The analysis, design, and implementation of a 50-Gb/s transimpedance amplifier (TIA) in a 0.13-μm SiGe BiCMOS process are presented. The proposed TIA, designed for use in a single-channel optical communication network, is comprised of... more
Phase-locked loops (PLL) in RF and mixed signal VLSI circuits experience supply noise which translates to a timing jitter. In this paper an analysis of the timing jitter due to the noise on the power supply rails is presented. Stochastic... more
This paper presents the design of a high efficiency, low THD, 5.7GHz fully differential power amplifier for wireless communications in a standard 0.18µm CMOS technology. The power amplifier employs a fully differential class-E topology to... more
In this paper, new formulations for the energy dissipation of lossy transmission lines driven by CMOS inverters are provided, and a new performance metric for the energy optimization under the delay constraint is proposed. The energy... more
This paper presents a detailed empirical study and analytical derivation of voltage wave-form and energy dissipation of global lines driven by CMOS drivers. It is shown that at high clock frequencies where the output voltage at the... more
In this paper the design and analysis of a novel non-uniform fully differential distributed amplifier is presented. The gainbandwidth product of the proposed amplifier designed in a 0.18µm standard CMOS process reaches a record level of... more
Scaling the minimum feature size of VLSI circuits to sub-quarter micron and the clock frequency to 2GHz has caused the crosstalk noise to become a serious problem, degrading the performance and reliability of high speed integrated... more
This paper presents the design and analysis of a novel distributed CMOS mixer for ultrawide-band (UWB) receivers. To achieve the UWB RF frequency range required for the UWB communications, the proposed mixer incorporates artificial in-... more
CMOS Phase-locked loops (PLL) are ubiquitous in RF and mixed-signal integrated circuits. A general comprehensive stochastic model of the power/ground (P/G) noise in VLSI circuits is presented. This is followed by calculation of the phase... more
This paper investigates the impact of clock jitter induced by substrate noise on the performance of the oversampling ∆Σ modulators. First, a new stochastic model for substrate noise is proposed. This model is then utilized to study the... more
In this paper we present the design and analysis of a distributed regenerative frequency divider (DRFD) based on a novel distributed single-balanced mixer. Artificial transmission lines are incorporated in the distributed single balanced... more
A 64-channel bioelectric signal acquisition system incorporating a CMOS ultra-low power amplifier array and serializer integrated circuit (IC) is presented. Each amplifier within the array employs a complementary differential topology... more
This paper is concerned with the analysis and optimization of the ground bounce in digital CMOS circuits. First, an analytical method for calculating the ground bounce is presented. The proposed method relies on accurate models of the... more
A comprehensive analytical study of high-frequency regenerative frequency dividers (RFD) is presented. The study includes two fundamental modes of operation in RFDs, namely stable and pulled operation modes. Differential equations... more
A synthesis-based bandwidth enhancing technique for current-mode-logic (CML) buffers/amplifiers is presented, which achieves bandwidth-enhancement-ratio (BWER) of 4.84, close to a proven theoretical upper limit of 4.93. By employing a... more
The design of a millimeter-wave dual-band phaselocked frequency synthesizer in a 0.18µm SiGe BiCMOS technology is presented. All circuits except the voltage controlled oscillators (VCOs) are shared between the two bands. A W-band... more
Recent studies show that peripheral circuit (including decoders, wordline drivers, input and output drivers) constitutes a large portion of the cache leakage. In addition, as technology migrates to smaller geometries, leakage contribution... more
This paper is concerned with the analysis and optimization of the ground bounce in digital CMOS circuits. First, an analytical method for calculating the ground bounce is presented. The proposed method relies on accurate models of the... more
This paper presents the design and analysis of a novel distributed CMOS mixer for ultrawideband (UWB) receivers. To achieve the UWB RF frequency range required for the UWB communications, the proposed mixer incorporates artificial... more
The design of a CMOS 22-29-GHz pulse-radar receiver (RX) front-end for ultra-wideband automotive radar sensors is presented. The chip includes a low-noise amplifier, in-phase/quadrature mixers, a quadrature voltage-controlled oscillator... more
Two monolithically integrated W-band frequency synthesizers are presented. Implemented in a 0.18 m SiGe BiCMOS with of 200/180 GHz, both circuits incorporate the same 30.3-33.8 GHz PLL core. One synthesizer uses an injection-locked... more
