Design of PAM4 modulation circuit with 2-tap pre-emphasis for millimeter-wave application

Sheng Xie; Zhujun Xue; Ruiliang Song; Luhong Mao; Naibo Zhang; Kaixue Ma

doi:10.1117/12.2661743

12 April 2023 Design of PAM4 modulation circuit with 2-tap pre-emphasis for millimeter-wave application

Sheng Xie, Zhujun Xue, Ruiliang Song, Luhong Mao, Naibo Zhang, Kaixue Ma

Author Affiliations +

Proceedings Volume 12565, Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022); 125650W (2023) https://doi.org/10.1117/12.2661743
Event: Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022), 2022, Shanghai, China

Abstract

Millimeter-wave (mmWave) technology has been employed in many applications due to abundant bandwidth resources and high interference immunity such as telecommunication, automotive radars, and imaging. In this paper, a mmWave transmitter link incorporating PAM4 modulation, resonant tunneling diode (RTD) based oscillator, power amplifier and antenna was proposed. To achieve good linearity and alleviate inter-symbol interference (ISI) caused by channel loss simultaneously, a PAM4 modulation circuit utilizing voltage mode driver and 2-tap pre-emphasis was designed and optimized in TSMC 28 nm CMOS process. The simulation results show that our PAM4 modulation circuit operates properly at 40Gb/s with a differential output swing of up to 800 mVpp under a supply voltage of 0.9 V. The overall power consumption is about 51.3 mW, corresponding to an energy efficiency of 1.28 pJ/bit.

Citation Download Citation

Sheng Xie, Zhujun Xue, Ruiliang Song, Luhong Mao, Naibo Zhang, and Kaixue Ma "Design of PAM4 modulation circuit with 2-tap pre-emphasis for millimeter-wave application", Proc. SPIE 12565, Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022), 125650W (12 April 2023); https://doi.org/10.1117/12.2661743

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KEYWORDS

Modulation

Resistance

Energy efficiency

Transmitters

Device simulation

Eye

Signal attenuation

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