University of California

Qualcomm Atheros, San Jose, CA 1 2 The demand for ultra-high speed transceivers continues to explode, and while the data-rate for high-speed I/O standards has increased accordingly, the historically constant or even decr

Closed-loop neuromodulation with simultaneous stimulation and sensing is desired to administer therapy in patients suffering from drug-resistant neurological ailments. However, stimulation generates large artifacts at th

Clock distribution in modern SoCs consumes a significant fraction of total chip power. To reduce clock distribution power, resonant clocking schemes, where an inductive reactance is used to cancel the capacitive reactanc

Programmable receiver front-ends have been a topic of enormous interest in recent years. Both N-path filtering [1,2] and charge-domain filtering [2] achieve sharp filtering but suffer from poor matching [1] or high noise

machine learning (ML) and the internet-of-things (IoT) have resulted in a renewed interest in analog matrix-vector multiplication (MvM) accelerators [1-3]. Classification based tasks have exploited low-to-medium resoluti

Modern subthreshold SoC designs feature multiple power domains to dynamically track the maximum energy-efficiency point (0.32-0.45V [1]) in response to application demands. While analog low-drop-out (LDO) regulators have

In modern communication, wideband and high-spectral-efficiency modulation results in high peak-to-average power ratio (PAPR), up to 8 to 10dB. Well-known PA-efficiency-enhancement techniques, such as Doherty and outphasi

The loop bandwidth of conventional RF fractional-N synthesizers has been limited to about fREF/10 despite the use of methods that suppress the ΔΣ-modulator quantization noise [1-4]. The trade-off between the loop bandwid

Fully integrated implementation of mm-wave/THz radiators and phased arrays presents new potentials for applications like spectroscopy, imaging, and high data-rate communication. These applications demand sufficient radia

Modern neuromodulation requires closed-loop functionality, where neural recordings are used to adapt stimulation patterns in real time. A closed-loop system requires the neural sensing front-end to record small neural si

Jet Propulsion Laboratory, Pasadena, CA 1 2 Silicon based mm-Wave radiometers for sensing, passive imaging, and even biomedical imaging have become an emerging area with many excellent systems demonstrated up to W-band [

Reaching a power efficiency of 1mW/Gb/s has proven difficult for wireline transceivers operating at tens of gigabits per second. At 40Gb/s, recent receivers consume from 150mW [1] to 1W [2]. This paper describes a receiv

Wideband mm-Wave and terahertz (THz) applications, including high data-rate communications, high-resolution radar and spectroscopy, require wideband signal sources. Nevertheless, low quality factor of varactors and lossy

University of California, Santa Barbara, CA 1 2 High-capacity microwave systems demand high-efficiency transmit architectures that support complex waveforms with high peak-to-average-power-ratio (PAPR) modulation. The ou

Modern SoC designs employed in battery-life-constrained mobile applications feature multiple power domains to dynamically scale power-performance tradeoffs in response to application demands. Since each power domain requ

Recent developments in RF receiver design have eliminated all on-chip inductors except for that used in the local oscillator. This paper addresses this “last inductor” problem and proposes an integer-N synthesizer archit

solution for accurate assessment of body fat is presented that addresses a growing consumer interest in economical and easy-to-use solutions for monitoring personal health and fitness. Unlike the prevalent present soluti

Broadcom, Irvine, CA 1 2 As an alternative to the conventional dual-loop architecture, reference-less CDR architectures have become more popular in industry because of their simplicity and flexibility [1-5]. However, the

The growing demand for both performance and battery life in portable consumer electronics requires SoCs and power management circuits to be small, efficient, and dynamically powerful. Dynamic voltage scaling (DVS) can he

Following the rapid expansion of mobile computing in the past decade, mobile system-on-a-chip (SoC) designs have off-loaded most compute-intensive tasks to dedicated accelerators to improve energy efficiency. An increasi

Recent work on RF receivers has exploited N-path filters to address two critical issues, namely, blocker tolerance and high RF selectivity [1,2]. However, these designs face three drawbacks: (1) the low-noise amplifier (

The power consumption of broadband receivers becomes particularly critical in multi-lane applications such as the 100 Gigabit Ethernet. However, the powerspeed trade-off tends to intensify at higher rates, making it a gr

University of California, Davis, CA 1 2 The THz/sub-mm-Wave band is known to provide unique applications in spectroscopy, imaging and high-data-rate wireless communication. An accurate THz source is essential in coherent

Lithium-ion batteries are the dominant power source in mobile devices. However, while the supply voltage required for processors and SoCs has scaled down to ~1V, the voltage range of this popular battery remains ~2.9V-4.

