A Noise Source Impedance Extraction Method for Operating SMPS Using Modified LISN and Simplified Calibration Procedure

2017 ◽  
Vol 32 (6) ◽  
pp. 4132-4139 ◽  
Author(s):  
Xiaofan Shang ◽  
Donglin Su ◽  
Hui Xu ◽  
Zhenzhen Peng
Keyword(s):  
Extraction Method ◽  
Noise Source ◽  
Calibration Procedure ◽  
Source Impedance ◽  
Impedance Extraction

A Sub-Pixel Extraction Method for the Center of the Circular Structure from Spot Array Calibration Target

2012 ◽  
Vol 236-237 ◽  
pp. 1090-1094
Author(s):  
Yang Chuan Liu ◽  
Xin Gao ◽  
Chuan Xu ◽  
Wei Wei Fu ◽  
Yun Teng ◽  
...  
Keyword(s):  
Edge Detection ◽  
Extraction Method ◽  
Calibration Procedure ◽  
Ellipse Fitting ◽  
Calibration Target ◽  
Circular Structure ◽  
Array Calibration ◽  
Simulated Images ◽  
Facet Model ◽  
Spot Array

The imaging measurement system must be calibrated before application. In calibration procedure, sub-pixel center extraction is the crucial step for the final accuracy. In this paper, a new sub-pixel extraction method is proposed. Edge detection at pixel level is obtained using LOG operator, then sub-pixel edge detection is realized using the Facet model. Finally, the least squares ellipse fitting is operated on the sub-pixel edge to determine the sub-pixel center. Experiment on a series of simulated images indicates that this algorithm is able to realize the center location accuracy of 0.01-0.02 pixel, and meets the requirement of sub-pixel level.

scholarly journals PCB access impedances extraction method of in-situ integrated circuit

2018 ◽  
Vol 7 (3) ◽  
pp. 108-116 ◽  
Author(s):  
Z. Xu ◽  
B. Ravelo ◽  
J. Gantet ◽  
N. Marier
Keyword(s):  
Integrated Circuits ◽  
Transmission Lines ◽  
Integrated Circuit ◽  
Extraction Method ◽  
Printed Circuit Boards ◽  
Voltage Source ◽  
Circuit Boards ◽  
Passive Network ◽  
Impedance Extraction ◽  
Network Good

This article describes an extraction technique of input and output impedances of integrated circuits (ICs) implemented onto the printed circuit boards (PCBs). The feasibility of the technique is illustrated with a proof-of-concept (POC) constituted by two ICs operating in a typically transmitter-receiver (Tx-Rx) circuit. The POC system is assumed composed of three different blocks of emitter signal source, load and interconnect passive network. This latter one is assumed defined by its chain matrix known from its electrical and physical characteristics. The proposed impedance extraction method is elaborated from the given signals at the transmitter output and receiver input. The terminal access impedances are formulated in function of the parameters of the interconnect system chain matrix. The feasibility of the method is checked with a passive circuit constituted by transmission lines driven by voltage source with RL-series network internal impedance and loaded at the output by the RC-parallel network. Good correlation between the access impedance reference and calculated is found.

Optimization of EMI Filter with Consideration of the Noise Source Impedance for DC/DC Converter

2021 ◽  
pp. 167-178
Author(s):  
Achim Vedde ◽  
Martin Neuburger ◽  
Konstantin Spanos ◽  
Hans-Christian Reuss
Keyword(s):  
Noise Source ◽  
Source Impedance ◽  
Emi Filter

Identifying Electromagnetic Noise-Source Impedance Using Hybrid of Measurement and Calculation Method

2019 ◽  
Vol 34 (10) ◽  
pp. 9609-9618 ◽  
Author(s):  
Feng Zheng ◽  
Wugang Wang ◽  
Xiaofan Zhao ◽  
Mengke Cui ◽  
Qiang Zhang ◽  
...  
Keyword(s):  
Calculation Method ◽  
Noise Source ◽  
Electromagnetic Noise ◽  
Source Impedance ◽  
Measurement And Calculation Method
Sign in / Sign up

Export Citation Format

Share Document