Publications by Seyed Armin Tajalli

Related publications (48)

Power-Performance Scalable Integrated Circuit Design Using Subthreshold MOS

The potentials of subthreshold metal-oxide-semiconductor (MOS) solid-state devices for implementing widely adjustable performance integrated circuits with very low power consumption have been investigated. The main concentration of this work is developing ...

EPFL2010

An area and power optimization technique for CMOS bandgap voltage references

Seyed Armin Tajalli

This article explores the main tradeoffs in design of power and area efficient bandgap voltage reference (BGR) circuits. A structural design methodology for optimizing the silicon area and power dissipation of CMOS BGRs will be introduced. For this purpose ...

Springer US2010

Subthreshold Leakage Reduction: A Comparative Study of SCL and CMOS Design

Yusuf Leblebici, Seyed Armin Tajalli

The large subthreshold leakage current of static CMOS logic circuits designed in modern nanometer-scale technologies is one of the main barriers for implementing ultra-low power digital systems. Subthreshold source-coupled logic (STSCL) circuits are based ...

IEEE2009

A Time-Division Multiplexing Signaling Scheme for Inter-Symbol/Channel Interference Reduction in Low-Power Multi-Drop Memory Links

Yusuf Leblebici, Seyed Armin Tajalli, Gain Kim, Kiarash Gharibdoust, Chen Cao

A time-division multiplexing (TDM) digital channel coding scheme with inter-symbol interference (ICI) reduction property for multi-drop memory interfaces has been proposed. Shaping the TX spectrum to avoid channel frequency notches, the proposed digital TD ...

Ieee-Inst Electrical Electronics Engineers Inc2017

A Subthreshold Current-Sensing Sigma-Delta Modulator for Low-Voltage and Low-Power Sensor Interfaces

Yusuf Leblebici, Alexandre Schmid, Seyed Armin Tajalli, Nikola Katic

A continuous-time (CT) ΣΔ modulator for sensing and direct analog-to-digital conversion of nA-range (subthreshold) currents is presented in this work. The presented modulator uses a subthreshold technique based on subthreshold source-coupled logic cells to ...

Wiley2015

A Widely-Tunable and Ultra-Low-Power MOSFET-C Filter Operating in Subthreshold

Yusuf Leblebici, Seyed Armin Tajalli

A very wide tuning range ultra-low-power MOSFET-C filter is presented. The wide tuning range in this filter has been achieved without using any switchable components or programmable building blocks, and the cutoff frequency of the filter can be adjusted si ...

IEEE2009

Subthreshold Current-Mode Delta-Sigma Quantizer with 3-Decade Scalable Sampling Rate and pico-Ampere Range Resolution

Yusuf Leblebici, Seyed Armin Tajalli

A current-mode

\Delta\Sigma

analog-to-digital data converter (ADC) for biomedical readout front-end systems is being presented. The core of this circuit is a current-controlled ring oscillator (CCO) whose oscillation frequency is proportional to the inpu ...

2010

A Slew Controlled LVDS Output Driver Circuit in 0.18um CMOS Technology

Yusuf Leblebici, Seyed Armin Tajalli

This article presents a power-efficient low-voltage differential signaling (LVDS) output driver circuit. The proposed approach helps to reduce the total input capacitance of the LVDS driver circuit and hence relaxes the tradeoffs in designing a low-power p ...

2009

Subthreshold Source-Coupled Logic Circuits for Ultra Low Power Applications

Yusuf Leblebici, Seyed Armin Tajalli, Eric Vittoz

This article presents a novel approach for implementing ultra-low power digital components and systems using source-coupled logic (SCL) circuit topology, operating in weak inversion (sub-threshold) regime. PMOS transistors with shorted drain-substrate cont ...

2008

Tradeoffs in Design of Low-Power Gated-Oscillator CDR Circuits

Yusuf Leblebici, Seyed Armin Tajalli, Paul Victor Georges Muller

This article describes some techniques for implementing low- power clock and data recovery (CDR) circuits based on gated- oscillator (GO) topology for short distance applications. Here, the main tradeoffs in design of a high performance and power-efficient ...

