A 4-Channel 6.25-Gb/s/ch VCSEL driver for HDMI 2.0 active optical cables

Chaerin Hong, Sung Min Park

Research output: Contribution to journalArticlepeer-review

Abstract

This paper presents a 4-channel commoncathode VCSEL driver array operating up to 6.25 Gb/s per channel for the applications of HDMI 2.0 active optical cables. The proposed VCSEL driver consists of an input buffer, a modified Cherry-Hooper amplifier as a pre-driver, and a main driver with preemphasis to drive a common-cathode VCSEL diode at high-speed full switching operations. Particularly, the input buffer merges a linear equalizer not only to broaden the bandwidth, but to reduce power consumption simultaneously. Measured results of the proposed 4-channel VCSEL driver array implemented in a 0.13-μm CMOS process demonstrate wide and clean eye-diagrams for up to 6.25-Gb/s operation speed with the bias current 2.0 mA and the modulation currents of 3.1 mAPP. Chip core occupies the area of 0.15 x 0.1 μm2 and dissipate 22.8 mW per channel.

Original languageEnglish
Pages (from-to)561-567
Number of pages7
JournalJournal of Semiconductor Technology and Science
Volume17
Issue number4
DOIs
StatePublished - Aug 2017

Keywords

  • AOC
  • Cherry-hooper
  • CMOS
  • Driver
  • HDMI
  • VCSEL

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