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公开(公告)号：US20220216804A1
公开(公告)日：2022-07-07
申请号：US17701996
申请日：2022-03-23
Inventor： Naoaki NISHIMURA , Abhishek BANDYOPADHYAY
IPC: H02M7/5387
Abstract: Apparatus and method for establishing a stable operating point of a H-bridge with a center shunt switch. The stable operating point lets a circuit connected to the H-bridge outputs work in a more ideal condition. As such, an H-bridge with a stable operating point will yield a higher performance and/or save power. Since common mode is one of the biggest sources of electromagnetic interference, a stable operating point in an H-bridge also suppresses EMI.
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公开(公告)号：US11381203B2
公开(公告)日：2022-07-05
申请号：US17085372
申请日：2020-10-30
Inventor： Aritra Dey , Tolga Pamir , Mostafa Haroun
Abstract: A transmitter that reduces 3rd order harmonic (HD3) and inter modulation distortion (IMD3) for a gm stage of a mixer while reducing flicker noise is disclosed. The transmitter may include a balanced mixer, a transconductance stage connected to the mixer, and a bias circuit. The bias circuit may include a programmable current source configured to provide a reference current. Further, the bias circuit may include a replica circuit configured to replicate a DC signal of the transconductance stage. The bias circuit may also include a bias transistor configured to level shift a bias signal obtained from a signal source based on the reference current and the DC signal of the transconductance stage as determined from the replica circuit.
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公开(公告)号：US11374498B2
公开(公告)日：2022-06-28
申请号：US16918917
申请日：2020-07-01
Inventor： Charles Finger , Jian Li , Zhouyuan Shi , Xu Zhang
Abstract: A power domain isolation system, such as without requiring a transformer, can include a reactive circuit, an input network having first and second input nodes that are coupled in parallel with the reactive circuit via respective first and second current control circuits, and an output network having first and second output nodes that are coupled in parallel with the reactive circuit via respective third and fourth current control circuits. The first and second current control circuits can be configured to couple the reactive circuit to the input nodes when the third and fourth current control circuits are configured to electrically isolate the reactive circuit from the output nodes, and the first and second current control circuits can be configured to electrically isolate the reactive circuit from the input nodes when the third and fourth current control circuits are configured to couple the reactive circuit to the output nodes.
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公开(公告)号：US11366149B2
公开(公告)日：2022-06-21
申请号：US16936403
申请日：2020-07-22
Inventor： John Stuart , Seyed Amir Ali Danesh , Luca Martini
Abstract: The present disclosure relates to the determination of impedances in an electrical network. Methods and apparatuses for determining one or more impedances within a root and branch network are disclosed. The impedance of a common root part and the impedance of a branch of the electrical network may be determined based on the current in the common root part, the current in a branch of the electrical network and the voltage across the common root part and the branch. By determining the impedance of different parts of the electrical network in this way, the network may be monitored over time and the location of any faults or impending faults in the network may be identified more exactly without requiring invasive network probing and testing.
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公开(公告)号：US20220190852A1
公开(公告)日：2022-06-16
申请号：US17537724
申请日：2021-11-30
Inventor： Stephen SUMMERFIELD , Praveen CHANDRASEKARAN , Christopher MAYER
IPC: H04B1/04
Abstract: Systems, devices, and methods related to performing digital predistortion in radio frequency (RF) systems are provided. A digital predistortion (DPD) arrangement includes a DPD actuator circuit to predistort, using DPD coefficients, at least a portion of an input signal, the DPD coefficients associated with a characteristic of a nonlinear component. The DPD arrangement further includes a DPD capture circuit to perform, based on a capture cycle timing, multiple captures of a feedback signal, the feedback signal indicative of an output of the nonlinear component; compute, based on one or more characteristics of the multiple captures, one or more criteria for a subsequent capture of the feedback signal; and perform, based on the one or more criteria, the subsequent capture of the feedback signal. The DPD arrangement circuit further includes a DPD adaptation circuit to update the DPD coefficients based at least in part on the subsequent capture.
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Patent Agency Ranking
136.发明申请公开(公告)号：US20220132241A1
公开(公告)日：2022-04-28
申请号：US17571361
申请日：2022-01-07
Inventor： Dietmar RUWISCH
Abstract: A method and apparatus are provided for generating a directional output signal from sound received by at least two microphones arranged as microphone array. The method includes transforming the sound received by each of the microphones and represented by analog-to-digital converted time-domain signals into corresponding complex-valued frequency-domain microphone signals each having a frequency component value for each of a plurality of frequency components, calculating from the complex-valued frequency-domain microphone signals for a Beam Focus Direction a Beam Focus Spectrum by means of a Characteristic Function with values between zero and one, said Beam Focus Spectrum comprises, for each of the plurality of frequency components, a time-dependent, real-valued attenuation factor, multiplying, for each of the plurality of frequency components, the attenuation factor with the frequency component value of the complex-valued frequency-domain microphone signal to obtain a directional frequency component value, and forming a frequency-domain directional output signal.
