A 12.5-Gb/s Near-Ground Transceiver Employing a MaxEye Algorithm-Based Adaptation Technique

作者：Jin Jahoon; Kim Seok; Jin Xuefan; Kim Sang Hoon; Chun Jung Hoon^*

来源：IEEE Transactions on Very Large Scale Integration (VLSI) Systems, 2018, 26(3): 522-530.

DOI：10.1109/TVLSI.2017.2773642

• AC-coupled equalization (EQ)
• adaptive equalization
• dual-loop clock and data recovery (CDR)
• finite-impulse response (FIR)
• high-speed interface
• intersymbol interference (ISI)
• near ground
• timing margin
• transceiver
• voltage mode

A 12.5-Gb/s complete near-ground transceiver is demonstrated. The output stage of the transmitter (TX) employs 2-tap finite-impulse response equalization (EQ) and also performs ac-coupled EQ for an additional EQ. A continuous-time linear equalizer (CTLE) on the receiver (RX) side compensates for the channel attenuation. Based on the maximum eye algorithm, the peaking gain of CTLE is adaptively controlled to track a time-variant environment, such as PVT variations. Each TX and RX is implemented with clocking circuits: a differential PLL, and a dual-loop clock and data recovery circuit. The proposed transceiver is fabricated in a 45-nm CMOS process, and the entire TX and RX, respectively, consume 92 and 138 mW under a 1.2-V supply while operating at 12.5 Gb/s.

• 出版日期2018-3