-
公开(公告)号：US11968073B2
公开(公告)日：2024-04-23
申请号：US17597261
申请日：2020-06-17
Applicant: The Regents of the University of California
Inventor： Hossein Mohammadnezhad , Huan Wang , Payam Heydari
IPC: H04L27/36
CPC classification number: H04L27/361
Abstract: Aspects of quadrature phase shift keying for quadrature amplitude modulation are described. In some examples, quadrature phase shift keying signals are generated using quadrature phase shift keying modulators. The quadrature phase shift keying signals are combined in a combiner circuit to generate a quadrature amplitude modulation signal for wireless transmission.
-
公开(公告)号：US11588240B2
公开(公告)日：2023-02-21
申请号：US17496626
申请日：2021-10-07
Applicant: The Regents of the University of California
Inventor： Hamidreza Afzal , Omeed Momeni , Rouzbeh Kananizadeh , Razieh Abedi , Payam Heydari
Abstract: Techniques, systems and architectures for generating desired phase shifts in a phased array to control the directions of radiation in a wide range of angles are disclosed. Particularly, phased array architectures based on novel PLL-coupled phase shifting techniques for implementation in millimeter-wave (mm-wave) and sub-terahertz (sub-THz) operations range are described. In one aspect, a phased array including an array of unit cells is disclosed. In some embodiments, each unit cell in the array of unit cells includes a dual-nested PLL that is configured to effectuate phase locking and frequency locking to a reference signal from an adjacent unit cell. Moreover, each PLL includes control circuitry that can generate a wide range of phase shifts between adjacent unit cells to facilitate phased-array operations. Note that using the dual-nested PLL to generate a desired phase shift between adjacent radiating elements eliminates the use of conventional lossy phase shifters in the phased array.
-
3.发明申请公开(公告)号：US20190231204A1
公开(公告)日：2019-08-01
申请号：US16376831
申请日：2019-04-05
Inventor： Payam Heydari , Zoran Nenadic , An Do , Charles Liu
CPC classification number: A61B5/04001 , A61B5/04004 , A61B5/0476 , A61B5/4851 , A61B5/6868 , A61B5/7225 , A61F2/72 , A61H2201/165 , A61N1/0534 , G06F3/00 , G06F3/01 , G06F3/015
Abstract: A fully-implantable brain-computer interface cyber-physical system capable of acquiring and analyzing electrocorticogram (“ECoG”) signals, recorded directly from the subdural space of the brain, to enable direct brain control of a prosthetic (e.g., a robotic gait exoskeleton or a functional electrical stimulation (“FES”) system) is disclosed. The present system comprises a plurality of electrodes, for acquiring the ECoG signals, and a digital signal processor (“DSP”) for deriving a plurality of real-time commands from the ECoG signals. These real-time commands may then be wirelessly transmitted to the prosthetic for execution. Further, to avoid wireless data transmission of the ECoG signals from the plurality of electrodes to the DSP, which would expose the brain, skull, and scalp tissue to potentially harmful radio frequencies, a subcutaneous tunneling cable operatively couples the plurality of electrodes and the DSP.
-
公开(公告)号：US10243523B2
公开(公告)日：2019-03-26
申请号：US15725212
申请日：2017-10-04
Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
Inventor： Payam Heydari , Seyed Mohammad Hossein Mohammadnezhad , Alireza Karimi Bidhendi , Michael M. Green , David Howard , Edward Preisler
Abstract: Design of ultra broadband transimpedance amplifiers (TIA) for optical fiber communications is disclosed. In one embodiment, a TIA comprises a gm-boosted dual-feedback common-base stage, a level shifter and an RC-degenerated common-emitter stage, and a first emitter-follower stage, wherein the first emitter follower stage is inductively degenerated. An output of the TIA is buffered using a second emitter-follower stage.
-
公开(公告)号：US20180102749A1
公开(公告)日：2018-04-12
申请号：US15725212
申请日：2017-10-04
Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
Inventor： Payam Heydari , Seyed Mohammad Hossein Mohammadnezhad , Alireza Karimi Bidhendi , Michael M. Green , David Howard , Edward Preisler
CPC classification number: H03F3/085 , H03F1/347 , H03F1/42 , H03F1/483 , H03F3/08 , H03F3/3432 , H03F3/50 , H03F2200/135 , H03F2200/405 , H03F2203/5036
Abstract: Design of ultra broadband transimpedance amplifiers (TIA) for optical fiber communications is disclosed. In one embodiment, a TIA comprises a gm-boosted dual-feedback common-base stage, a level shifter and an RC-degenerated common-emitter stage, and a first emitter-follower stage, wherein the first emitter follower stage is inductively degenerated. An output of the TIA is buffered using a second emitter-follower stage.
