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81.发明授权公开(公告)号：US10439572B1
公开(公告)日：2019-10-08
申请号：US16053415
申请日：2018-08-02
Applicant: Analog Devices Global Unlimited Company
Inventor： Frederick Carnegie Thompson , Riccardo Tonietto
Abstract: An “all-digital” operational amplifier architecture, that does not have the constraint of maintaining devices in their saturation region, can leverage the high speed achievable by deeply scaled technology to replace traditional linear current referenced continuous-time operational amplifier circuits with CMOS-like dynamic circuits that require no referencing structure, have no static power consumption, and are compatible with ultra-low supply voltages. Techniques are described to replace analog continuous-time linear operational amplifier input and output stages by a discrete-time comparator circuit, e.g., CMOS-style, and a switched capacitor charge pump circuit, respectively.
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公开(公告)号：US10436882B2
公开(公告)日：2019-10-08
申请号：US15353955
申请日：2016-11-17
Applicant: Analog Devices Global Unlimited Company
Abstract: Embodiments of the present disclosure propose analog-to-digital conversion (ADC) systems particularly suitable for Light Detection and Ranging (LIDAR) implementations. An exemplary proposed ADC system is configured to determine whether an absolute value of an analog value is greater than a threshold, and, upon positive determination, assign a predetermined digital value as a digital value corresponding to the analog value, without proceeding with the analog-to-digital conversion of the analog value. Because the ADC system only proceeds with the analog-to-digital conversion, using an ADC, when the input analog value is smaller than the threshold, and otherwise the input analog value is simply assigned some predefined digital value, design complexity and power consumption of the system may be significantly reduced, compared to conventional ADCs used in LIDAR applications.
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公开(公告)号：US20190306447A1
公开(公告)日：2019-10-03
申请号：US15940873
申请日：2018-03-29
Applicant: Analog Devices Global Unlimited Company
Inventor： Wayne PALMER , Pascal DORSTER , Peeyush BHATIA
Abstract: An image sensor can respond to light either linearly or logarithmically in order to achieve flexible and high contrast performance. This is made possible by using a programmable lookup table, or an array of numbers, that represents control parameter values of the image sensor. The control parameter values in the lookup table are programmable and could be kept constant, increase linearly, or non-linearly, between consecutive indexes. Photodiode control circuitry is used to adapt the response of the photodiodes in the image sensor depending on the lighting impacting upon the image sensor.
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公开(公告)号：US20190293799A1
公开(公告)日：2019-09-26
申请号：US16442173
申请日：2019-06-14
Applicant: Analog Devices Global Unlimited Company
Inventor： Yalcin Alper EKEN , Alp OGUZ
IPC: G01S17/93 , H03F3/45 , H03F1/26 , H03F1/32 , H03F1/08 , G01S7/486 , G01S7/483 , H04B10/69 , H03F3/08
Abstract: A system and method for operating a high dynamic range analog front-end receiver for long range LIDAR with a transimpedance amplifier (TIA) include a clipping circuit to prevent saturation of the TIA. The output of the clipping circuit is connected via a diode or transistor to the input of the TIA and regulated such that the input voltage of the TIA remains close to or is only slightly above the saturation threshold voltage of the TIA. The regulation of the input voltage of the TIA can be improved by connecting a limiting resistor in series with the diode or transistor. A second clipping circuit capable of dissipating higher input currents and thus higher voltages may be connected in parallel with the first clipping circuit. A resistive element may be placed between the first and second clipping circuits to further limit the input current to the TIA.
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公开(公告)号：US10409312B1
公开(公告)日：2019-09-10
申请号：US16040207
申请日：2018-07-19
Applicant: Analog Devices Global Unlimited Company
Inventor： Sanjay Rajasekhar
Abstract: A duty cycled voltage reference circuit is turned on and off synchronously with the operation of a second, reference-consuming, duty-cycled circuit to which it supplies a reference. When the reference consuming circuit no longer has need of the reference, the voltage reference circuit itself is then also powered down. The reference circuit is then powered back up for the next duty cycle sufficiently in advance of the reference consuming circuit such that any auto-zeroing and noise filtering operations required by the reference circuit are complete and a stable reference voltage is output at least simultaneously with, or slightly before, the reference consuming circuit begins to make use of the voltage reference signal. In this manner, synchronous duty-cycled operation of the voltage reference circuit with the reference-consuming circuit is obtained, with the consequence that power consumption by the reference circuit is reduced.
