System level modeling of supply noise induced jitter for high speed clock forwarding interfaces

2016 ◽  
Vol 5 (4) ◽  
pp. 117-122 ◽  
Author(s):  
Yujeong Shim ◽  
Dan Oh
Keyword(s):  
High Speed ◽  
System Level ◽  
System Level Modeling ◽  
Supply Noise

scholarly journals Modular System-Level Modeling Method for the Susceptibility Prediction of Balise Information Transmission System

2020 ◽  
Vol 10 (21) ◽  
pp. 7944
Author(s):  
Dan Zhang ◽  
Yinghong Wen ◽  
Jinbao Zhang ◽  
Jianjun Xiao ◽  
Yali Song ◽  
...  
Keyword(s):  
High Speed ◽  
Electromagnetic Compatibility ◽  
Theoretical Method ◽  
Simulation Method ◽  
Physical Structure ◽  
Modeling Method ◽  
Test Method ◽  
System Level ◽  
Modular System ◽  
System Level Modeling

For high-speed train, balise transmission module (BTM) system is easily interfered with by other equipment of the train. This could cause the train to malfunction. Studying the electromagnetic susceptibility (EMS) of the BTM is very important for the performance and efficiency of the train. In this paper, a modular, system-level modeling method is proposed to predict the EMS of BTM systems. Based on object-oriented technology and a modular method, the BTM system is disassembled into several modules according to the electromagnetic characteristics of the whole system rather than the physical structure. All the modules are mutually independent, and the total EMS could be evaluated by the output of them. The modules of three key elements of electromagnetic compatibility (EMC), i.e., sources, coupling paths, and sensitive equipment, are established by the theoretical method, full-wave simulation method, and black-box test method, respectively, and put into different layers. According to the functions of the BTM system, the EMS of BTM is given by analyzing the interrelation of input and output of modules. Results of the proposed model were verified by measurement.

Assessment of Viscous Flows in High-Speed Micro Rotating Machinery for Energy Conversion Applications

2001 ◽  
Author(s):  
Luc G. Fréchette
Keyword(s):  
Shear Flow ◽  
Energy Conversion ◽  
Viscous Flow ◽  
High Speed ◽  
Applied Pressure ◽  
Secondary Flows ◽  
System Level ◽  
Flow Profile ◽  
System Level Design ◽  
Level Design

Abstract This paper investigates the characteristics of viscous flow in the micron-scale clearances surrounding high-speed micro-rotors currently being developed for miniature energy conversion applications. Analysis and experimental results from 4 mm diameter microfabricated rotors operated above 1 million rpm are used to describe the viscous flow characteristics, and provide guidelines for system-level design. To first order, the flow is characterized as fully developed shear flow (Couette flow) across the small gaps, induced by the rotor motion. However, secondary flows are induced perpendicular to the direction of rotor motion when externally applied pressure gradients exist along the small gaps. The developing flow in the entrance region of the small gaps in this secondary flow direction impacts the shear flow profile, hence affecting the drag on the disk. The effect of other inertial forces, such as Coriolis and centrifugal forces, are investigated analytically and numerically and found to affect the shear flow profile on the fluid in the motor gap at high rotational speeds. Since viscous losses are prevelant in microsystems, appropriate modeling is necessary for system-level design.

Sign in / Sign up

Export Citation Format

Share Document