2007

Design Tradeoffs in Ultra-Low-Power Digital Nano-Scale CMOS

Yusuf Leblebici, Seyed Armin Tajalli

In ultra-low-power (ULP) applications, the supply voltage is generally reduced well below threshold voltage of MOS devices in order to limit dissipation and to control the device leakage current due to the subthreshold channel residual current. However, re ...

Institute of Electrical and Electronics Engineers2011

Low-Power and Widely-Tunable Linearized Biquadratic Low-Pass Transconductor-C Filter

Yusuf Leblebici, Seyed Armin Tajalli

A sixth-order low-pass

g_m

-C filter with a very wide tuning range (

f_c

= 100 Hz to 10 MHz) is presented. The wide tuning range has been achieved without using switchable components or programmable building blocks. A single stage folded-cascode transcon ...

Institute of Electrical and Electronics Engineers2011

Analysis and Characterization of Variability in Subthreshold Source-Coupled Logic Circuits

Yusuf Leblebici, Alexandre Schmid, Mahsa Shoaran, Seyed Armin Tajalli

This article explores the effect of device parameter variations on the performance of subthreshold source-coupled logic (STSCL) circuits. A test chip has been fabricated in a standard CMOS 90 nm technology to study the matching properties of STSCL circuits ...

2015

A 10b SAR ADC with Widely Scalable Sampling Rate and AGC Amplifier Front-End

Yusuf Leblebici, Seyed Armin Tajalli, Firat Çelik, Ayça Akkaya

This paper presents a low power successive approximation register (SAR) ADC and its front-end automatic gain control (AGC) amplifier designed in 65nm CMOS technology. Digitally controlled variable gain amplifier (VGA) in AGC loop is used to maximize the dy ...

IEEE2018

A Power-Efficient LVDS Driver Circuit in 0.18-μm CMOS Technology

Yusuf Leblebici, Seyed Armin Tajalli

This article presents a power-efficient and low-voltage CMOS output driver circuit based on low-voltage differential signaling (LVDS) standard. To reduce the ringing at the output of the proposed driver circuit and simultaneously keep the power consumption ...

IEEE Service Center2007

Ultra-Low Power Mixed-Signal Design Platform Using Subthreshold Source-Coupled Circuits

Yusuf Leblebici, Seyed Armin Tajalli

This article discusses system-level techniques to optimize the power-performance trade-off in subthreshold circuits and presents a uniform platform for implementing ultra-low power power-scalable analog and digital integrated circuits. The proposed techniq ...

DATE2010

A Review on Quantum Computing: From Qubits to Front-end Electronics and Cryogenic MOSFET Physics

Jean-Michel Sallese, Arnout Lodewijk M Beckers, Farzan Jazaeri, Seyed Armin Tajalli

Quantum computing (QC) has already entered the industrial landscape and several multinational corporations have initiated their own research efforts. So far, many of these efforts have been focusing on superconducting qubits, whose industrial progress is c ...

IEEE2019

ISI Sensitivity of PAM Signaling for Very High-Speed Short-Reach Copper Links

Yusuf Leblebici, Seyed Armin Tajalli, Firat Çelik, Ayça Akkaya

This paper presents a comparative study, analyzing the potentials of pulse amplitude modulation (PAM) for implementing next generation high-speed copper wireline links. This comparative study analyzes the sensitivities of PAM2, PAM4 and PAM8 to inter-symbo ...

IEEE2019

Jitter Analysis and Measurement in Subthreshold Source-Coupled Differential Ring Oscillators

Yusuf Leblebici, Mahsa Shoaran, Seyed Armin Tajalli

The jitter and the phase noise of ring oscillators utilizing subthreshold source-coupled logic (STSCL) style are analyzed in this paper. Closed-form equations are derived to predict the jitter and phase noise caused by white and flicker noise. Measurement ...

2015

Implementing Ultra-high-Value Floating Tunable CMOS Resistors

Yusuf Leblebici, Seyed Armin Tajalli

A compact high-value ﬂoating resistor utilising PMOS devices in the subthreshold region is introduced. A test chip has been fabricated in 0.18 um CMOS technology to verify the proposed concept. This technique has been applied to design a reconﬁgurable sixt ...

2008