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IBM Journal of Research and Development  
Volume 35, Number 3, Page 313 (1991)
IBM Enterprise System/9000 air-cooled proc...
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Differential current switch-High performance at low power

by E. B. Eichelberger, S. E. Bello
The recent IBM System/390® announcement includes six high-performance air-cooled models that use a low-power variation of emitter-coupled logic (ECL). This new logic family, called differential current switch (DCS), uses differential signal pairs to represent logic signals, and combines two-level cascode logic with dotting to implement a complete set of logic circuits. These DCS circuits are described in detail, and the relative value of the DCS and ECL logic families is discussed extensively.
Related Subjects: Logic; Semiconductor technology