular acceleration about the other two axes. The proof mass may be connected to the substrate though one or more anchors.


A multi-bit digital to analog converter comprising a plurality of unit cells, each providing an electrical signal to a common output at multiple levels in response to a respective control signal and a control system having multiple layers of branch circuits. Each branch circuit comprises a dynamic element matching circuit receiving a plurality of least significant bits of an input code to generate respective output signals to the control system and a plurality of branches, each receiving most significant bits of an input code to the respective layer and having an adder for the most significant bits of the layers input signal and a respective output from the dynamic element matching circuit. An input signal to the digital to analog converter is input to a first layer as that layers input code, input codes of the other layers are taken from output signals of preceding layers, and output signals of a last layer may be input to the unit cells as control signals.


Patent
Analog Devices Inc. | Date: 2017-07-05

For analog-to-digital converters (ADCs) which utilize a feedback digital-to-analog converter (DAC) for conversion, the final analog output can be affected or distorted by errors of the feedback DAC. A digital measurement technique can be implemented to determine timing mismatch error for the feedback DAC in a continuous-time delta-sigma modulator (CTDSM) or in a continuous-time pipeline modulator. The methodology utilizes cross-correlation of each DAC unit elements (UEs) output to the entire modulator output to measure its timing mismatch error respectively. Specifically, the timing mismatch error is estimated using a ratio based on a peak value and a value for the next tap in the cross-correlation function. The obtained errors can be stored in a look-up table and fully corrected in digital domain or analog domain.

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