A5067858723- Quantum and electron transport phenomena
- Advancements in Semiconductor Devices and Circuit Design
- Quantum Computing Algorithms and Architecture
- Semiconductor materials and devices
- Quantum Information and Cryptography
- Radio Frequency Integrated Circuit Design
- Interconnection Networks and Systems
- 3D IC and TSV technologies
- Neuroscience and Neural Engineering
- CCD and CMOS Imaging Sensors
- Embedded Systems Design Techniques
- Thin-Film Transistor Technologies
- Ultrasound Imaging and Elastography
- Advanced DC-DC Converters
- Physics of Superconductivity and Magnetism
- Semiconductor Quantum Structures and Devices
- Silicon Carbide Semiconductor Technologies
- Neural dynamics and brain function
- Parallel Computing and Optimization Techniques
- Ultrasound and Hyperthermia Applications
- EEG and Brain-Computer Interfaces
- Optical Coherence Tomography Applications
- Low-power high-performance VLSI design
- Advanced Fluorescence Microscopy Techniques
- Photoreceptor and optogenetics research
IBM Research - Thomas J. Watson Research Center
2020-2024
IBM (United States)
2022-2024
Columbia University
2015-2024
BioElectronics (United States)
2019-2021
Stanford University
2015
Sensing the force digitally Our skin provides us with a flexible waterproof barrier, but it also contains sensor array that feels world around us. This feedback and helps to avoid hot object or increase strength of our grip on an may be slipping away. Tee et al. describe approach simulate mechanoreceptors human skin, using pressure-sensitive foils printed ring oscillators (see Perspective by Anikeeva Koppes). The successfully converted pressure into digital response in range comparable found...
Error-corrected quantum computing is expected to require at least 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">5</sup> xmlns:xlink="http://www.w3.org/1999/xlink">6</sup> physical qubits. Superconducting transmons, which are promising qubit candidates for scaled systems, typically individually tailored RF pulses in the 4-to-6 GHz range manipulate their states, so scaling qubits presents an enormous challenge. Providing a control line every...
Qubit control electronics composed of CMOS circuits are critical interest for next-generation quantum computing systems. A CMOS-based application-specific integrated circuit (ASIC) fabricated in 14-nm fin field-effect transistor (FinFET) technology was used to generate and sequence qubit wave forms demonstrate a two-qubit cross-resonance gate between fixed-frequency transmons. The controller thermally anchored the <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"...
Emerging non-imaging ultrasound applications, such as ultrasonic wireless power delivery to implantable devices and neuromodulation, require wearable form factors, millisecond-range pulse durations focal spot diameters approaching 100 μm with electronic control of its three-dimensional location. None these are compatible typical handheld linear array imaging probes. In this work, we present a 4 mm × 5 2D phased transmitter integrated piezoelectric transducers on complementary...
A scalable, non-multiplexed cryogenic 14-nm FinFET quantum bit (qubit) state controller (QSC) for use in the semi-autonomous control of superconducting transmon qubits is reported. The QSC includes an augmented general-purpose digital processor that supports waveform generation and phase rotation operations combined with a low-power current-mode single sideband upconversion <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math...
Abstract Minimally invasive, high-bandwidth brain-computer-interface (BCI) devices can revolutionize human applications. With orders-of-magnitude improvements in volumetric efficiency over other BCI technologies, we developed a 50-μm-thick, mechanically flexible micro-electrocorticography (μECoG) BCI, integrating 256×256 electrodes, signal processing, data telemetry, and wireless powering on single complementary metal-oxide-semiconductor (CMOS) substrate containing 65,536 recording 16,384...
Emerging technologies provide SoCs with fine-grained DVFS capabilities both in space (number of domains) and time (transients the order tens nanoseconds). Analyzing these systems requires cycle-accurate accounting rapidly-changing dynamics complex interactions among accelerators, interconnect, memory, OS. We present an FPGA-based infrastructure that facilitates such analyses for high-performance embedded systems. show how our can be used to first generate loosely-coupled then perform...
This paper presents a 40-MHz hybrid CMOS/GaN integrated multiphase dc-dc switched-inductor buck converter with maximum 20-V input voltage. The half-bridge switches are realized using lateral AlGaN/GaN HEMTs, while the drivers and other circuitry implemented in standard 180-nm CMOS. interface between CMOS GaN dice is achieved through face-to-face bonding, reducing inductive parasitics for connection to less than 15 pH. A capacitively coupled level shifter provides gate drive high-side switch...
This paper presents an agile-designed domain-specific SoC in 12nm CMOS for the emerging application domain of swarm-based perception. Featuring a heterogeneous tile-based architecture, was designed with agile methodology using open-source processors and accelerators, interconnected by multi-plane NoC. A reconfigurable memory hierarchy CS-GALS clocking scheme allow to run at variety performance/power operating points. Compared high-end FPGA, presented achieves 7 × performance 62× efficiency...
