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公开(公告)号：US20180183634A1
公开(公告)日：2018-06-28
申请号：US15892002
申请日：2018-02-08
Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Inventor： Fenghao MU , Lars SUNDSTRÖM
Abstract: A technique for cancelling or reducing crosstalk signals between controlled oscillators in an integrated circuit is provided. The technique involves an arrangement adapted to reduce a crosstalk signal generated by a first controlled oscillator to a second oscillator both comprised in the integrated circuit, wherein both controlled oscillators are configured to output a respective clock signal. The arrangement comprises a detector adapted to detect the crosstalk signal generated by the first controlled oscillator to the second controlled oscillator, a crosstalk cancellation circuit adapted to generate a cancellation signal having an amplitude substantially the same as that of the crosstalk signal and a phase substantially opposite to that of the crosstalk signal, and a cancellation signal injector adapted to introduce the cancellation signal into the second controlled oscillator.
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公开(公告)号：US20180145716A1
公开(公告)日：2018-05-24
申请号：US15788840
申请日：2017-10-20
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kota SAITO , Yoshihiro IMANISHI , Hiroshi KITADA , Hiroyuki TAKATSUJI , Masashi OMURO
Abstract: A signal transmission and reception element transmits and receives a differential signal. Two transmission lines transmit the differential signal between the signal transmission and reception element and a connector. The signal transmission and reception element is connected to an external apparatus with the connector interposed therebetween. A noise generation source generates noise in a wireless band, which is coupled to the transmission lines. An antenna has a gain in a frequency band of the noise which is generated in the noise generation source. A wireless signal processing circuit processes a signal received by the antenna. An absorption-type filter that is mounted on the transmission lines absorbs noise mixed in the transmission lines.
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公开(公告)号：US09973286B2
公开(公告)日：2018-05-15
申请号：US15273207
申请日：2016-09-22
Applicant: RAYTHEON COMPANY
Inventor： John Strawn Ward
CPC classification number: H04B15/04 , H01Q1/005 , H01Q1/1242 , H01Q3/30 , H04B1/40 , H04B17/21 , H04B17/336
Abstract: System and method for correcting a phase noise generated by vibration of an antenna transmitting or receiving a radio frequency (RF) signal in a signal propagation direction includes: measuring the vibration of the antenna by a sensor generating an output signal; converting the output signal of the sensor to a measurement signal proportional to the vibration of the antenna in the signal propagation direction; performing a single or double integral of the measurement signal to produce a control signal with an amplitude proportional to the vibrational velocity or displacement of the antenna in the signal propagation direction; and applying the control signal to an oscillator, a clock signal, or a phase controller associated with the RF signal.
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公开(公告)号：US20180102800A1
公开(公告)日：2018-04-12
申请号：US15834047
申请日：2017-12-06
Applicant: LINEAR TECHNOLOGY CORPORATION
Inventor： Michael Thomas Engelhardt
IPC: H04B1/04
CPC classification number: H04B1/0475 , H03H11/53 , H04B15/04
Abstract: A method and system of providing an active differential resistor. The active differential resistor includes a diode having a first node and a second node. There is a capacitor coupled in series between the first node of the diode and an input of the active differential resistor. There is a current source coupled across the first node and the second node of the diode and configured to forward bias the diode such that a Johnson-Nyquist noise of the active differential resistor is replaced by a shot noise.