A CMOS distributed amplifier (DA) with distributed active input balun is presented that achieves a gain-bandwidth product of 818 GHz, while improving linearity. Each cell within the DA employs dual-output two-stage topology that improves... more
where the output voltage at the termination point of the transmission line may not reach its steady state value during the clock period, it is possible to reduce energy dissipation while meeting a DC noise margin by driver sizing. This is... more
This paper presents the design and implementation of a novel multi-antenna receiver front-end, which is capable of accommodating various multi-antenna schemes including spatial multiplexing (SM), spatial diversity (SD), and beamforming... more
CMOS Distributed Active Power Combiners and Splitters for Multi-Antenna UWB Beamforming Transceivers
This paper presents the design of the first CMOS distributed active power combiners and splitters with wideband variable delay and gain. These circuits are the key components for use in multi-antenna (MA) ultra-wideband (UWB)... more
A new second-order all-pass filter with maximum achievable delaybandwidth-product (DBW) is presented. The proposed circuit will be used as a wideband delay element in impulse radio ultra-wideband transceivers. Benefiting from a simple... more
A novel linearization technique for linear and pseudo-linear CMOS power amplifiers (PAs) is presented. The proposed technique uses the third-order harmonic of the PA output to generate a signal, which compensates the nonlinear component... more
An analysis of high-frequency noise in RF active CMOS mixers including single-balanced and doublebalanced architectures is presented. The analysis investigates the contribution of non-white gate-induced noise to the output noise power as... more
Background: Clinical treatments with typical antipsychotic drugs (APDs) are accompanied by extrapyramidal motor sideeffects (EPS) such as hypokinesia and catalepsy. As little is known about electrophysiological substrates of such motor... more
Frequency dividers play an important role in high speed communications systems. In particular, optical communication circuits demand frequency dividers capable of operating well above 10 GHz. This paper presents a high-speed... more
A comprehensive study of ultrahigh-speed currentmode logic (CML) buffers along with the design of novel regenerative CML latches will be illustrated. First, a new design procedure to systematically design a chain of tapered CML buffers is... more
Introduction Schizophrenia is a psychiatric condition in which patient adherence is a key issue in its management. Objectives To estimate the prevalence and determine the factors associated with medication adherence in patients with... more
Precision machining plays a vital role in modern, efficient, and sustainable manufacturing. Monitoring and controlling the clamping forces can influence positioning accuracy, workpiece deformation, thus improving the production outcome.... more
Scheduling problems in an FMS have been considered as complex optimization problems whose solution by conventional techniques requires a great deal of efforts and time. In this paper, a simultaneous loading and scheduling of part and tool... more
The technology of pre-saturated core fault current limiter (PCFCL) has a particular importance due to its instantaneous limitation of the fault current in electric power grids and keeping its value below the ratings of the switchgear or... more
This study aims to build a superior strategy in the company precast concrete with a Resource Based View approach at PT. ABX, as well as generate strategies in exploiting resources, capabilities, competitive advantages to create... more
Occupational health is one of the important issues that can affect productivity and economic development of an organization .This study aimed to determine the effect of didactic interventional Ergonomic-Safety Program on workers'... more
Background and Objective: Cleanroom is a tightly enclosed environment where airborne particles are under control and is a necessary environment in pharmaceutical industries to produce quality products. Hence, we sought to assess and... more
Solute-surface interactions are critical in membrane science and dominate a number of diffusion and selectivity parameters. In water treatment particularly, the charge on the membrane has been shown to affect ion transport selectivity as... more
In this paper, we present a numerical approach to solve the GNLSE and analyze soliton interaction phenomena using COMSOL environment. By leveraging the capabilities of COMSOL's PDE module, we can accurately capture the dynamics of... more
This report describes the progress in fiscal year 2010 in developing the Waste Integrated Performance and Safety Codes (IPSC) in support of the U.S. Department of Energy (DOE) Office of Nuclear Energy Advanced Modeling and Simulation... more
P a ol a 2 0 0 9. Th e r ol e of p-d o pi n g in t h e g ai n dy n a mi c s of InAs/G aAs q u a n t u m d o t s a t low t e m p e r a t u r e . Ap plie d P hy sic s Le t t e r s 9 4 (4) , 0 4 1 1 1 0 . 1 0 . 1 0 6 3/ 1. 3 0 7 5 8 5 5 file... more