scholarly journals Calculations of planar defect energies in substitutional alloys using the special-quasirandom-structure approach

2016 ◽  
Vol 93 (9) ◽  
Author(s):  
Maarten de Jong ◽  
Liang Qi ◽  
David L. Olmsted ◽  
Axel van de Walle ◽  
Mark Asta
Keyword(s):  
Planar Defect ◽  
Structure Approach ◽  
Defect Energies ◽  
Substitutional Alloys

EXPERIMENTAL AND THEORETICAL SOFT X-RAY EMISSION SPECTRA OF Cu-Pd SUBSTITUTIONAL ALLOYS

1987 ◽  
Vol 48 (C9) ◽  
pp. C9-1059-C9-1062
Author(s):  
P. J. DURHAM ◽  
C. F. HAGUE ◽  
J.-M. MARIOT ◽  
W. M. TEMMERMAN
Keyword(s):  
Emission Spectra ◽  
X Ray ◽  
Substitutional Alloys

Improving VANET Protocols using Graph Structure Approach

2018 ◽  
Vol 6 (6) ◽  
pp. 816-821
Author(s):  
Jagtar Singh ◽  
Sanjay Singla ◽  
Surender Jangra
Keyword(s):  
Graph Structure ◽  
Structure Approach

A Latent Structure Approach to Measuring Reputation

2003 ◽  
Vol 69 (4) ◽  
pp. 966-977
Author(s):  
Kwamena K. Quagrainie ◽  
Jill J. McCluskey ◽  
Maria L. Loureiro
Keyword(s):  
Latent Structure ◽  
Structure Approach

scholarly journals Analysis of Non-Idealities on CMOS Passive Mixers

Electronics ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 1105
Author(s):  
Antonio D. Martinez-Perez ◽  
Francisco Aznar ◽  
Guillermo Royo ◽  
Santiago Celma
Keyword(s):  
Final Section ◽  
Cmos Technology ◽  
Monte Carlo Analysis ◽  
Image Rejection ◽  
Structure Approach ◽  
Quadrature Scheme ◽  
Current State ◽  
The Cost ◽  
Image Rejection Ratio ◽  
The Ideal

In the current state of the art, WiFi-alike standards require achieving a high Image Rejection Ratio (IRR) while having low power consumption. Thus, quadrature structures based on passive ring mixers offer an attractive and widely used solution, as they can achieve a high IRR while being a passive block. However, it is not easy for the designer to know when a simple quadrature scheme is enough and when they should aim for a double quadrature structure approach, as the latter can improve the performance at the cost of requiring more area and complexity. This study focuses on the IRR, which crucially depends on the symmetry between the I and Q branches. Non-idealities (component mismatches, parasitics, etc.) will degrade the ideal balance by affecting the mixer and/or following/previous stages. This paper analyses the effect of imbalances, providing the constraints for obtaining a 40 dB IRR in the case of a conversion from a one-hundred-megahertz signal to the five-gigahertz range (upconversion) and vice versa (downconversion) for simple and double quadrature schemes. All simulations were carried out with complete device models from 65 nm standard CMOS technology and also a post-layout Monte Carlo analysis was included for mismatch analysis. The final section includes guidelines to help designers choose the most adequate scheme for each case.

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