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公开(公告)号：US09905262B2
公开(公告)日：2018-02-27
申请号：US14918614
申请日：2015-10-21
Inventor： Jonathan Cottinet , Jean Claude Bini
CPC classification number: G11B20/10222 , G06F3/165 , H04B15/04 , H04B2215/065 , H04L7/04
Abstract: A method for transmitting and/or receiving a potential aggressor audio signal includes a transmission and/or a reception of successive groups of data timed by a first clock signal within respective successive frames synchronized by a second clock signal. In the presence of a risk of interference of the potential aggressor audio signal with a different, potential victim, signal, during the transmission or reception of the potential aggressor audio signal, the frequency of the first clock signal is modified while keeping the frequency of the second clock signal unchanged.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20170366279A1
公开(公告)日：2017-12-21
申请号：US15444774
申请日：2017-02-28
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Kensuke NAKANISHI , Hiroki MORI , Takeshi KUMAGAYA , Takahisa KAIHOTSU , Daisuke YASHIMA
IPC: H04B15/04 , H04B1/16 , H04B1/04 , H04W16/14 , H04B17/345
CPC classification number: H04B15/04 , H04B1/04 , H04B1/16 , H04B17/345 , H04W16/14
Abstract: A signal detection device according to the embodiment of the present invention includes a memory and processing circuitry. The memory is configured to store a program. The processing circuitry is for executing the program and is configured to calculate a first signal level indicative of a signal level of a digital complex signal; calculate a first variation indicative of a temporal variation of the first signal level; calculate a statistic in a predetermined first time period on the basis of the first variation within the first time period; and determine, on the basis of the statistic in the first time period, whether or not an interference source signal indicative of a signal of a radio wave coming from an interference source is included in the digital complex signals within the first time period.
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公开(公告)号：US09787415B2
公开(公告)日：2017-10-10
申请号：US13826365
申请日：2013-03-14
Applicant: Analog Devices, Inc.
Inventor： Jianxun Fan , Reza Alavi , Steven R. Bal , David J. McLaurin
Abstract: A method and apparatus for estimating and compensating TX LO leakage using circuitry on a loopback path connecting the transmitter and receiver are provided. The TX LO leakage may be estimated by measuring the DC signal on the receiver, measuring the phase difference between the received LO signal and the receiver LO signal, and filtering LO harmonics that may arise from the use of non-linear mixers. The DC signal on the receiver may be measured by opening and closing the loopback path, or changing the gain of the loopback path, or flipping the phase of looped back TX signal. The method may be used in an initialization or tracking calibration scheme.
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公开(公告)号：US09742447B2
公开(公告)日：2017-08-22
申请号：US14969524
申请日：2015-12-15
Applicant: Yasuhiro Izawa
Inventor： Yasuhiro Izawa
CPC classification number: H04B1/0475 , H03C3/0916 , H03C3/0975 , H03L7/18 , H04B15/04
Abstract: A clock signal generating apparatus detects a phase difference between an input reference clock signal and a feedback signal to output a control signal based on the phase difference, generates the clock signal with a frequency based on the output control signal, generates a pattern by switching, at a certain time interval, between a plurality of patterns of a second phase shift amount, adds a first phase shift amount to the second phase shift amount having the generated pattern, determines a phase to be selected, so that a cycle of the phase-shifted clock signal matches the cycle of a clock signal changed by the first phase shift amount to which the second phase shift amount is added, selects the determined phase from among a plurality of phases, and generates a phase-shifted clock signal whose signal level changes in the selected phase for output as the feedback signal.
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公开(公告)号：US09660737B2
公开(公告)日：2017-05-23
申请号：US14705389
申请日：2015-05-06
Applicant: Samsung Electronics Co., Ltd.
Inventor： Min Chull Paik , Hyun Hee Kim , Na Young Hwang
CPC classification number: H04B15/04 , H04B1/04 , H04B1/1027 , H04B1/18
Abstract: An electronic device which operates in response to multi-frequency bands is provided. The electronic device includes an antenna, a reception module configured to amplify a signal received through the antenna and distribute the amplified signal according to the multi-frequency bands, and a circuit unit configured to process signals included in the multi-frequency bands.
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公开(公告)号：US20170093604A1
公开(公告)日：2017-03-30
申请号：US14864060
申请日：2015-09-24
Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
Inventor： Toru DAN
Abstract: In one form, a spread spectrum clock generator includes a clock generator and a modulator. The clock generator modulates a frequency of a reference clock signal using a modulation signal to provide a spread spectrum clock signal. The clock generator has a characteristic transfer function. The modulator generates the modulation signal according to a desired profile conditioned by an inverse of the characteristic transfer function of the clock generator.
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