V-I converter-based voltage-controlled oscillator with improved linear gain characteristic

Jaehong Ko, Chang Ho An, Chulwoo Kim, Soo Won Kim

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


A voltage-current (V-I) converter-based voltage-controlled oscillator (VCO) is adapted to generate multiple-phase clocks for clock and data recovery for a display driver IC. The proposed V-I converter changed the second-order current equation of the VCO to a first-order current equation of the VCO, to achieve a wide operating frequency range, a linear gain (KVCO) within a wide control voltage, low power, and a small area without any extra circuits, such as a low-to-full amplifier. Owing to the V-I converter, KVCO is changed from 8.43 to 2.05 MHz/mV with a wider Vctrl range, and its tuning range is changed from 114 to 452 MHz with a linear gain characteristic. The proposed VCO is implemented in a 1P6M 1.8 V technology and is suitable for the phase-locked loop used in flat-panel display interfaces that operate from 0.3 to 2 Gbit/s.

Original languageEnglish
Pages (from-to)1211-1212
Number of pages2
JournalElectronics Letters
Issue number15
Publication statusPublished - 2015 Jul 23

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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