A decision-feedback equalizer (DFE) reconstructs the post-cursor inter-symbol interference (ISI) pattern from the detected data sequence and subtracts it from the received signal before detecting the next symbol. Therefo

Serial-link transmitters are widely used in applications like optical transceivers and multi-gigabit Ethernet. At tens of Gb/s, the operating range of bit-rates is narrow; limited by the speed of the multiplexing and the

Given the continuously climbing data rates of high-speed I/O’s, equalizer circuits—and particularly decision-feedback equalizer (DFE) designs—are being pushed to operate at ever-higher speeds. At 20 to 40Gb/s data-rates,

Wi-Fi transmitters (TXs) has been continuously rising, and has hence become increasingly problematic for mobile devices. To extend battery life, the TX must be efficient not only at peak power but also at backoff, due to

Retinal implants elicit light perception for people blinded by photoreceptor loss. Commercialized 60-channel retinal prostheses allow patients to perform simple tasks, but several hundreds to a thousand electrodes are re

The 60GHz band has opened the opportunity for multi-Gb/s wireless communications, and is being commercially supported by transceiver solutions utilizing the WirelessHD and/or WiGig standards. However, the hundreds of mWs

The 60GHz band has gained great interest as an enabler for multi-Gb/s wireless links. Recent efforts [1-4] have focused on reducing transceiver power to drive adoption of 60GHz in mobile devices. To further accelerate th

The traditional inductor-based buck converter has been the dominant design for step-down switched-mode voltage regulators for decades. Switched-capacitor (SC) DC-DC converters, on the other hand, have traditionally been

A downside for all direct digital synthesizer (DDS) architectures is that every DDS has a phase accumulator (PA) whose normalized phase value φ must be updated for each (sin 2πφ, cos 2πφ) output-pair produced, and such u

One of the remaining challenges in implementing CMOS 60GHz radios is to cover longer communication distance as the high path loss at mm-Wave frequencies demands higher EIRP, which in turn requires considerable design eff

interfaces has provided hope for patients with spinal-cord injuries, Parkinson’s disease, and other debilitating neurological conditions [1], and has boosted interest in electronic recording of cortical signals. State-of

Terahertz- and mm-Wave-based imagers have recently gained interest for imaging in security screening and bio-imaging applications [1,2]. For these applications to become practical, the core pixel circuits employed in an

In order to reduce the pin count of chips and the complexity of the routing on printed-circuit boards and backplanes, it is desirable to replace a large number of parallel channels with a few serial links. Such a transfo

greatest challenges facing the designers of complex wireless SoCs. Recently, there has been a significant effort to implement PA’s in CMOS [1-4]. The 802.11g standard utilizes OFDM modulation, which has a very high peak-

input matching network of the second stage is matched with 50Ω to minimize loss while the output matching network is designed to deliver maximum output power using power contours which were determined by load-pull simula

modulator is presented that consists mostly of digital circuitry. It does not contain analog integrators, feedback DACs, comparators, or reference voltages, and does not require a lowjitter clock. Unlike conventional ΔΣ

A pipelined ADC is presented with 2 fully integrated digital background calibration techniques: harmonic distortion correction (HDC) to compensate for residue amplifier gain error and nonlinearity, and DAC noise cancella

Recent work on ADCs targeting sampling rates of hundreds of MHz with resolutions in the range of 10 to 11b has faced speed limitations with a single channel [1] or employed interleaving, but with a relatively high power

The availability of W-band (75 to 111GHz) silicon integrated circuits will potentially revolutionize medical and security imaging, as well as high-capacity wireless communications. Traditional W-band circuits rely on GaA

Wideband circuits find applications in various fields such as highspeed links, broadband radio transceivers, high-resolution radar and imaging systems. Recently, distributed amplifiers (DAs) with large bandwidths have be

Recent work on receivers for the 60GHz band has considered various frequency plans to ease the design of the building blocks, particularly the local oscillator (LO) and the frequency dividers [1-3]. A natural choice of t

Emerging applications for the 60GHz spectrum include extremely high-data-rate short-range communication systems. Many of these applications are expected to enter the realm of consumer electronics where low cost and mass

The potential of pulse-based ultra-wideband (UWB) technology has been demonstrated for high-data-rate short-distance wireless personal area networks (e.g., wireless USB) [1-3]. With the allocation of the spectrum from 3.

floors, mode matching is necessary to moderate interface power dissipation. Mode matching increases sense displacements by the sense mode quality factor and thereby relaxes the precision requirements of the front-end, bu

The opening up of the mm-wave band has created opportunities for high-data-rate communication, radar and medical imaging. The cost and size advantages of CMOS have motivated research on 60GHz CMOS front-end design [1]. H

A wake-up receiver (WuRx) is used in wireless sensor networks (WSN) to detect wireless traffic directed to a node’s receiver and activate it upon detection, improving network latency and energy dissipation by maximizing