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公开(公告)号：US20210344306A1
公开(公告)日：2021-11-04
申请号：US17243721
申请日：2021-04-29
Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN
Inventor： Rohit ROTHE , Sechang OH , Kyojin CHOO , Seok Hyeon JEONG , Dennis SYLVESTER , David T. BLAAUW
Abstract: An amplifier is presented with a sample and average common mode feedback resistor. The amplifier circuit includes a feedback capacitor and a feedback resistor in parallel with the feedback capacitor, where the feedback capacitor and the feedback resistor form part of the negative feedback path for the amplifier. Of note, the feedback resistor is comprised of a low pass filter in series with a switched capacitor resistor, such that the low pass filter is electrically coupled to the output of the amplifier circuit and the switched capacitor resistor is electrically coupled to the inverting input of the amplifier circuit. The amplifier circuit further includes a control circuit interfaced with switches of the switched capacitor resistor. The high pass corner of the switched capacitor resistor is preferably lower than corner of the low pass filter.
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公开(公告)号：US20160291129A1
公开(公告)日：2016-10-06
申请号：US14617457
申请日：2015-02-09
Inventor： Michael B. HENRY , Dennis SYLVESTER , Bharan GIRIDHAR , David T. BLAAUW , Laura FREYMAN , David Alan FICK
Abstract: A matched filter is provided for signal processing applications such as GNSS and RADAR. The filter includes a plurality of correlator cells configured to receive a digital signal and are arranged so that values of the digital signal can be shifted amongst the plurality of correlator cells. Each correlator cell includes a correlator circuit, a data source and a current source. The correlator circuit is configured to receive a value from the digital signal and operates to correlate the value with a value of the known pattern stored in the data store. The current source is interfaced with the correlator circuit and selectively sources current based on the correlation operation performed by the correlator circuit; and an output circuit is coupled to each of the plurality of correlator cell and operates to generate an output which is correlated to current that is being source collectively by the current sources.
Abstract translation: 为GNSS和RADAR等信号处理应用提供了匹配滤波器。 滤波器包括多个相关器单元，其被配置为接收数字信号并且被布置成使得可以在多个相关器单元之间移位数字信号的值。 每个相关器单元包括相关器电路，数据源和电流源。 相关器电路被配置为从数字信号接收值并且操作以将该值与存储在数据存储器中的已知模式的值相关联。 电流源与相关器电路接口，并且基于相关器电路执行的相关操作选择性地馈送电流; 并且输出电路耦合到所述多个相关器单元中的每一个并且操作以产生与由所述当前源集体来源的电流相关联的输出。
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公开(公告)号：US20180098696A1
公开(公告)日：2018-04-12
申请号：US15840517
申请日：2017-12-13
Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN
Inventor： David T. BLAAUW , Zhiyoong FOO , Gyouho KIM , Qing DONG , Dennis SYLVESTER
CPC classification number: A61B3/16 , A61B3/0016 , A61B2560/0209 , A61B2560/0219 , A61B2560/045 , A61B2562/0247 , A61B2562/028 , A61B2562/164 , A61B2562/166 , G05F3/262
Abstract: An intraocular pressure sensor is presented that achieve very low power consumption. The intraocular pressure sensor takes the form of an implantable assembly configured to be implanted in an eye of a subject. Specifically, the implantable assembly is comprised of a capsular tension ring attached to a flexible printed circuit board. The flexible printed circuit board includes a cutout that is sized to encircle the pupil of the eye and is C shaped. One or more electrical components are also mounted onto the flexible printed circuit board. One such component is a voltage reference generator that is implemented by a circuit which provides inherently low process variation and low power consumption.
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公开(公告)号：US20170357285A1
公开(公告)日：2017-12-14
申请号：US15622202
申请日：2017-06-14
Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN
Inventor： Qing DONG , David T. BLAAUW , Dennis SYLVESTER
IPC: G05F3/26
CPC classification number: G05F3/262
Abstract: A sub-nW voltage reference is presented that provides inherently low process variation and enables trim-free operation for low-dropout regulators and other applications in nW microsystems. Sixty chips from three different wafers in 180 nm CMOS are measured, showing an untrimmed within-wafer σ/μ of 0.26% and wafer-to-wafer σ/μ of 1.9%. Measurement results also show a temperature coefficient of 48-124 ppm/° C. from −40° C. to 85° C. Outputting a 0.986V reference voltage, the reference operates down to 1.2V and consumes 114 pW at 25° C.
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公开(公告)号：US20230244746A1
公开(公告)日：2023-08-03
申请号：US17674470
申请日：2022-02-17
Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN
Inventor： Dennis SYLVESTER , David BLAAUW , Yu CHEN , Pierre ABILLAMA , Hun-Seok KIM
CPC classification number: G06F17/145 , G06F17/16 , G06N3/08
Abstract: A computer-implemented method is presented for performing a computation with a neural network. The method includes: receiving a first input patch of data; applying a Walsh-Hadamard transform to the input patch to yield a transformed input patch in a transformed domain; computing an element-wise product of the transformed input patch and a kernel of the neural network; applying an inverse Walsh-Hadamard transform to the element-wise product to yield an intermediate matrix; and creating a first output patch from the intermediate matrix, where the size of the first output patch is smaller than the intermediate matrix.
