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Openai/693690ea-2aec-8013-9f10-ddbe2ccd597e
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==== - 28 Gbps PAM-4 β μ¬λ³Ό λ μ΄νΈ 14 Gbaud β UI β 1 / 14 GHz β 71.4 ps ==== * Nyquist β 7 GHz, μ ν¨ λμμ 3μ°¨ κ³ μ‘°νκΉμ§ 보면 20 GHz μ΄λ°κΉμ§ μν₯μ λ°μ΅λλ€. * FR-4(Ξ΅rβ4.3, tanΞ΄β0.02)μμ 15 cm μ λλ©΄ 7β10 GHzμμ λλ΅ μ dB μμ€μ IL + via/컀λ₯ν° μμ€κΉμ§ ν©μ³λ βμ€κ° μ λ μμ€ μ±λβμ΄λΌκ³ λ³Ό μ μλ μμ€μ λλ€. * PAM-4λ λμΌ VOD κΈ°μ€μΌλ‘ eye stepμ΄ 1/3λ‘ μ€μ΄ SNDR μκ΅¬κ° μ»€μ§κΈ° λλ¬Έμ, Eye height 60 mV / BER 10β»ΒΉΒ² μ€νμ λ§μ‘±νλ €λ©΄ λ°μ¬μ ISIκ° μ΅μνλ μ±λμ΄ κΈ°λ³Έ μ μ μ λλ€.AMD<ref>{{cite web|title=AMD|url=https://www.xilinx.com/publications/events/designcon/2016/slides-pam4signalingfor56gserial-zhang-designcon.pdf|publisher=xilinx.com|access-date=2025-12-08}}</ref>
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