High-Speed 8:1 Multiplexer and 1:8 Demultiplexer Implemented with Algaas/GaAs HBT's

R. B. Nubling, James Yu*, Keh Chung Wang, Peter M. Asbeck, Neng Haung Sheng, Mau-Chung Chang, R. L. Pierson, G. J. Sullivan, Mark A. Mcdonald, A. J. Price, A. D.M. Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


An 8:1 multiplexer (MUX) and a 1:8 demultiplexer (DMUX) implemented with AlGaAs/GaAs heterojunction bipolar transistors are described. The circuits were designed for lightwave communications, and were demonstrated to operate at data rates above 6 Gb/s. These are among the fastest 8-b MUX-DMUX circuits ever reported. Each contains about 600 transistors and consumes about 1.5 W. The pair provides features such as resettable timing, data framing, and clock recovery circuitry, and a built-in decision circuit on the DMUX. ECL-compatible I/O signals are available. The circuits were implemented with bi-level CML logic and require a — 5.2-V power supply and a + 1-V bias for ECL compatibility.

Original languageEnglish
Pages (from-to)1354-1361
Number of pages8
JournalIEEE Journal of Solid-State Circuits
Issue number10
StatePublished - 1 Jan 1991

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