Abstract
A duo-binary signaling has been applied to both transmitter and receiver for high-speed low-power DRAM interface. The transmitter consists of a half-rate voltage-mode time-interleaved mixing duo-binary driver and a 2-tap feed-forward equalizer. The voltage-mode driver is used in this brief, because it generates more linear output voltage than the current-mode driver for the duo-binary signaling at low supply voltage. A time-based receiver is used for high-speed operation at low supply voltage. A 1-tap look-ahead decision-feedback equalizer scheme was applied to the time-based receiver for the duo-binary decoding operation. The test chip fabricated in a 28 nm low-power CMOS process gives the energy efficiency of 0.41 pJ/b at 12 Gb/s with a 25 cm-long FR-4 micro-strip line and the supply voltage of 0.75V.
Published Version
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