University of California

Abstract This work presents ReFIND, an SoC integrating together 16 resolution-reconfigurable AFEs, a feature extractor, and a classifier. The VCO ADC architecture trades power for resolution by scaling the integration ti

Abstract GaN has played an important role in both RF and power devices. GaN made the rapid development and deployment of 5G base stations possible with use of its Ga-polar face. Meanwhile, the N-polar face of GaN has sho

Abstract This work presents an O-band coherent direct-drive optical transmitter (OTX) in 45nm CMOS-SOI using a compact 0.4mm monolithically integrated forward-biased PIN-MZM. A multistage linear driver with shunt peaking

Abstract This paper presents a fully integrated GMR biosensor chip for point-of-care in vitro diagnostics featuring on-chip sensors, excitation coils, and a digital back-end. The system achieves 120nTrms noise, 0.38ppm s

Abstract We present a 65nm digital Ising chip with an advanced column-bipartite topology, featuring densely connected spins with a degree of 56 and 8b coefficients for mapping and solving computationally intensive combin

Abstract We present a 55nm mixed-signal K-SAT solver with parallel-variable update algorithm for improved convergence and a compute-in-memory fabric that maps arbitrary-order K-SAT instances without preprocessing. It sol

The 5G new-radio (NR) frequency-range-2 (FR2) for cellular communications supports a maximum channel bandwidth of 400MHz [1] and utilizes orthogonal frequency-division multiplexing (OFDM) to support high data rates with

Millimeter-wave (mm-wave) frequencies are widely used in applications that require high throughput and/or small sizes thanks to the wide available bandwidth and small achievable antenna-array sizes. Applications such as

voltage and current requirements, such as delivering over 1A at voltages below 1V. This drives the need for efficient point-of-load DC-DC converter topologies capable of large step-down conversion with high current densi

electrostatic and piezoelectric actuators are crucial in small-scale electromechanical applications, but they significantly impact the overall system weight, especially in microrobotics [1,2,3]. These systems operate at

University of California, San Francisco, CA 1 ~60% of cancer patients undergo surgery to remove a primary tumor, and precise removal of all cancer cells is vital for optimal outcomes [1]. Microscopic clusters of cancer c

Near fields, unencumbered by the restrictions imposed by diffraction limits, can be leveraged in high-resolution sub-wavelength imaging systems [1]. Utilizing the near-fields generated by arrays of mmWave and THz resonat

Optimization is vital to Engineering, Artificial Intelligence, and to many areas of Science. Mathematically, we usually employ steepest-descent, or other digital algorithms. For example, Deep Learning is an optimization

CEA-Léti, Grenoble, France 1 2 Piezoelectric resonators (PRs) have recently emerged as an attractive substitute for inductors to process energy in DC-DC converters, due to their low-volume planar formfactors, superior vo

Boolean satisfiability (SAT), a non-deterministic polynomial (NP)-complete problem, has gained increasing attention with applications in artificial intelligence, machine learning, electronic design automation, and VLSI tes

Ising machines, hardware accelerators based on the Ising model, have recently gained interest as alternative computers for solving combinatorial optimization problems (COPs) in various industrial fields with practical app

Sejong University, Seoul, Korea *Equally Credited Authors (ECAs) independently interact with their neighboring spins in the corresponding position from their group while the replica equalization switches are off. After t

*Equally Credited Authors (ECAs) The Ising machine is a hardware accelerator that finds solutions to combinatorial optimization problems (COPs) using the natural convergence behavior of the Ising model, which comprises a

There has been an increasing demand for ultra-low power IoT devices in recent years. These devices often have low activity rates and most of the time are in standby mode, resulting in a high leakage energy consumption. T

The ongoing demand for smaller form factors and faster charging times of mobile products continue to drive the need for efficient, high-density power delivery (PD) for charging with a wide input voltage (VIN) range of 5V

Efficient THz generation in silicon technologies has been of great interest over the recent years, as it enables an integrated low-cost solution for sensing, radar, communication, and spectroscopy [1]. Due to the limited

The rise of the internet-of-things and distributed sensor nodes with machine-learning and edge processing are driving the need for low-power, high-precision ADCs. These highly digital systems are best implemented in adva

*Equally-Credited Authors (ECAs) Many envisioned IoT applications are not realizable today due to the mW-level power burden of wireless communication circuits for the most popular consumer standards: WiFi and BLE. To hel

Beyond-10GHz frequency synthesizers are ubiquitous building blocks for today’s evergrowing wireless and wireline communication systems. To meet the stringent requirements on data-rate and modulation schemes, the phase no

PAM-4 wireline transmitters operating at 224Gb/s can employ a 56GHz PLL for multiplexing. Such an environment poses several constraints on the design. First, the PLL rms jitter must be no more than a few percent of the s

