A New Active Inductor and Its Application to Wide Tuning Range LC Oscillator
Mahdi Ebrahimzadeh1, Farzan Rezaei2, Siavash Rezaei3
1Mahdi Ebrahimzadeh, Department of Electrical Engineering, Electronics Research Center, Iran University of Science and Technology, Tehran, Iran.
2Farzan Rezaei, Department of Electrical Engineering, Electronics Research Center, Iran University of Science and Technology, Tehran, Iran.
2Siavash Rezaei, Department of Computer Engineering, Sharif University of Technology, Tehran, Iran.
Manuscript received on October 04, 2011. | Revised Manuscript received on October 19, 2011. | Manuscript published on November 05, 2011. | PP: 111-114 | Volume-1 Issue-5, November 2011. | Retrieval Number: E0162081511/2011©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: This paper presents a new structure to reduce noise in an active inductor. Our structure is based on a local common mode feedback. The proposed active inductor is used for implementation a wide tunable low phase noise LC oscillator. By varying control voltage of active inductor from 0.85 V to 1.6 V, the oscillation frequency changes from 86 MHz to 1.137 GHz. The presented structure improves the value of phase noise in the oscillator based on it about 5.5 dBc/Hz in 1 MHz offset frequency. The proposed oscillator is simulated with TSMC 0.18 µm CMOS technology.
Keywords: Active Inductor, High Quality Factor, LC Oscillator, Wide Tuning Range, Phase Noise.