-
Patent Agency Ranking
公开(公告)号：US10601140B2
公开(公告)日：2020-03-24
申请号：US15875526
申请日：2018-01-19
Inventor： Chanwook Baik , Payam Heydari , Peyman Nazari
Abstract: An electromagnetic wave radiator may include: a first metal layer; a plurality of metal side walls vertically protruding along an edge of the first metal layer; and a second metal layer suspended over the first metal layer. The second metal layer includes a plurality of ports radially extending from edges of the second metal layer and a plurality of slots penetrating the second metal layer in a radial direction.
-
7.发明申请公开(公告)号：US20130322469A1
公开(公告)日：2013-12-05
申请号：US13686803
申请日：2012-11-27
Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
Inventor： Fred Tzeng , Payam Heydari
IPC: H04J13/10
CPC classification number: H04J13/10 , H04B1/707 , H04B2201/70707
Abstract: A code-division multiplexing (CDM) system utilized in multi-channel (MC) front-end integrated circuits to significantly reduce the power consumption of such systems. The CDM system extends data compression advantages to uncorrelated and weakly correlated MC signals through the introduction of a new Multi-Channel Signal Binning and Multiplexing (MCSBM) method and architecture. The method achieves significant reductions in power consumption in comparison to a conventional time-division multiplexing quantizer, while adding only a modest amount of overhead and complexity. Systems and methods permit architects to fabricate MC integrated circuits with ultra low power consumption and small chip area. Another embodiment relates to the system's compressor organizing samples of the input signal in such a way that the downstream analog-to-digital converter quantizes the higher variance samples with a higher resolution compared to the resolution it uses to quantize other samples with lower variance.
Abstract translation: 在多通道（MC）前端集成电路中使用的码分多路复用（CDM）系统可显着降低这种系统的功耗。 CDM系统通过引入新的多信道信号分组和复用（MCSBM）方法和架构，将数据压缩优势扩展到不相关和弱相关的MC信号。 与传统的时分复用量化器相比，该方法实现了功耗的显着降低，同时仅增加了适量的开销和复杂度。 系统和方法允许建筑师制造具有超低功耗和小芯片面积的MC集成电路。 另一实施例涉及系统的压缩机组合输入信号的样本，使得下游模数转换器与其用于量化具有较低方差的其他样本的分辨率相比，以更高的分辨率量化较高方差样本。
-
公开(公告)号：US11817625B2
公开(公告)日：2023-11-14
申请号：US17708963
申请日：2022-03-30
Inventor： Chanwook Baik , Payam Heydari , Peyman Nazari
CPC classification number: H01Q13/18 , H01Q3/34 , H01Q3/443 , H01Q13/12 , H01Q21/205 , H03F3/19 , H03F3/60 , H01P5/00 , H03F2200/222 , H03F2200/318 , H03F2200/387 , H03F2200/451
Abstract: An electromagnetic wave radiator may include: a first metal layer; a plurality of metal side walls vertically protruding along an edge of the first metal layer; and a second metal layer suspended over the first metal layer. The second metal layer includes a plurality of ports radially extending from edges of the second metal layer and a plurality of slots penetrating the second metal layer in a radial direction.
-
公开(公告)号：US20220109236A1
公开(公告)日：2022-04-07
申请号：US17496626
申请日：2021-10-07
Applicant: The Regents of the University of California
Inventor： Hamidreza Afzal , Omeed Momeni , Rouzbeh Kananizadeh , Razieh Abedi , Payam Heydari
Abstract: Techniques, systems and architectures for generating desired phase shifts in a phased array to control the directions of radiation in a wide range of angles are disclosed. Particularly, phased array architectures based on novel PLL-coupled phase shifting techniques for implementation in millimeter-wave (mm-wave) and sub-terahertz (sub-THz) operations range are described. In one aspect, a phased array including an array of unit cells is disclosed. In some embodiments, each unit cell in the array of unit cells includes a dual-nested PLL that is configured to effectuate phase locking and frequency locking to a reference signal from an adjacent unit cell. Moreover, each PLL includes control circuitry that can generate a wide range of phase shifts between adjacent unit cells to facilitate phased-array operations. Note that using the dual-nested PLL to generate a desired phase shift between adjacent radiating elements eliminates the use of conventional lossy phase shifters in the phased array.
-
公开(公告)号：US20210218614A1
公开(公告)日：2021-07-15
申请号：US17162200
申请日：2021-01-29
Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
Inventor： Seyed Mohammad Hossein Mohammadnezhad , Huan Wang , Payam Heydari
Abstract: Methods, systems, and apparatuses provide a transmitter architecture that directly generates 4N-QAM constellation using a raw bit stream as input and that does not require a digital-to-analog converter (DAC) in the signal path.
-
-
-
-
-
-
-
-
-
Search Results
19
records
(took 0.026 seconds)
