ECL-Compatible Low-Power-Consumption 10-Gb/s GaAs 8:1 Multiplexer and 1:8 Demultiplexer

Nobuhide YOSHIDA
Masahiro FUJII
Keiichi NUMATA
Shuji ASAI
Michihisa KOHNO
Hirokazu OIKAWA
Tadashi MAEDA

IEICE TRANSACTIONS on Electronics   Vol.E82-C    No.11    pp.1992-1999
Publication Date: 1999/11/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on High-Frequency/High-Speed Devices for Information and Communication Systems in the 21st Century)
Category: Low Power-Consumption RF ICs
multiplexer,  demultiplexer,  GaAs,  10 Gb/s,  ECL-compatible,  low power consumption,  

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An emitter coupled logic (ECL) compatible low-power GaAs 8:1 multiplexer (MUX) and 1:8 demultiplexer (DEMUX) for 10-Gb/s optical communication systems has been developed. In order to decrease the power consumption and to maximize the timing margin, we estimated the power consumption for direct-coupled FET logic (DCFL) and source-coupled FET logic (SCFL) circuits in terms of the D-type flip-flop (D-FF) operating speed and the duty-ratio variation. Based on the result, we used SCFL circuits in the clock-generating circuit and the circuits operating at 10 Gb/s, and we used DCFL circuits in the circuits operating below 5 Gb/s. These ICs, which are mounted on ceramic packages, operate at up to 10 Gb/s with power consumption of 1.2 W for the 8:1 MUX and 1.0 W for the 1:8 DEMUX. This is the lowest power consumption yet reported for 10-Gb/s 8:1 MUX and 1:8 DEMUX.