Area-Effective Inductive Peaking with Interwoven Inductor for High-Speed Laser-Diode Driver for Optical Communication System

DOI HANDLE Web Site 14 References Open Access
  • KUBOKI Takeshi
    Department of Communications and Computer Engineering, Kyoto University
  • OHTOMO Yusuke
    NTT Microsystem Integration Laboratories, NTT Corporation
  • TSUCHIYA Akira
    Department of Communications and Computer Engineering, Kyoto University
  • KISHINE Keiji
    Department of Electronic Systems Engineering, The University of Shiga Prefecture
  • ONODERA Hidetoshi
    Department of Communications and Computer Engineering, Kyoto University

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Abstract

This paper presents an area-effective bandwidth enhancement technique using interwoven inductors. Inductive peaking is a common practice for bandwidth enhancement, however the area overhead of inductors is a serious issue. We implement six or four inductors into an interwoven inductor. Furthermore parasitics of the inductors can be reduced. The proposed inductor is applied to a laser-diode driver in a 0.18µm CMOS. Compared to conventional shunt-peaking, the proposed circuit achieves 1.6 times faster operation and 60% reduction in power consumption under the condition for the same amount of data transmission and the LD driving current. The interwoven inductor can reduce the circuit area by 26%. Parasitic capacitance in interwoven inductor is discussed. Simulation results reveal that line-to-line capacitance is a significant factor on bandwidth degradation.

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