The current mode digital-to-analog converter (iDAC) has been widely used in finite-impulse response (FIR) filter implementations as it is well-suited for high-speed operation. This paper proposes a novel solution to reduce the signal feed-through problem commonly encountered in current mode digital-to-analog converters in pre-emphasis circuits. To improve the eye opening, the circuit must be able to limit the flow of feed-through signal to the summing node. The proposed multi-tap pre-emphasis circuit has been simulated using an IBM 130nm CMOS technology.

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Keywords Backplane, Current Mode Digital-to-Analog Converter, Finite impulse response (FIR), iDAC, Pre-emphasis, signal feed-through
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Conference 24th IEEE International System on Chip Conference, SOCC 2011
Tai, H. (Harry), Noel, P. (Peter), & Kwasniewski, T. (2011). A reduced signal feed-through 6-tap pre-emphasis circuit for use in a 10GB/S backplane communications system. Presented at the 24th IEEE International System on Chip Conference, SOCC 2011. doi:10.1109/SOCC.2011.6085130