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公开(公告)号：US20200081465A1
公开(公告)日：2020-03-12
申请号：US16562141
申请日：2019-09-05
Applicant: Analog Devices Global Unlimited Company
Inventor： Jonathan Ephraim David Hurwitz
Abstract: A voltage-to-current converter can be configured to generate a current based on an input voltage and for part of the time use the generated current as the output current of the voltage-to-current converter, and for part of the time use the generated current as a current source for the operation of the voltage-to-current converter. This arrangement can reduce the need for high performance current mirror circuits within the voltage-to-current converter, thereby reducing the cost and complexity of the voltage-to-current converter and improving precision and accuracy.
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公开(公告)号：US20200059228A1
公开(公告)日：2020-02-20
申请号：US16238338
申请日：2019-01-02
Applicant: Analog Devices Global Unlimited Company
Inventor： Srivatsan Parthasarathy , Sirui Luo , Thomas Paul Kearney , Yuanzhong Zhou , Donal Bourke , Jean-Jacques Hajjar
IPC: H03K17/081 , H03K17/0412
Abstract: Fault tolerant switches are provided herein. In certain embodiments, a fault tolerant switch includes a switch, a gate driver, and a clamp. The switch includes a switch p-type field effect transistor (PFET) and a switch n-type field effect transistor (NFET) electrically connected in series and controlled by the gate driver. Additionally, the clamp is electrically connected in parallel with the switch, and includes a forward protection circuit including a first diode and a first clamp FET in series, and a reverse protection circuit including a second diode and a second clamp FET in series. The clamp further includes a first gate bias circuit configured to bias a gate of the first clamp FET and a second gate bias circuit configured to bias a gate of the second clamp FET.
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公开(公告)号：US10541604B2
公开(公告)日：2020-01-21
申请号：US15986346
申请日：2018-05-22
Applicant: Analog Devices Global Unlimited Company
Inventor： Christopher Peter Hurrell , Derek J. Hummerston
Abstract: Techniques for supplying a bias current to a load are provided. In certain examples, a circuit can include a level-shift capacitance, a current source, and a load configured to receive a bias current in a first state of the circuit. The current source and the level-shift capacitance can be coupled in series between the load and a supply voltage in the first state. In some examples, during a second state of the circuit, the level-shift capacitance can receive charge, and can be isolated from one of the load or the current source.
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公开(公告)号：US10536308B2
公开(公告)日：2020-01-14
申请号：US15784747
申请日：2017-10-16
Applicant: Analog Devices Global Unlimited Company
Inventor： Sudarshan Onkar , Michael O'Brien
Abstract: In a communication receiver circuit, an amplifier circuit can include an adjustable gain. A signal corresponding to a portion of a transmitted frame can be received, and a gain of the receiver circuit can be adjusted such as automatically, and such adjustment can be referred to as automatic gain control (AGC). An offset correction can be performed to adjust for an error in a received representation of a transmitted carrier, and such offset correction can be referred to as carrier frequency offset (CFO) correction. A portion of the received signal can be dynamically allocated between AGC and CFO correction, such as allocating a longer duration to CFO correction when AGC results in a relatively higher receiver gain, and allocating a shorter duration to CFO correction when AGC results in a relatively lower receiver gain.
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公开(公告)号：US10529518B2
公开(公告)日：2020-01-07
申请号：US15269086
申请日：2016-09-19
Applicant: Analog Devices Global
Inventor： Padraig Liam Fitzgerald , Srivatsan Parthasarathy , Javier A. Salcedo
Abstract: Micro-electromechanical switch (MEMS) devices can be fabricated using integrated circuit fabrication techniques and materials. Such switch devices can provide cycle life and insertion loss performance suiting for use in a broad range of applications including, for example, automated test equipment (ATE), switching for measurement instrumentation (such as a spectrum analyzer, network analyzer, or communication test system), and uses in communication systems, such as for signal processing. MEMS devices can be vulnerable to electrical over-stress, such as associated with electrostatic discharge (ESD) transient events. A solid-state clamp circuit can be incorporated in a MEMS device package to protect one or more MEMS devices from damaging overvoltage conditions. The clamp circuit can include single or multiple blocking junction structures having complementary current-voltage relationships, such as to help linearize a capacitance-to-voltage relationship presented by the clamp circuit.
