Work

Design of a 25 Gbps CTLE based on adjustable mid-frequency equalization and wide-bandwidth binaural negative capacitor

Year: 2025

Type: article

Abstract: In order to improve the signal quality in the RX (receiver), a 25 Gbps continuous-time linear equalizer (CTLE) based on 55 nm process design is proposed. The proposed circuit adds a pair of zero and pole that can modulate mid-frequency equalization, and it includes a new binaural structure negative capacitance circuit that can achieve a wider bandwidth compared to the traditional CTLE. The simulation results show that, when the 25 Gb/s NRZ signal is transmitted through the 35 cm FR4 PCB trace, the proposed circuit can compensate for a channel loss of 13 dB at the Nyquist frequency, the eye diagram opens up significantly with 0.95 UI eye width and 1.1 V voltage swing.

Source: IEICE Electronics Express

DOI: 10.1587/elex.22.20240710

Authors: Rui Hua, Jianhua Zhang, Aiying Guo

Institution: Shanghai University

Language: English

Topic: Advancements in PLL and VCO Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: diamond

Funder: National Natural Science Foundation of China

Award: G1418901231