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Patent Agency Ranking
公开(公告)号：US20210244280A1
公开(公告)日：2021-08-12
申请号：US17173976
申请日：2021-02-11
Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN
Inventor： David T. BLAAUW , Jamie PHILLIPS , Cynthia Anne CHESTEK , Taekwang JANG , Hun-Seok KIM , Dennis SYLVESTER , Jongyup LIM , Eunseong MOON , Michael BARROW , Samuel NASON , Julianna RICHIE , Paras PATEL
IPC: A61B5/00 , H04B10/80 , H04B10/114 , A61B5/37 , A61B5/384
Abstract: A mote includes an optical receiver that wirelessly receives a power and data signal in form of NIR light energy within a patient and converts the NIR light energy to an electrical signal having a supply voltage. A control module supplies the supply voltage to power devices of the mote. A clock generation circuit locks onto a target clock frequency based on the power and data signal and generates clock signals. A data recovery circuit sets parameters of one of the devices based on the power and data signal and a first clock signal. An amplifier amplifies a neuron signal detected via an electrode inserted in tissue of the patient. A chip identifier module, based on a second clock signal, generates a recorded data signal based on a mote chip identifier and the neuron signal. A driver transmits the recorded data signal via a LED or a RF transmitter.
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公开(公告)号：US20170170722A1
公开(公告)日：2017-06-15
申请号：US15116072
申请日：2015-02-05
Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN
Inventor： Wanyeong JUNG , Sechang OH , Suyoung BANG , Yoonmyung LEE , Dennis SYLVESTER , David T. BLAAUW
IPC: H02M3/07 , H03K19/0175 , H02M1/36 , H03K3/03
CPC classification number: H02M3/07 , H02M1/36 , H03K3/0315 , H03K19/017509
Abstract: A self-oscillating DC-DC converter structure is proposed in which an oscillator is completely internalized within the switched-capacitor network. This eliminates power overhead of clock generation and level shifting and enables higher efficiency at lower power levels. Voltage doublers are cascaded to form a complete energy harvester with a wide load range from 5 nW to 5 μW and self-starting operation down to 140 mV. Because each doubler is self-oscillating, the frequency of each stage can be independently modulated, thereby optimizing the overall conversion efficiency.
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公开(公告)号：US20240028900A1
公开(公告)日：2024-01-25
申请号：US17872715
申请日：2022-07-25
Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN
Inventor： Hun-Seok KIM , David BLAAUW , Dennis SYLVESTER , Yu CHEN , Pierre ABILLAMA , Hyochan AN
CPC classification number: G06N3/082 , G06F17/16 , G06F7/5443
Abstract: Recent advances in model pruning have enabled sparsity-aware deep neural network accelerators that improve the energy efficiency and performance of inference tasks. SONA, a novel transform-domain neural network accelerator is introduced in which convolution operations are replaced by element-wise multiplications and weights are orthogonally structured to be sparse. SONA employs an output stationary dataflow coupled with an energy-efficient memory organization to reduce the overhead of sparse-orthogonal transform-domain kernels that are concurrently processed while maintaining full multiply-and-accumulate (MAC) array utilization without any conflicts. Weights in SONA are non-uniformly quantized with bit-sparse canonical-signed-digit (BS-CSD) representations to reduce multiplications to simpler additions.
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9.发明公开公开(公告)号：US20230146711A1
公开(公告)日：2023-05-11
申请号：US17983463
申请日：2022-11-09
Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN
Inventor： Yimai PENG , David BLAAUW , Dennis SYLVESTER , David Kyojin CHOO
IPC: G01P15/125 , H02M3/07
CPC classification number: G01P15/125 , H02M3/07 , G01P2015/0862
Abstract: A motion sensing system uses high-voltage biasing to achieve high resolution with ultra-low power. The motion sensing system consists of a motion sensor, a readout circuit, and a high-voltage bias circuit to generate the optimized bias voltage for the motion sensor. By using the high-voltage bias, the signal from the motion sensor is raised above the readout circuit's noise floor, eliminating the power-hungry amplifier and signal-chopping used in conventional motion sensing systems. The bias circuit, while producing the programmable bias voltages for the motion sensor, also compensates for the process mismatch raised by the high voltage biases.
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公开(公告)号：US20200116817A1
公开(公告)日：2020-04-16
申请号：US16654547
申请日：2019-10-16
Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN
Inventor： Li-Xuan CHUO , Hun-Seok KIM , David T. BLAAUW , Dennis SYLVESTER , Mingyu YANG
Abstract: A system is presented for non-line-of-sight localization between RF enabled devices. A transmitting node is configured to transmit an RF ranging signal at a first carrier frequency, where the RF ranging signal is modulated with a symbol. The reflecting node is configured to receive the RF ranging signal and further operates to convert the RF ranging signal to a second carrier frequency and retransmit the converted ranging signal while simultaneously receiving the RF ranging signal. The localizing node is configured to receive the converted ranging signal from the reflecting node. The localizing node operates to identify, in frequency domain, the symbol in the converted ranging signal and compute a distance between the reflecting node and the localizing node based in part on the identified symbol in the converted ranging signal. The transmitting node and the localizing node may be on the same or different devices.
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