A novel common-mode filter (CMF) design based on signal interference technique

Author

Chein-Hua Hung ; Chih-Ying Hsiao ; Tzong-Lin Wu

Author_Institution

Dept. of Electron. Eng., Nat. Taiwan Univ., Taipei, Taiwan

fYear

2014

fDate

14-16 Dec. 2014

Firstpage

125

Lastpage

128

Abstract

The signal interference technique is firstly employed to design the common-mode filter (CMF) for differential digital circuit applications. Using the network analysis, design curves for three common-mode transmission zeros are available by simple steps. A test sample is realized in two-layer PCB. The fractional bandwidth of common-mode suppression band (|S_cc21| <; -10 dB) is 63 %, from 3.85 GHz to 7.4 GHz. The transmission coefficient of differential mode (|S_dd21|) is better than -3 dB from DC up to 10 GHz in measurement. The flat differential-mode group delay implies this CMF can preserve good signal integrity, which is obvious by eye diagram measurement in time domain.

Keywords

filtering theory; interference (signal); printed circuits; CMF; common-mode suppression band; common-mode transmission zeros; differential digital circuit applications; eye diagram measurement; fractional bandwidth; novel common-mode filter design; signal interference technique; time domain; two-layer PCB; Delays; Electromagnetic interference; Filtering theory; Integrated circuit modeling; Microwave filters; Testing; common mode; differential signaling; digital circuits; electromagnetic interference (EMI);

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Design of Advanced Packaging & Systems Symposium (EDAPS), 2014 IEEE

Conference_Location

Bangalore

Type

conf

DOI

10.1109/EDAPS.2014.7030831

Filename

7030831