3.3-mA 2.8-GHz bufferless LC oscillator directly driving a 10-mm on-chip clock distribution line

Masahiro Ichihashi, Shogo Harada, Haruichi Kanaya

Research output: Contribution to journalArticle


A bufferless LC oscillator can potentially offer an attractive solution for low-power, high-speed clock distribution due to the absence of repeaters on the clock distribution line and utilization of LC resonance. However, conventional bufferless LC oscillators suffer from a fundamental tradeoff between the frequency and power consumption due to their high-frequency sensitivity. In this paper, we have introduced a low-frequency sensitivity bufferless LC oscillator that is directly connected to a 10-mm on-chip clock distribution line in the TSMC 0.18-µm 1-Poly 6-Metal CMOS technology. The core area of the LC oscillator is only 270 × 280 µm2. The measurement results show that a 2.8-GHz oscillation frequency, 3.3-mA current consumption, and −112.8 dBc/Hz phase noise at 1 MHz offset can be achieved.

Original languageEnglish
Article number20190301
JournalIEICE Electronics Express
Issue number16
Publication statusPublished - Jan 1 2019


All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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