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Patent Agency Ranking
公开(公告)号：US10360926B2
公开(公告)日：2019-07-23
申请号：US15321743
申请日：2015-07-07
Applicant: Analog Devices Global Unlimited Company
Inventor： Mikael M. Mortensen , Kim Spetzler Berthelsen , Robert Adams , Andrew Milia
Abstract: Many processes for audio signal processing can benefit from voice activity detection, which aims to detect the presence of speech as opposed to silence or noise. The present disclosure describes, among other things, leveraging energy-based features of voice and insights on first and second formant frequencies of vowels to provide a low-complexity and low-power voice activity detector. A pair of two channels is provided whereby each channel is configured to detect voice activity in respective frequency bands of interest. Simultaneous activity detected in both channels can be a sufficient condition for determining that voice is present. More channels or pairs of channels can be used to detect different types of voices to improve detection and/or to detect voices present in different audio streams.
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公开(公告)号：US10333543B1
公开(公告)日：2019-06-25
申请号：US15975885
申请日：2018-05-10
Applicant: Analog Devices Global Unlimited Company
Inventor： Christopher Peter Hurrell , Hongxing Li , Colin G. Lyden
Abstract: Techniques that allow application of noise-shaped dither without applying dither at sampling, resulting in the analog-to-digital converter (ADC) circuit advantageously being balanced during acquisition. Balancing the ADC circuit at acquisition can reduce the risk of sampling digital interferences that can couple in through the references or substrates.
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公开(公告)号：US20190182445A1
公开(公告)日：2019-06-13
申请号：US16127553
申请日：2018-09-11
Applicant: Analog Devices Global Unlimited Company
Abstract: Embodiments of the present disclosure provide ADCs particularly suitable for PDAF image sensors, which ADCs may have an increased speed and/or reduced design complexity and power consumption compared to conventional implementations. An example ADC for a PDAF image sensor is configured to implement modified SAR techniques which reduce the number of bit trials required for conversion, and enable increased number of samples in a row-conversion time period of the image sensor. The ADC may implement the modified SAR techniques in combination with CMS in pixel readout signal chain, which may reduce noise without a proportionate increase in ADC sample rate.
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公开(公告)号：US10236905B1
公开(公告)日：2019-03-19
申请号：US15901177
申请日：2018-02-21
Applicant: Analog Devices Global Unlimited Company
Inventor： Andreas Callanan , Adrian Sherry , Gabriel Banarie , Colin G. Lyden
Abstract: Techniques to increase a data throughput rate of a filter circuit by preloading selectable memory circuits of the filter circuit with reference data, sampling input data at an input of the filter circuit, combining the sampled input data with the preloaded reference data, and generating a filter output based on the combined sampled input data and preloaded reference data.
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公开(公告)号：US10187075B1
公开(公告)日：2019-01-22
申请号：US15974548
申请日：2018-05-08
Applicant: Analog Devices Global Unlimited Company
Inventor： Sharvil Pradeep Patil , Hajime Shibata , Yunzhi Dong , David Nelson Alldred , Frank Murden , Lawrence A. Singer
Abstract: Residue generation systems for use in continuous-time and hybrid ADCs are described. An exemplary system includes a filter, e.g. a FIR filter, for generating a filtered analog output based on an analog input, a quantizer for generating a digital input to a feedforward DAC based on the filtered analog output generated by the filter, a feedforward DAC for generating a feedforward path analog output based on the digital input generated by the quantizer, and a subtractor for generating a residue signal based on the feedforward path analog output. Providing a filter that filters the analog input before it is quantized advantageously allows blockers to be attenuated before they are sampled and aliased by the quantizer. At least some of the residue generation systems described herein may be implemented with relatively small design and power dissipation overheads.
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