A High-Performance Common-Mode Noise Absorption Circuit Based on Phase Modification Technique

In this article, a high-performance common-mode noise absorption circuit (CMNAC) is proposed for solving electromagnetic interference (EMI) or radio-frequency interference (RFI) problems in high-speed differential digital systems. Instead of reflecting common-mode noises by conventional common-mode...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2019-11, Vol.67 (11), p.4394-4403
Main Authors: Chan, Chao-Kai, Wu, Tzong-Lin
Format: Article
Language:English
Subjects:
Absorption
Absorptive filter
Attenuation
Circuits
common-mode filter (CMF)
common-mode noise
common-mode noise absorption circuit (CMNAC)
Delays
differential signaling
Digital systems
Electric noise
Electromagnetic interference
electromagnetic interference (EMI)
eye diagram
Group delay
High speed
lossy circuit
Microwave circuits
Radio frequency interference
radio-frequency interference (RFI)
Signal transmission
Transfer functions
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this article, a high-performance common-mode noise absorption circuit (CMNAC) is proposed for solving electromagnetic interference (EMI) or radio-frequency interference (RFI) problems in high-speed differential digital systems. Instead of reflecting common-mode noises by conventional common-mode filters (CMFs), the common-mode noises can be absorbed in the proposed circuit. In addition, the phase modification technique is utilized to enhance the common-mode noise absorption rate and the differential-mode eye diagram in this CMNAC. In the common-mode half circuit (CMHC), the phase inversion of the subnetwork adds a destructive combination of the stopband energy, resulting in higher stopband attenuation. In the differential-mode half circuit (DMHC), the phase linearization leads to flat group delay, reducing the distortion in highspeed digital signal transmission in the lumped circuit. Using a standard integrated passive device (IPD) process, this CMNAC is implemented for the demonstration. The circuit occupies an area of only 1.138 mm × 0.822 mm. From the measured results, the proposed circuit exhibits the common-mode suppression level larger than 15 dB from 4 to 20 GHz and the absorption rate over 90% from 3.8 to 17.4 GHz with a fractional bandwidth 128%. In addition, the measured eye diagram shows that the proposed circuit can support high-speed transmission up to 10 Gb/s.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2019.2940015