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Rambus claims development of fastest memory bus
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SAN FRANCISCO -- At the International Solid-State Circuits Conference (ISSCC), Rambus Inc. disclosed details about a new 2.2-gigabyte-per-second interface and other techniques that boost memory performance by more than 25% over today's leading-edge technologies. Los Altos, Calif.-based Rambus today said the new developments have resulted in the world's fastest bus technology.

In one of two ISSCC papers, Rambus engineers described a 2.2-Gbyte/sec. signaling interface for main memory that uses a delay-lock loop (DLL) to enable in-system timing calibration with 1.4-degree resolution and output drivers with limited positive feedback to increase voltage margin. This signaling interface has been used to produce prototype chips operating up to 2.6-Gbyte/sec. in standard chip-scale packages (CSPs), according to Rambus.

A second ISSCC paper described a 25% increase in bandwidth from the company's Quad Rambus Signaling Level (QRSL) signaling technology. The new technology pushes QRSL to a transfer rate of 2 Gigabits per second per pin. This technology has been tested in systems representing low-cost consumer products, said the company.






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