Star sensor baffle optimization: some helpful practical design rules

1996 ◽  
Author(s):  
Jean-Jacques P. Arnoux
Keyword(s):  
Star Sensor ◽  
Design Rules ◽  
Practical Design

scholarly journals Overcoming the Realization Problems of Wideband Matching Circuits

2018 ◽  
pp. 31-36
Author(s):  
Balázs Matolcsy ◽  
Attila Zólomy
Keyword(s):  
Design Process ◽  
Circuit Simulation ◽  
Impedance Matching ◽  
Microwave Circuit ◽  
Design Rules ◽  
Analytical Design ◽  
Calculation Technique ◽  
Matching Networks ◽  
Practical Design

During the analytical design process of wideband impedance matching major problems may arise, that might lead to non-realizable matching networks, preventing the successful impedance matching. In this paper two practical design rules and a simplified equation is presented, supporting the design of physically realizable impedance matching networks. The design rules and calculation technique introduced by this paper is summarized, and validated by microwave circuit simulation examples.

scholarly journals Resistor Geometry Comparison With Respect to Current Noise and Trim Sensitivity

1977 ◽  
Vol 4 (2) ◽  
pp. 63-68 ◽  
Author(s):  
W. Ulbrich
Keyword(s):  
Finite Difference ◽  
Current Distribution ◽  
Current Noise ◽  
Total Resistance ◽  
Sheet Resistivity ◽  
Design Rules ◽  
Optimal Geometry ◽  
Practical Design ◽  
Finite Difference Solution ◽  
Resistance Value

The paper deals with laser trimming of film resistors. The finite-difference solution of the electric field calculated by a digital computer gives the total resistance and the inhomogeneous current distribution within the resistor area. The current noise voltage was found to be proportional to the sum of reciprocal subareas wherein the current density is approximately constant. Resistor trimming is modelled by finite increments of cut length to obtain the resistance trim rate and the trim sensitivity.Known and new resistor geometries and cut configurations are compared (based on the same resistor area and the same initial tolerance of ± 20%) to find the optimal geometry depending on the ratio of the nominal resistance value to the sheet resistivity. Diagrams are given leading to practical design rules not only for resistance trimming but also for deterministic and functional tuning.

scholarly journals Design Optimization of Coulomb Blockade Devices

VLSI Design ◽  
2001 ◽  
Vol 13 (1-4) ◽  
pp. 193-198
Author(s):  
H.-O. Müller ◽  
D. A. Williams ◽  
H. Mizuta
Keyword(s):  
Quantum Dots ◽  
Statistical Analysis ◽  
Design Optimization ◽  
Coulomb Blockade ◽  
Rectangular Array ◽  
Design Rules ◽  
Practical Design ◽  
Geometric Size ◽  
Device Operation

We investigate the design of a Coulomb blockade device consisting of a rectangular array of quantum dots or ultrasmall metallic islands with regard to its stability against geometric size disorder and offset charges. To simulate the device operation we perform a statistical analysis of the Coulomb blockade voltage which results in practical design rules.

scholarly journals Electrocharged facepiece respirator fabrics using common materials

2020 ◽  
Vol 476 (2243) ◽  
pp. 20200469
Author(s):  
M. M. Bandi
Keyword(s):  
Design Principles ◽  
Simple Design ◽  
Design Rules ◽  
Global Pandemic ◽  
Practical Design ◽  
Cotton Candy ◽  
Set Up ◽  
Filtration Properties ◽  
Plastic Containers

Face masks in general, and N95 filtering facepiece respirators (FRs) that protect against SARS-Cov-2 virion in particular, have become scarce during the ongoing COVID-19 global pandemic. This work presents practical design principles for the fabrication of electrocharged filtration layers employed in N95 FRs using commonly available materials and easily replicable methods. The input polymer is polypropylene or polystyrene, and can include discarded plastic containers of these materials, and the fabrication set-up is based on the cotton candy (CC) principle. The primary parameters underlying the CC principle are translated to simple design rules that allow anyone to construct their own fabrication system from common parts, or employ a commercial CC machine with minimal modifications. Finally, basic characterization results for structural and filtration properties of electrocharged fabrics made using the CC principle are detailed.

Cold End Forming of Welded Steel Tubes

2012 ◽  
pp. 226-239
Author(s):  
L. M. Alves ◽  
J. G. Medeiros ◽  
P. A. F. Martins
Keyword(s):  
Stainless Steel ◽  
Research Work ◽  
Daily Practice ◽  
Operating Parameters ◽  
Steel Tubes ◽  
Design Rules ◽  
Welded Steel ◽  
Practical Design ◽  
Market Opportunities ◽  
Thin Walled

The production of custom and specific tube end shapes by cold end forming using a die is generally limited to seamless tubular parts. Current research work in the field follows the same trend as that of industry and, therefore, there is no accumulated experience, no practical design rules, and no information available in the specialized literature concerning the utilization of tube end forming for shaping the end of thin-walled welded tubes. This paper is concerned with the lack of knowledge and is a contribution towards the understanding of the mechanics of deformation of tube end forming applied to welded tubes. The presentation addresses the influence of major operating parameters on the formability limits of the process with the purpose of understanding feasibility and establishing design rules for the benefit of those who design tubular parts in daily practice. The authors effectively contribute to transferable technological knowledge opening new market opportunities that stimulate innovations among carbon and stainless steel tubular products.

Multilevel codes: theoretical concepts and practical design rules

1999 ◽  
Vol 45 (5) ◽  
pp. 1361-1391 ◽  
Author(s):  
U. Wachsmann ◽  
R.F.H. Fischer ◽  
J.B. Huber
Keyword(s):  
Design Rules ◽  
Theoretical Concepts ◽  
Practical Design
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