A low jitter 50 Gb/s PAM4 optical receiver in 130 nm SiGe BiCMOS

Lu, Shaorong; Xie, Sheng; Mao, Luhong; Song, Ruiliang; Zhang, Naibo

doi:10.1016/j.mejo.2023.105803

Cited by 2 publications

(3 citation statements)

References 12 publications

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“…Then its output is converted to 3-bit thermometer code by three slicers with different thresholds. Finally, the data stream is recovered to NRZ format [19,20,25]. Due to 12 transition patterns, PAM4 signaling makes the ISI and the duty cycle distortion (DCD) more severe compared to NRZ.…”

Section: Jitter Analyses Of Typical Pam4 Receivermentioning

confidence: 99%

“…Different to NRZ format, PAM4 signaling possesses 12 transition patterns, thus resulting in a large DCD jitter [24]. If we assume that all the level transitions of PAM4 have equal probability, the PDF of DCD jitter caused by all level transitions can be expressed by a dual-Dirac function [25]…”

Section: Jitter Analyses Of Typical Pam4 Receivermentioning

confidence: 99%

“…3.1 Proposed PAM4 receiver architecture Based on the above jitter analyses and our previous work [25], a modified architecture for 50 Gb/s PAM4 receiver is proposed, as shown in Fig. 2.…”

Section: Circuit Designmentioning

confidence: 99%

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A 50Gb/s PAM4 receiver with mid-frequency compensation and decision jitter cancellation

Lv,

Xie,

Qin

et al. 2024

IEICE Electron. Express

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Aiming at the jitter issue in four-level pulse amplitude modulation (PAM4) receive link, the key causes related to the non-ideal effects of channel and data decision were analyzed, and a modified PAM4 receiver architecture was proposed. An analog equalizer with extra mid-frequency compensation and 1-tap decision-feedback equalizer were incorporated to minimize the inter-symbol interference. To alleviate the timing constraints in DFE, the feedback loop of slicer was optimized. The post-simulation results based on TSMC 28 nm CMOS process indicate that the proposed 50 Gb/s PAM4 receiver functions well over a channel with 12 dB loss at Nyquist frequency. The peak-to-peak jitters of two restored NRZ signals are 1.5 ps and 2.5 ps, respectively.

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Section: Jitter Analyses Of Typical Pam4 Receivermentioning

confidence: 99%

Section: Jitter Analyses Of Typical Pam4 Receivermentioning

confidence: 99%