A 0.002-mm(2) 6.4-mW 10-Gb/s Full-Rate Direct DFE Receiver With 59.6% Horizontal Eye Opening Under 23.3-dB Channel Loss at Nyquist Frequency

作者：Chen, Yong^*; Mak, Pui-In; Zhang, Li; Wang, Yan

来源：IEEE Transactions on Microwave Theory and Techniques, 2014, 62(12): 3107-3117.

DOI：10.1109/TMTT.2014.2360697

• Active inductor (AI)
• analog one-tap nonreturn-to-zero (NRZ) feedback
• bathtub curve
• bit error rate (BER)
• channel loss
• clocked-one-tap return-to-zero (RZ) feedback
• CMOS
• decision feedback equalization (DFE) receiver
• horizontal eye opening
• pseudorandom binary sequence (PRBS)
• vertical eye opening

This paper reports a full-rate direct decision-feedback-equalization (DFE) receiver with circuit techniques to widen the data eye opening with competitive power and area efficiencies. Specifically, a current-reuse active-inductor (AI) linear equalizer is merged into a clocked-one-tap DFE core for joint-elimination of pre-cursor and long-tail post-cursors. Unlike the passive-inductor designs that are bulky and untunable, the AI linear equalizer offers orthogonally tunable low-and high-frequency de-emphasis. The clocked-one-tap DFE resolves the first post-cursor via return-to-zero feedback data patterns for sharper data transition (i.e., horizontal eye opening), and is followed by a D-flip-flop slicer to maximize the data height (i.e., vertical eye opening). A 10-Gb/s DFE receiver was fabricated in 65-nm CMOS. Measured over an 84-cm printed circuit board differential trace with 23.3-dB channel loss at Nyquist frequency (5 GHz), the achieved figure-of-merit is 0.027 pJ/bit/dB (power consumption/date rate/channel loss). At 10(-12) bit error rate under 2(7) - 1 pseudorandom binary sequence, the horizontal and vertical eye opening are 59.6% and 189.3 mV, respectively. The die size is 0.002 mm(2).

• 出版日期2014-12
• 单位清华大学; 澳门大学