Wideband injection-locked frequency divider based on a process and temperature compensated ring oscillator

Academic Article


  • The authors propose a ring-based injection-locked frequency divider (ILFD) incorporating a novel process and temperature compensation technique. The core of the ILFD consists of a process and temperature compensated ring oscillator based on modified symmetric load delay elements. Measurement results show that the natural frequency of oscillation of the ring oscillator varies only 4.4 across six different chips and for a temperature range of 0-80°C. The ILFD possesses a wide locking range over process corners as well as a wide temperature range because of the proposed compensation technique and the incorporation of the delay cell architecture in the design. A calibration circuitry can be used to further enhance the locking range. Measurement results show that the proposed ILFD functions as a divide-by-4 for an input frequency range of 1.8-3.2GHz for an input power level as low as -3dBm. The worst-case power consumption was approximately 2mW from a 1.8V power supply. The proposed ILFD can be used as a low-power prescaler for multi-band applications. © 2009 The Institution of Engineering and Technology.
  • Authors

    Published In

    Digital Object Identifier (doi)

    Author List

  • Vijayaraghavan R; Islam SK; Haider MR; Zuo L
  • Start Page

  • 259
  • End Page

  • 267
  • Volume

  • 3
  • Issue

  • 5