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公开(公告)号：US20220126300A1
公开(公告)日：2022-04-28
申请号：US17621184
申请日：2020-06-22
Inventor： Christophe Antoine , Helen Berney , Bernard Stenson , Ramji Sitaraman Lakshmana , William Allan Lane , Himanshu Jain , Christina B. McLoughlin , Shane Geary , Michael C.W. Coln , Donal McAuliffe
IPC: B01L7/00
Abstract: The present disclosure relates to a microfabricated thermal platform. The platform is formed over a substrate, which may for example be a silicon wafer, and which may form part of the platform. The substrate is coated in a thermally-insulating material, which may be an organic polymer such, as polyimide or SU8. The thermally-insulating material may have a predetermined thermal conductivity, which is dependent on thickness, geometry and processing. The surface of the thermally-insulating material may include an arrangement of thermal sites, with each site having a reaction plate (or thermal plate) over which chemical reactions may occur. A heating element may be positioned beneath each reaction plate. The thermal platform may have a plurality of such thermal sites arranged over the upper surface of the thermally-insulating material. However, it will be appreciated that in practice, there could be a single thermal site. In use, the thermal platform may have a fluidic medium, such as a liquid or a gas, disposed over the thermal sites. One application for the thermal platform is in chemical and biological reactions. In such reactions, the fluidic medium may be an aqueous solution which comprises reagents for those reactions. The fluidic medium may be an ionically conducting fluid, organic solution or a gas. Precise temperature control enables the connect reactions to occur.
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138.发明申请公开(公告)号：US20220121234A1
公开(公告)日：2022-04-21
申请号：US16949234
申请日：2020-10-21
Inventor： Mohamed El-Nozahi , Amr G. Elgamal
Abstract: Apparatus and methods for compensating supply sensitive circuits for supply voltage variation are provided. In certain embodiments, an electronic system includes a power supply that outputs a supply voltage having a nominal voltage level, a supply conductor for routing the supply voltage, and a group of integrated circuits (ICs) that each receive the supply voltage from the supply conductor. Each IC includes a supply sensing circuit that generates a sense signal based on a local voltage level of the supply voltage at the IC, a bias control circuit that adjusts a bias signal based on the sense signal to account for a difference between the nominal voltage level and the local voltage level of the supply voltage, and a signal processing circuit biased by the bias signal.
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公开(公告)号：US11293891B2
公开(公告)日：2022-04-05
申请号：US16143897
申请日：2018-09-27
Inventor： Michael Coln , Mark Daniel de Leon Alea
IPC: G01N27/327 , G01N33/487 , G01N27/00 , H03K3/03 , G01N27/414 , G01N33/497 , H03K3/0231 , H03M1/60 , B82Y15/00
Abstract: Embodiments of the present disclosure relate to various methods and example systems for carrying out analog-to-digital conversion of data acquired by arrays of nanogap sensors. The nanogap sensors described herein may operate as molecular sensors to help identify chemical species through electrical measurements using at least a pair of electrodes separated by a nanogap. In general, the methods and systems proposed herein rely on digitizing the signal as the signal is being integrated, and then integrating the digitized results. With such methods, the higher sample rate used in the digitizer reduces the charge per quantization and, therefore, the size of sampling capacitors used. Consequently, sampling capacitors may be made factors of magnitude smaller, requiring less valuable space on a chip compared to sampling capacitors used in conventional nanogap sensor arrays.
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公开(公告)号：US20220099714A1
公开(公告)日：2022-03-31
申请号：US17483106
申请日：2021-09-23
Inventor： Shaoli Ye , Gina M Kelso , David J. Lath , Wlliam Michael James Holland , John Jude O' Donnell
IPC: G01R19/165 , G01R31/396 , G01R31/367 , G01R19/22
Abstract: The disclosure relates to accurately determining a DC energy signal, such as a DC current or DC voltage, which may be particularly useful when controlling a formation/testing current of a battery cell during formation and/or testing. In the battery formation/testing context, a current sensor is used to measure the current of the battery cell, which is used as a feedback signal for controlling the current to achieve a target current. The transfer function of the current sensor is used to improve the accuracy of the current measurement. Because the transfer function can be regularly determined during formation/testing, a lower-cost current sensor with relatively poor temperature coefficient may be used. Any change in the gain of the current sensor may be detected by the transfer function determination and corrected for. Therefore, high current control accuracy may be achieved at lower cost.
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