Design of multiple power domains based on ground separation technique for low-noise and small-size module

This paper presents the design of multiple power domains based on filters connecting the separated grounds for a low-noise and small-area module. The sensor module system was composed with analog ICs, digital ICs, and a network process on a PCB of 30 mm × 120 mm and eight layers. Powers of the modul...

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Bibliographic Details
Published in2012 Asia-Pacific Symposium on Electromagnetic Compatibility pp. 805 - 808
Main Authors Dong-Ho Lee, Young-San Shin, Chang-Gyun Kim, Jin-Ho Song, Jae-Kyung Wee, Jeong-Min Lee, Jae-Soo Seol
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.05.2012
Subjects
Computational modeling
Educational institutions
Impedance
Noise
Noise measurement
Noise Reduction
PDN
Power Filter
Power filters
Switches
Via Stitching
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Summary:This paper presents the design of multiple power domains based on filters connecting the separated grounds for a low-noise and small-area module. The sensor module system was composed with analog ICs, digital ICs, and a network process on a PCB of 30 mm × 120 mm and eight layers. Powers of the module consisted of 5V, -5V, 2.5V, -2.5V, and 3.3V by DC-DC ICs and LDO drown from input voltage of 60V. The multiple power domains require ground connection because of common DC ground. For the prevention of high-voltage DC-DC noise, we proposed the ground-isolated technique, connecting grounds with a series of ground filters instead of conventional methods, i.e., a parallel connection with filters between power domains or a common module ground between all power domains. Also, multiple power planes and via stitching are used for low impedance and EMI reduction. The transient simulation shows the clear improvement of transferred noises by about -17 dB reduction, and the measurement results showed an 18% noise voltage reduction compared with common ground techniques.
ISBN:1457715570
9781457715570
ISSN:2162-7673
2640-7469
DOI:10.1109/APEMC.2012.6237922