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A circuit technology for sub-10-ns ECL 4-Mb BiCMOS DRAM's

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10 Author(s)

The feasibility of realizing an emitter-coupled-logic (ECL) interface 4-Mb dynamic RAM (DRAM) with an access time under 10 ns using 0.3-μm technology is explored, and a deep submicrometer BiCMOS VLSI using this technology is proposed. Five aspects of such a DRAM are covered. They are the internal power supply voltage scheme using on-chip voltage limiters, an ECL DRAM address buffer with a reset function and level converter, a current source for address buffers compensated for device parameter fluctuation, an overdrive rewrite amplifier for realizing a fast cycle time, and double-stage current sensing for the main amplifier and output buffer. Using these circuit techniques, an access time of 7.8 ns is expected with a supply current of 198 mA at a 16-ns cycle time

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Solid-State Circuits, IEEE Journal of  (Volume:26 ,  Issue: 11 )