Analysis and Design of a DC-12-GHz Distribution Power Amplifier for Quantum Key Distribution Application

Zhu, Xiaorui; Qian, Yihan; Peng, Zhixiang; Liang, Yimin; Diao, Shengxi

doi:10.1109/tvlsi.2022.3180503

Cited by 5 publications

(2 citation statements)

References 31 publications

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“…Compared to the most similar circuit [15], the coupled inductors allow a 57% reduction in silicon area. Although [4]− [8] used the single-ended topology, they have a larger core area than this work. The developed amplifier has a small power consumption of 75 mW at the cost of the gain.…”

Section: Measurement and Discussionmentioning

confidence: 99%

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A Compact Fully-Differential Distributed Amplifier with Coupled Inductors in 0.18-µm CMOS Technology

Kawahara

UMEDA

TAKANO

et al. 2023

IEICE Trans. Electron.

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This paper presents a compact fully-differential distributed amplifier using a coupled inductor. Differential distributed amplifiers are widely required in optical communication systems. Most of the distributed amplifiers reported in the past are single-ended or pseudo-differential topologies. In addition, the differential distributed amplifiers require many inductors, which increases the silicon cost. In this study, we use differentially coupled inductors to reduce the chip area to less than half and eliminate the difficulties in layout design. The challenge in using coupled inductors is the capacitive parasitic coupling that degrades the flatness of frequency response. To address this challenge, the odd-mode image parameters of a differential artificial transmission line are derived using a simple loss-less model. Based on the analytical results, we optimize the dimensions of the inductor with the gradient descent algorithm to achieve accurate impedance matching and phase matching. The amplifier was fabricated in 0.18-μm CMOS technology. The core area of the amplifier is 0.27 mm 2 , which is 57% smaller than the previous work. Besides, we demonstrated a small group delay variation of ±2.7 ps thanks to the optimization. the amplifier successfully performed 30-Gbps NRZ and PAM4 transmissions with superior jitter performance. The proposed technique will promote the highdensity integration of differential traveling wave devices.

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Section: Measurement and Discussionmentioning

confidence: 99%

“…Some distributed modulator drivers reached bandwidths of nearly 100 GHz [1]− [3]. Recently, distributed drivers were also developed for quantum key transfer systems [4]. Another application of distributed amplifiers is frequency interleaving.…”

Section: Introductionmentioning

confidence: 99%