A 20 Gbps PAM4 data transmitter ASIC for particle physics experiments
We present the design and test results of a novel data transmitter ASIC operating up to 20.48 Gbps with 4-level Pulse-Amplitude-Modulation (PAM4) for particle physics experiments. This ASIC, named GBS20, is fabricated in a 65 nm CMOS technology. Two serializers share a 5.12 GHz Phase Locked Loop (PLL) clock. The outputs from the serializers are combined into a PAM4 signal that directly drives a Vertical-Cavity-Surface-Emitting-Laser (VCSEL). The input data channels, each at 1.28 Gbps, are scrambled with an internal 2$$^{7}$$-1 Pseudo-Random Binary Sequence (PRBS), which also serves as a frame aligner. GBS20 is tested to work at 10.24 and 20.48 Gbps with a VCSEL-based Transmitter-Optical-Subassembly (TOSA). The power consumption of GBS20 is below 238 mW and reduced to 164 mW in the low-power mode.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1854767
- Report Number(s):
- FERMILAB-PUB-22-110-PPD; arXiv:2202.03509; oai:inspirehep.net:2029941
- Journal Information:
- JINST, Journal Name: JINST Journal Issue: 03 Vol. 17
- Country of Publication:
- United States
- Language:
- English
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journal | September 2015 |
LOCx2, a low-latency, low-overhead, 2 × 5.12-Gbps transmitter ASIC for the ATLAS Liquid Argon Calorimeter trigger upgrade
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journal | February 2016 |
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