Search Results - "Hemmati, Mohammad Jafar"

Novel six‐phase ring voltage controlled oscillator with wide frequency tuning range by Hemmati, Mohammad Jafar, Dehghani, Rasoul

“…Summary This paper presents more compatible three‐stage inverter‐based ring voltage controlled oscillators (VCOs) by modifying the current‐starved delay cell…”
Get full text

Low power and low phase noise complementary voltage controlled oscillator optimised by a meta‐heuristic algorithm by Hemmati, Mohammad Jafar, Mood, Sepehr Ebrahimi

“…This paper presents a differential complementary metal oxide semiconductor inductor‐capacitor voltage controlled oscillator (LC‐VCO). The VCO is adopted from…”
Get full text

Analysis and review of main characteristics of Colpitts oscillators by Hemmati, Mohammad Jafar, Dehghani, Rasoul

“…Summary In this review, different topologies of CMOS Colpitts oscillators including single‐ended and differential configurations are studied, and the main…”
Get full text

Wide Frequency Multiphase Oscillator Designed by Coupling Two Identical Ring Voltage Controlled Oscillators by Hemmati, Mohammad Jafar, Mood, Sepehr Ebrahimi, Dehnavi, Somayeh Zarei

“…This work presents a novel wide tuning range ring voltage controlled oscillator (RVCO) designed to generate six‐phase signals. The proposed circuit is realized…”
Get full text

Low-power Gm-boosted complementary Colpitts LC-VCO/QVCO by Hemmati, Mohammad Jafar, Dehghani, Rasoul, Hakimi, Ahmad, Nejad, Sajad Naderi

“…In this work, a new differential topology of Colpitts VCO with an enhanced transconductance is presented. The proposed circuit is consisted of an NMOS and a…”
Get full text

Design optimization of the complementary voltage controlled oscillator using a multi-objective gravitational search algorithm by Ebrahimi, Sepehr Mood, Hemmati, Mohammad Jafar

“…Past decade has witnessed the progress of cross-coupled LC voltage controlled oscillator (VCO) in both academic and industrial communities. In this work, a new…”
Get full text

A 6-GHz capacitively-coupled Colpitts CMOS quadrature voltage controlled oscillator by Hemmati, Mohammad Jafar, Naseh, Sasan

“…In this work a new low-noise low-power Colpitts quadrature voltage controlled oscillator (QVCO) made by coupling two identical current-switching differential…”
Get full text

A second-harmonic LC-quadrature voltage controlled oscillator with direct connection of MOSFETs’ substrate by Hemmati, Mohammad Jafar, Naseh, Sasan

“…This work introduces a new low noise second-harmonic quadrature voltage controlled oscillator (QVCO) made by coupling two identical cross-connected LC voltage…”
Get full text

CMOS second-harmonic quadrature voltage controlled oscillator using substrate for coupling by Hemmati, Mohammad Jafar, Naseh, Sasan

“…In this work, a new circuit configuration for second-harmonic quadrature voltage controlled oscillator (QVCO) with CMOS technology is proposed. The proposed…”
Get full text

A CMOS quadrature VCO with optimized Colpitts topology for low-voltage applications by Hemmati, Mohammad Jafar, Hakimi, Ahmad

“…In this work, a new configuration of differential drain-to-source Colpitts LC voltage controlled oscillator (VCO) is proposed for low voltage applications. The…”
Get full text

A low-voltage swing-enhanced Colpitts CMOS LC-QVCO based on first-harmonics coupling by Hemmati, Mohammad Jafar, Dehghani, Rasoul, Hakimi, Ahmad

“…This work presents the design of a new low-voltage Colpitts LC quadrature voltage controlled oscillator (LC-QVCO). The proposed QVCO consists of two identical…”
Get full text

Design of Low-Power Differential CMOS LC Voltage Controlled Oscillator using Genetic Algorithm by Hemmati, Mohammad Jafar, Mood, Sepehr Ebrahimi

“…A new configuration of differential CMOS LC voltage controlled oscillator (VCO) is presented and analyzed in this work. The proposed circuit is a complementary…”
Get full text

A new differential colpitts divide-by-2 injection locked frequency divider by Nejad, Sajad Naderi, Hemmati, Mohammad Jafar, Hakimi, Ahmad

“…In this work, a new differential injection locked frequency divider is proposed. The circuit is realized with a current-switching colpitts voltage controlled…”
Get full text

A low power 9GHz divide-by-3 injection locked frequency divider in 0.18μm CMOS with 15% locking range by Asadian, S., Hemmati, M. J., Naseh, S.

“…A new low power divide-by-3 injection locked LC divider is proposed for PLL-based frequency synthesizers. The circuit is made of two voltage controlled…”
Get full text