The design of an analog frontend including a receiver amplifier (RX) and laser diode driver (LDD) for optical communication system is described. The RX consists of a transimpedance amplifier, a limiting amplifier, and an output buffer (BUF). An offset compensation and common-mode control circuit is designed using switched-capacitor technique to save chip area, provides continuous reduction of the offset in the RX. Active-peaking methods are used to enhance the bandwidth and gain. The very low gate-oxide breakdown voltage of transistors in deep sub-micron technologies is overcome in the LDD by implementing a topology which has the amplifier placed in a floating well. It comprises a level shifter, a pre-amplifier, and the driver stage. The single-chip frontend, fabricated in a 28 nm bulk-digital complementary metal–oxide–semiconductor (CMOS) process has a total active area of 0.003 mm² , is among the smallest optical frontends. Without the BUF, which consumes 8 mW from a separate supply, the RX power consumption is 21 mW, while the LDD consumes 32 mW. Small-signal gain and bandwidth are measured. A photo diode and laser diode are bonded to the chip on a test-printed circuit board. Electro-optical measurements show an error-free detection with a bit error rate of 10⁻¹² at 20 Gbit/s of the RX at and a 25 Gbit/s transmission of the LDD.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:70657 |
| Date | 29 May 2020 |
| Creators | Szilàgyi, Làszlò, Belfiore, Guido, Henker, Ronny, Ellinger, Frank |
| Publisher | Cambridge University Press |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, doc-type:article, info:eu-repo/semantics/article, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 1759-0787, 1759-0795, 10.1017/S1759078717000472, info:eu-repo/grantAgreement/Deutsche Forschungsgemeinschaft/SFB 912/164481002//Highly Adaptive Energy-Efficient Computing/HAEC, info:eu-repo/grantAgreement/European Commission/FP7 | SP1 | ICT/619197//Adaptive Data and Power Aware Transceivers for Optical Communications/ADDAPT |
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