Daisy Chain Transmitter for Power Reduction in Inductive-Coupling CMOS Link

Kiichi NIITSU
Noriyuki MIURA
Mari INOUE
Yoshihiro NAKAGAWA
Masamoto TAGO
Masayuki MIZUNO
Takayasu SAKURAI
Tadahiro KURODA

Publication
IEICE TRANSACTIONS on Electronics   Vol.E90-C    No.4    pp.829-835
Publication Date: 2007/04/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e90-c.4.829
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Low-Power, High-Speed LSIs and Related Technologies)
Category: Analog and Communications
Keyword: 
low power,  daisy chain,  inductive coupling,  wide bandwidth,  

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Summary: 
A daisy chain of current-driven transmitters in inductive-coupling complementary metal oxide semiconductor (CMOS) links is presented. Transmitter power can be reduced since current is reused by multiple transmitters. Eight transceivers are arranged with a pitch of 20 µm in 0.18 µm CMOS. Transmitter power is reduced by 35% without sacrificing either the data rate (1 Gb/s/ch) or BER (<10-12) by using a 4-transmitter daisy chain. A coding technique for efficient use of daisy chain transmitters is also proposed. With the proposed coding technique, additional power reduction can be achieved.