category » Circuits & Systems

Efficient, Reliable Energy Buffer for Grid-interface Power Conversion with Switched Capacitor Architecture
  • A buffering strategy that utilizes the ability of a capacitor to efficiently operate over a wide voltage range allows increasing…


A 10-b, 1GS/s Time-interleaved SAR ADC with a Background Timing-skew Calibration
  • Figure 1 shows the block diagram of the proposed time-interleaved analog digital converter (ADC) with the associated timing diagram. The…


Numerical Computation Platform Designed for Optimization
  • Significant effort is spent researching hardware and software acceleration of basic building blocks for numerical computation[1][2][3]; however, the majority of…


A Continuous-Time Bandpass Delta-Sigma Modulator
  • Bandpass delta-sigma modulators (BPDSMs) are a good solution for modern receiver systems. They digitize analog signals directly from the intermediate…


A Monolithically-integrated Optical Carrier-injection Ring Modulator and All-digital Driver Circuit in Commercial 45-nm SOI
  • A monolithically integrated photonic modulator and driver circuit is a key building block toward realizing a dense and energy-efficient communication…


4K Ultra HD Video Decoder for H.265/HEVC
  • High Efficiency Video Coding (HEVC)[1], the latest video standard, uses larger and variable-sized coding units and longer interpolation filters than…


Integrated Microring Tuning in Deep-trench Bulk CMOS
  • Wavelength-division multiplexed (WDM) silicon-photonic links form a promising alternative to traditional electrical interconnects. However, the essential component of these WDM…


Two-stage Power Conversion Architecture for an LED Driver Circuit
  • LED lighting promises unprecedented reductions in energy consumption, but it comes with an as-yet unmet demand for high power density,…


Flexible High-Density MoS2 Sensor Arrays for Monitoring Action Potentials
  • Monolayer MoS2, a transition metal dichalcogenide, is a novel flexible semiconducting material with a 1.8 eV direct band gap.¬† Recent…


Time-interleaved A/D Converters
  • There is an ever-increasing demand for high-resolution and high-accuracy A/D converters in communication systems. In order to raise the sampling…


A Unified Charge-current VS Compact Model for Graphene Transistors Applicable in Analog Circuit Simulations
  • With its rich physics, graphene has properties that make it a viable candidate for implementing electronic devices. For example, graphene…


Beyond Equalization: Model Predictive Control
  • As CMOS technology scales down and the need for higher data rates increases, non-ideal channel characteristics play a critical role…


Continuous-time Delta-sigma Analog-to-digital Converters for Application to Multiple-input Multiple-output Systems
  • As wireless communication technology is rapidly advancing, new wireless applications are continuously developed. Figure 1 shows each application space and…


Low-power Memory Circuits
  • Transistor scaling has resulted in integration of more functionality on a single die. On-chip memories are responsible for a large…


A 93% Efficiency Reconfigurable Switched-Capacitor DC-DC Converter Using On-Chip Ferroelectric Capacitors
  • Switched-Capacitor (SC) DC-DC converters have gained significant interest as promising candidates for ¬†integrated power conversion solution that eliminates the need…


Self-powered Long-range Wireless Microsensors for Industrial Applications
  • Improved monitoring of industrial equipment through the use of vast networks of small, easily installed, long-lasting, reliable wireless sensor nodes…


A 90.6%, 11-MHz, 22-W LED Driver using GaN FETs and a Burst Mode Controller
  • With the advent of reliable, high-brightness and high-efficacy LEDs, the lighting industry is expected to see a significant growth in…


High-efficiency Resonant dc/dc Converter Utilizing a Resistance Compression Network
  • This project presents a new topology for a high-efficiency dc/dc resonant power converter that utilizes a resistance compression network[1],[2]. ¬†Unfortunately,…


Single-cycle On-chip Traversal Using SMART Networks-on-chip
  • High-performance chips nowadays use multiple processing cores on the same die, connected by a network-on-chip (NoC). The NoC is a…


An Ingestible Pill for Ultrasound Imaging of Small Intestine
  • The small intestine is one of the most difficult organs to image because of its length and narrow winding path….


Erbium Silicon Photonic Integrated Oscillators and Radar (ESPIOR)
  • A novel device, erbium silicon photonic integrated oscillators and radar (ESPIOR), is composed of state-of-the-art silicon photonics and erbium-ytterbium based…


Building Compressed Sensing Systems
  • Compressed sensing (CS) is a sub-Nyquist sampling technique[1] with under-explored implementation potential. In this multi-disciplinary project, we analyze CS circuit…


Designing Complex Digital Systems with Scaled Nano-electro-mechanical Relays
  • Silicon CMOS circuits have a well-defined lower limit on their achievable energy efficiency due to sub-threshold leakage. Once this limit…


Photonic Processor-DRAM Interface
  • Integrated photonic interconnects enable new possibilities for bandwidth and energy-efficiency driven VLSI applications, such as many-core processor systems, by removing…


A Wearable, Long-term Cardiac Monitor
  • We have developed an experimental cardiac monitor for long-term data acquisition and analysis. The monitor consists of a central printed…


Graphene-based Wide-spectrum CMOS Image Sensor
  • CMOS image sensors are widely used in digital multimedia applications, and its performance ramps up every year with denser integration,…


CAPLET: Field-solver Accurate Real-time Capacitance Extraction Toolkit using Instantiable Basis Functions
  • Traditional capacitance extraction for VLSI interconnects usually adopts 2D scanning and table look-up methods for fast extraction at acceptable accuracy….


Statistical Modeling with the Virtual Source MOSFET Model
  • In this work, a statistical extension of the ultra-compact virtual source (VS) MOSFET model is developed here for the first…


Analog Front-end Design for Wearable Ultrasound Systems
  • The capacitive micromachined ultrasound transducer (CMUT) is an alternative to traditional piezoelectric transducers. The CMUT technology provides an opportunity for…


A Subdermal EEG Monitor for Seizure Detection
  • Epilepsy is a common chronic neurological disorder that affects about 1% of the world population[1]. It is characterized by repeated…


Universal Village: Our Desired Living Conditions
  • Due to the growing populations in cities, resources for city and village residents have become scare while costs for public…


An Electronically Steered, Wearable Transcranial Doppler Ultrasound System
  • The central objective of critical care for patients affected by neurotrauma, cerebrovascular accident (i.e., stroke), and other neurovascular pathologies is…


A Wearable Vital-signs Monitor at the Ear
  • Vital signs such as heart rate, blood pressure, blood oxygenation, cardiac output, and respiratory rate are necessary in determining the…


Body Coupled Communication
  • Body coupled communication (BCC) uses the conductive tissues in the body as a channel to form a body area network…


Stochastic Testing Method for Transistor-level Uncertainty Quantification
  • Design and fabrication uncertainties have become an important issue in nano-scale integrated circuit design. Such uncertainties are typically randomly distributed,…


Uncertainty Quantification for the Periodic Steady State of Forced and Autonomous Circuits
  • Designers are particularly interested in periodic steady-state (PSS) analysis when designing analog/RF circuits or power electronic systems. Such circuits include…


Low-power High-performance SAR ADC with Redundancy and Digital Background Calibration
  • A. H. Chang, H.-S. Lee, D. S. Boning Sponsorship: Masdar Institute of Science and Technology There is a growing demand…