A 5.9-8.4GHz LNA intended for use at cryogenic temperatures was implemented in a 14nm FinFET CMOS technology. At 4.1 K, peak gain of 13.4dB is measured 7.1GHz, with 3dB bandwidth 2.5GHz and power consumption 2.1mW. Also, 4.1K, noise figure from 6 to 8GHz 0.53-0.57dB the temperature 37.6-41K; this set measurements 2.57mW.
This paper presents a three-dimensional (3D) fully integrated high-speed multiphase voltage regulator. A complete switched-inductor regulator is with four-plane NoC in two-high chip stack combining magnetics, through-silicon vias (TSVs), and 45-nm SOI CMOS devices. Quasi-V <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> hysteretic control implemented over eight injection-locked fixed-frequency phases to achieve fast response,...
Abstract Qubit control electronics composed of CMOS circuits are critical interest for next generation quantum computing systems. A CMOS–based application specific integrated circuit (ASIC) fabricated in 14nm FinFET technology was used to generate and sequence qubit waveforms demonstrate a two–qubit cross resonance gate between fixed frequency transmons. The controller thermally anchored the T = 4K stage dilution refrigerator measured power 23 mW per under active control. chip generated...
We report a new approach to building an ASIC-style superconducting SFQ logic cell library for the 8-layer 0.35 μm Niobium SFQ5ee process from MIT LL. The developed layout template supports XY routing with Passive Transmission Lines (PTLs) and targets conventional Place-and-Route assembly design of VLSI Random Logic Macros (RLMs). designed gates are based on clockless Dynamic (DSFQ) which allows one directly implement deep combinational clouds. full communicate only via PTL plane, while...
Optical functional neural imaging has revolutionized neuroscience with optical reporters that enable single-cell-resolved monitoring of neuronal activity in vivo. State-of-the-art microscopy methods, however, are fundamentally limited depth by absorption and scattering tissue even the use most sophisticated two-photon techniques [1]. To overcome this problem, we develop a lens-less, optical-filter-less, shank-based image sensor array can be inserted into brain, allowing cellular-resolution...
While the mechanisms are not yet completely understood, ultrasound-based neuromodulation has been emerging as a noninvasive modality for interfacing to both central and peripheral nervous systems, due its high penetration depth good spatial resolution. Commercially available ultrasound transducers applications typically single-element focused with bulky form factor off-the-shelf electronics drive. Changing focal position requires mechanical movement of transducer itself. High-density phased...
This paper presents a three-dimensional (3D) fully integrated high-speed multiphase voltage regulator. A complete switched-inductor regulator is with four-plane NoC in two-high chip stack combining magnetics, through-silicon vias (TSVs), and 45-nm SOI CMOS devices. Quasi-V <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> hysteretic control implemented over eight injection-locked fixed-frequency phases to achieve fast response,...
A fully functional compile-able 4.1Kb 6T SRAM macro in 14nm FinFET technology targeting low-voltage cryogenic operation with a configurable multi-supply boosting capability VCSmin of 0.23V (room temperature) and 0.31V (6K) is demonstrated.
Today's quantum computing systems rely on commercial electronics operating at room temperature in order to perform control and readout operations for qubits [1] –[6]. The operate cryogenic temperatures; the signals that support of therefore traverse multiple stages a dilution refrigerator enable interaction with computer. For many most advanced computers built date, each individual qubit demands application radiofrequency pulse is precisely calibrated frequency, amplitude, phase. Oubit...
We present a scalable methodology for the agile physical design of tile-based heterogeneous system-on-chip (SoC) architectures that simplifies reuse and integration open-source hardware components. The leverages regularity on-chip communication infrastructure, which is based on multi-plane network-on-chip (NoC), modularity socket interfaces, connect tiles to NoC. Each also provides its tile with set platform services, including independent clocking voltage control. As result, each can be...
In this paper we discuss parametric measurements of devices implemented in a commercial 14nm CMOS FinFET process taken at cryogenic temperatures. The data may be used to create cryo-CMOS device models for developing control and readout circuits qubits quantum computer. Access large number was enabled using an integrated digitally addressable analog multiplexer; the combination multiplexer set accessible through forms array. We will test structure, measurement technique, challenges, parameter...
Quantum computing is a promising new approach to that may allow the solution of certain problems are very difficult solve on classical computers. The field received its biggest impetus in 1994 when Shor [1] devised quantum algorithm for finding prime factors large numbers and showed this could greatly surpass performance known algorithms. Since time, many additional applications have been proposed, much effort has devoted developing hardware capable running
This paper presents an integrated programmable gate timing control and primary driver chip for active-clamp forward converter (ACFC) Power Block data center applications. The ACFC converts 48 V intermediate bus voltage to processor core on a motherboard with high power density. To improve the overall efficiency reduce system form factor, function level shifter are chip. These features in enable optimize of switching transistors therefore achieve optimum efficiency. silicon is fabricated 0.13...
Future generations of quantum computers are expected to operate in a paradigm where multi-qubit devices will predominantly perform circuits support error correction. Highly integrated cryogenic electronics key enabling technology the control large numbers physical qubits that be required this fault-tolerant, error-corrected regime. Here, we describe our perspectives on cryoelectronics-driven qubit architectures, and then an implementation scalable, low-power, state controller includes...