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公开(公告)号：US09985608B2
公开(公告)日：2018-05-29
申请号：US14863901
申请日：2015-09-24
Applicant: ANALOG DEVICES GLOBAL
Inventor： Sudarshan Onkar , Philip P. E. Quinlan , Kenneth J. Mulvaney
CPC classification number: H03H17/0283 , H03H17/04 , H03H2017/0245 , H03H2017/0488
Abstract: Embodiments of the present disclosure provide a digital filter module for use in receivers, particularly suitable for use in a narrow-band electromagnetic receiver. Design of the module is based on a recognition that providing to the module samples of a signal received by a receiver and sampled at a sampling frequency equal to four times the intermediate frequency of the receiver, eliminating zeros in the filter, and implementing the filter module as a resource-shared second-order filter structure that includes two sections advantageously enables saving some hardware components, particularly some multipliers and adders, in implementing a versatile digital filter module that can function either as two real filters or one complex filter. In this manner, substantial reduction of area and power consumption of the filter module may be achieved, while maintaining sufficiently high filtering performance.
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公开(公告)号：US09673962B1
公开(公告)日：2017-06-06
申请号：US15045826
申请日：2016-02-17
Applicant: Analog Devices Global
CPC classification number: H04L7/0008 , H04L7/033 , H04L7/0331 , H04L7/046
Abstract: An apparatus comprising: a signal detection circuit determine a count reached by a counter between successive detected edge signals and to provide an indication of whether successive detected edge signals are separated from each other by at least a prescribed time interval; a clock circuit that produces clock signal pulses in response to a provided indication of an occurrence of a succession of detected edge signals each separated from a previous edge signal of the succession by at least the prescribed time interval; phase matching circuitry configured to align the produced clock signal pulses with detected edge signals; and a pattern matching circuit that that samples a sequence of detected edge signals aligned with the produced clock signal pulses to detect a data packet.
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公开(公告)号：US10129011B2
公开(公告)日：2018-11-13
申请号：US15605082
申请日：2017-05-25
Applicant: Analog Devices Global
Abstract: An apparatus comprising: a signal detection circuit determine a count reached by a counter between successive detected edge signals and to provide an indication of whether successive detected edge signals are separated from each other by at least a prescribed time interval; a clock circuit that produces clock signal pulses in response to a provided indication of an occurrence of a succession of detected edge signals each separated from a previous edge signal of the succession by at least the prescribed time interval; phase matching circuitry configured to align the produced clock signal pulses with detected edge signals; and a pattern matching circuit that that samples a sequence of detected edge signals aligned with the produced clock signal pulses to detect a data packet.
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公开(公告)号：US10939379B2
公开(公告)日：2021-03-02
申请号：US15809520
申请日：2017-11-10
Applicant: Analog Devices Global
Inventor： Philip P. E. Quinlan , Paul Lambkin
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.
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