Programmable receivers have drawn a lot of attention in recent years, especially those exploiting periodically time-varying (PTV) circuits. N-path filters and mixer-first receivers [1$3] achieve sharp filtering and good

Next-generation wearable devices will enable clinical-grade, continuous ExG (ECG, EEG, EMG, etc.) biopotential monitoring, providing medical professionals with valuable longitudinal data outside of hospital settings. The

Motion and stimulation artifacts encountered in wearable sensors present difficult dynamic range (DR) and linearity challenges: AFEs need to be able to resolve μV-level signals in the presence of artifacts up to 100s of

High-resolution and fast imaging/sensing at THz requires highly directive steerable beams for scanning the object. A coherent array of coupled sources could improve the radiated power but requires mechanical and slow sca

Inductive DC-DC converters are fundamentally limited by the trade-off between conduction losses and switching losses. Miniaturized converters used in applications such as mobile devices suffer badly from this trade off,

high-capacity wireless access. A base-station array of M antennas simultaneously steers K independent beams, which enables spatial multiplexing and channel bandwidth reuse across multiple users. It has been shown that fo

The power consumption of wireline transceivers has become increasingly critical as higher data rates and a larger numbers of lanes per chip are sought [1-6]. While attractive for lossy channels, PAM-4 signaling has mostl

Continuous monitoring of regional tissue oxygenation (RTO) can provide therapeutic guidance for critical care patients. Current technologies for RTO assessment require tethered, wired connections or batteries, creating p

San Diego, CA 1 2 Nearly all IoT devices require wireless connectivity, and to keep costs down and deployment opportunities up, communication should ideally occur with widely deployed commodity hardware such as WiFi. How

The power density and efficiency of power-management integrated circuits (PMICs) is playing an increasingly important role in the miniaturization of modern computing platforms. Small inductors can be used to help miniatur

Zhejiang University, Hangzhou, China 1 2 The increase of carrier frequency enables the utilization of the abundant highfrequency resource to meet the ceaseless demand for high data-rates. With respect to the transmitter,

Wake-up receivers (WuRXs) offer an attractive low-power means to synchronize low-average-throughput wireless devices without requiring energy-expensive periodic synchronization routines between primary radios. To achieve

The continuous improvement in ultra-low-power/voltage (ULP/V) circuits paves the way for new near-battery-free IoE applications. In this work, we propose an LC oscillator that can significantly improve phase-noise (PN) pe

An always-ON, stable, 32kHz crystal oscillator (XO) provides key time-keeping, synchronization, and sleep-timer functions in most electronic systems. Ultra-low power (ULP) consumption of the XO is critical in highly duty

Emerging wearable devices such as wireless headphones, smart glasses, and medical monitors require increasingly high-throughput wireless communications at ultra-low-power. Since far-field RF has significant path loss aroun

There is need for a low-power, compact, means of generating multiple, low-jitter, spectrally pure, clock signals at different frequencies using a single reference oscillator, both in wireline and wireless applications, o

Magnetic biosensors have drawn significant research interest as a means to replace large optical instrumentation commonly found in centralized diagnostic laboratories. Magnetic biosensing is attractive since biological sa

University of California, Santa Barbara, Santa Barbara, CA 1 2 Gigabit-per-second millimeter-wave (mm-wave) access and backhaul networks at 28GHz demand high-order QAM, OFDM, and/or carrier-aggregated waveforms that forc

would benefit greatly from batteryless compact radios that require no external components. Such a radio could be used for future RFID, wearable/implantable devices, and counter-counterfeit electronics. Previous demonstra

Multi-user multiple-input multiple-output (MIMO) systems are promising enablers for high-capacity wireless access in next-generation mobile networks. Leveraging antenna arrays at the access point, narrow beams can be ste

Accurate current measurement is crucial in many biosensing applications, such as the detection of neurotransmitters [1] and the monitoring of intercellular molecular dynamics. This need has become even more critical rece

Modern DVFS-enabled SoCs require nimble supply regulators that rapidly respond to abrupt load changes and offer fine resolution (e.g., 12.5mV in [1], 10mV in

Inphi, Santa Clara, CA 1 2 Recent advancements in medical neural science and brain research have enabled the potential of uninterrupted simultaneous recording of thousands of neurons. To minimize the risk of infection to

Closed-loop neuromodulation with simultaneous stimulation and sensing is desired to advance deep brain stimulation (DBS) therapies. However, stimulation generates large artifacts (~100mV) at the recording sites that satu

Present implementations of MEMS gyroscopes measure rate indirectly by first converting it to a displacement [1,2]. In this case, the scale factor is a complex function of the transducer and readout circuits. Changes of a