A 32 Gb/s, 4.7 pJ/bit Optical Link With −11.7 dBm Sensitivity in 14-nm FinFET CMOS
| Autor: | Seongwon Kim, Jonathan E. Proesel, Sungjae Lee, Timothy O. Dickson, John F. Bulzacchelli, Mounir Meghelli, Zeynep Toprak-Deniz, Ilter Ozkaya, Herschel A. Ainspan, Alessandro Cevrero, Sergey V. Rylov, Daniel M. Kuchta |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
Transimpedance amplifier business.industry Optical link 020208 electrical & electronic engineering 02 engineering and technology Optical modulation amplitude Chip 020210 optoelectronics & photonics CMOS 0202 electrical engineering electronic engineering information engineering Bit error rate Optoelectronics Electrical and Electronic Engineering business Link margin Adaptive optics |
| Zdroj: | IEEE Journal of Solid-State Circuits. 53:1214-1226 |
| ISSN: | 1558-173X 0018-9200 |
| Popis: | This paper presents a 32 Gb/s non-return-to-zero optical link using 850-nm vertical-cavity surface-emitting laser-based multi-mode optics with 14-nm bulk FinFET CMOS circuits. The target application is the integration of optics on to the first-level package, connecting high-speed optical I/O directly to an advanced CMOS host chip (e.g., processor and switch) to increase package I/O bandwidth density and lower overall system power and cost. The optical link is designed for maximum link margin to tolerate high optical losses created by low-cost optical packaging. The transmitter (TX) uses a three-tap, 1/2-unit-interval-spaced feed-forward equalizer to improve eye opening. The receiver (RX) uses a low-bandwidth, low-noise transimpedance amplifier and a speculative one-tap decision-feedback equalizer for high sensitivity. The TX and RX power efficiencies are 3.3 and 1.4 pJ/bit, respectively. The TX optical modulation amplitude (OMA) is 1.2 dBm, and the RX sensitivity is −11.7 dBm OMA at a bit error rate of 10−12 with PRBS31 data, providing 12.9-dB link margin. |
| Databáze: | OpenAIRE |
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