A 20 Gbps PAM4 data transmitter ASIC for particle physics experiments

Zhang, L.; Cruda, E.; Chao, C-P.; Chen, S-W.; Deng, Bangming; Francisco, R.; Gong, D. T.; Guo, D.; Hou, S.; Huang, Guanming; Huang, X.; S., Kulis,; Li, C.-Y.; Liu, C.; Liu, E.R.; Liu, T.; Moreira, P.; Prinzie, J.; Sun, H.; Sun, Quan; Sun, X.; Wong, G.; Yang, Dongxu; Ye, J.; Zhang, W.

doi:10.1088/1748-0221/17/03/c03011

Cited by 4 publications

(8 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Detector data transmission (WG6) is among the topics and a goal of 56 Gbps per fiber using 28 nm CMOS technology and PAM4 is in discussion. In the US there has been R&D work to build on the lpGBT design with a PAM4 scheme to reach 20.48 Gbps per fiber [28]. The test chip GBS20 uses two of the lpGBT serializer design blocks with the shared PLL (also from lpGBT) following the scheme in the ASIC LOCx2 in ATLAS LAr trigger upgrade [11].…”

Section: Proposed Randdmentioning

confidence: 99%

“…The test chip GBS20 uses two of the lpGBT serializer design blocks with the shared PLL (also from lpGBT) following the scheme in the ASIC LOCx2 in ATLAS LAr trigger upgrade [11]. A complete optical transmitter GBT20 has also been prototyped to demonstrate the transmission of 20.48 Gbps in one fiber through VCSEL [28]. As a near term goal the R&D on ASIC and optical transmitter is aimed to double the current transmission speed.…”

Section: Proposed Randdmentioning

confidence: 99%

“…This trend will continue. R&D work has already been reported in TWEPP [29] in both LC (single channel) and MT (array optics) optical connector formats. While exploring other technology such as si-photonics is forward looking, before a concrete prototype for HEP application is demonstrated, the direct-driving VCSEL based optical module development needs to be the mainstream.…”

Section: Optical Module Developmentsmentioning

confidence: 99%

See 2 more Smart Citations

Fast (optical) Links

Newcomer¹,

Ye²,

Paramonov³

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

In this write-up we focus on fast data links that read out particle detectors. This includes developments of ASICs, optical modules, identifying passive components such as fiber and connector, and a link system design. A review of the current status is provided. The goal of R&D is to double (near term) and quadruple (longer term) the present data transmission rate for particle detectors, enabling a wide range of physics exploration and measurements.

show abstract

Section: Proposed Randdmentioning

confidence: 99%

Section: Proposed Randdmentioning

confidence: 99%

Section: Optical Module Developmentsmentioning

confidence: 99%

See 1 more Smart Citation

Fast (optical) Links

Newcomer¹,

Ye²,

Paramonov³

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…Future particle-physics experiments have a great demand for high-bandwidth and high-reliability optical links [6]. Based on a radiationtolerant PAM4 (4-level Pulse-Amplitude-Modulation) ASIC GBS20 [7], a transmitter optical module called the Giga-Bit Transmitter at 20 Gbps (GBT20) is designed for optical links in particle-physics experiments.…”

Section: Introductionmentioning

confidence: 99%

GBT20, a 20.48 Gbps PAM4 optical transmitter module for particle physics experiments

et al. 2023

Self Cite

View full text Add to dashboard Cite

We present a pluggable radiation-tolerant 4-level Pulse-Amplitude-Modulation (PAM4) optical transmitter module called GBT20 (Giga-Bit Transmitter at 20 Gbps) for particle-physics experiments. GBT20 has an OSFP or firefly connector to input 16 bit data each at 1.28 Gbps. The GBT20 drives a VCSEL die with an LC lens or a VCSEL TOSA and interfaces an optical fiber with a standard LC connector. The minimum module, including the host connector, occupies 41 mm × 13 mm × 6 mm. At 20.48 Gbps, the minimum Transmitter Dispersion Eye Closure Quaternary (TDECQ) is around 0.7 dB. The power consumption is around 164 mW in the low-power mode. The SEE cross-section is below 7.5 × 10−14 cm2. No significant performance degrades after a TID of 5.4 kGy.

show abstract

“…In high-energy physics (HEP) experiments, the data transmission rate from the detector to the back-end stages is increasing [1][2][3][4]. In this field, 4-level pulse-amplitude-modulation (PAM4) is a commonly used data modulation scheme [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Design and verification of DFE re-decision algorithm for PAM6 high-speed transceiver based on FPGA

Zou,

Song,

Zhu

et al. 2023

J. Inst.

View full text Add to dashboard Cite

In this paper, a decision feedback equalizer (DFE) re-decision algorithm for a 6-level pulse-amplitude-modulation (PAM6) high-speed transceiver is proposed. PAM6 is a two-dimensional (2D) modulation. The four outer points are not used in the 2D constellation diagram to reduce the output power. Although the four outer points will not be modulated, they may be encountered during demodulation. This paper considers the above situation and theoretically analyzes the DFE module under the additive white Gaussian noise (AWGN) channel. Compared with the traditional pipelined DFE structure, the proposed algorithm can help solve the four outer points in PAM6. A serializer/deserializer (SerDes) simulation system is built based on a field programmable gate array (FPGA), and the performance of the proposed algorithm is carried out on the simulation system. According to this proposed algorithm, the symbol error rate (SER) of the PAM6 SerDes system can be reduced, and the system performance can be improved. When the DFE tap coefficient is 0.50 and the signal-to-noise ratio (SNR) is 22.0 dB, the proposed algorithm can additionally correct 8.18 % of erroneous symbols. When the DFE tap coefficient is 1.00 and the SNR is 22.0 dB, the proposed algorithm can additionally correct 17.30 % of erroneous symbols.

show abstract

A 20 Gbps PAM4 data transmitter ASIC for particle physics experiments

Cited by 4 publications

References 2 publications

Fast (optical) Links

Fast (optical) Links

GBT20, a 20.48 Gbps PAM4 optical transmitter module for particle physics experiments

Design and verification of DFE re-decision algorithm for PAM6 high-speed transceiver based on FPGA

Contact Info

Product

Resources

About