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Patent Agency Ranking
公开(公告)号：US20200003875A1
公开(公告)日：2020-01-02
申请号：US16430391
申请日：2019-06-03
Applicant: Analog Devices Global Unlimited Company
Inventor： Yalcin Alper EKEN , Mehmet Arda Akkaya , Alp OGUZ
Abstract: Mechanisms for evaluating amplitude for current pulses provided to a transimpedance amplifier (TIA) for current levels beyond the linear range of the TIA where clipping circuit(s) may limit the input voltage of the TIA are disclosed. In one aspect, an example TIA arrangement includes a clipping arrangement that includes multiple clipping circuits. Each clipping circuit can be biased by different bias voltages such that the different clipping circuits are activated at different input current amplitudes. Different clipping circuits can have different impedances, which can result in different recovery time characteristics. With the multiple clipping circuits in clipping arrangements discussed herein, a saturated dynamic range of a TIA can be divided into sub-regions and different pulse widening characteristics for each region may be defined, which may enable determination of amplitude for current pulses provided to the TIA even for current levels beyond the linear range of the TIA.
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公开(公告)号：US10523166B2
公开(公告)日：2019-12-31
申请号：US15616062
申请日：2017-06-07
Applicant: Analog Devices Global
Inventor： Jonathan Ephraim David Hurwitz
Abstract: An amplifier circuit having improved common mode rejection is provided. This can be achieved by estimating the common mode value of an input signal and using this to adjust a target common mode voltage at the output of the amplifier. This can help avoid the differential gain becoming modified by the common mode voltage.
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公开(公告)号：US20190386504A1
公开(公告)日：2019-12-19
申请号：US16011450
申请日：2018-06-18
Applicant: Analog Devices Global Unlimited Company
Inventor： Suyi YAO , Yanfeng Lu , Ruo Mo
Abstract: The subject disclosure provides for harvesting energy and converting the harvested energy with high efficiency for multiple power rails to a system load. For example, harvested energy is converted to a regulated output for a first power rail when the harvested energy satisfies a maximum power point tracking (MPPT) threshold, where the MPPT threshold corresponds to a high conversion efficiency. When the harvested energy drops below the MPPT threshold, the regulated output can be driven with stored energy associated with a second power rail from a super capacitor charged with the harvested energy during a high efficiency phase. This helps maintain the high conversion efficiency at the regulated output. In the event that the super capacitor does not have sufficient stored energy, a backup battery may drive the regulated output associated with a third power rail while still maintaining the high conversion efficiency at the regulated output.
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309.发明申请公开(公告)号：US20190383643A1
公开(公告)日：2019-12-19
申请号：US16008869
申请日：2018-06-14
Applicant: Analog Devices Global Unlimited Company
Inventor： Jochen Schmitt , Enda Joseph Nicholl
Abstract: A system includes a magnetic sensor that can store a magnetic state associated with a number of accumulated turns of a magnetic target. The magnetic sensor may work in conjunction with a magnetic target. The magnetic target may produce a magnetic field that, at some positions, drops below a magnetic window of the magnetic sensor. The magnetic target may produce a magnetic field that is within the magnetic window when needed to update the magnetic state of the sensor to keep track of the accumulated turns of the magnetic target. The magnetic sensor may be initialized with one or more domain walls.
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公开(公告)号：US20190355383A1
公开(公告)日：2019-11-21
申请号：US16515018
申请日：2019-07-17
Applicant: Analog Devices Global Unlimited Company
Inventor： Mikael 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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