V-I converter-based voltage-controlled oscillator with improved linear gain characteristic
- Authors
- Ko, Jaehong; An, Chang-Ho; Kim, Chulwoo; Kim, Soo-Won
- Issue Date
- 23-7월-2015
- Publisher
- INST ENGINEERING TECHNOLOGY-IET
- Citation
- ELECTRONICS LETTERS, v.51, no.15, pp.1211 - 1212
- Indexed
- SCIE
SCOPUS
- Journal Title
- ELECTRONICS LETTERS
- Volume
- 51
- Number
- 15
- Start Page
- 1211
- End Page
- 1212
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/92991
- DOI
- 10.1049/el.2015.1628
- ISSN
- 0013-5194
- Abstract
- 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 (K-VCO) 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, K-VCO is changed from 8.43 to 2.05MHz/mV with a wider V-ctrl 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.
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