A New Dual-Frequency LC oscillator: Analysis and Design
Subject Areas : Majlesi Journal of Telecommunication Devices
Habib Adrang
1
(Department of Electrical Engineering, Nour Branch, Islamic Azad University, Nour, Iran)
Seyed Saleh Ghoreishi
2
(Department of Electrical Engineering, Nour Branch, Islamic Azad University, Nour, Iran)
Keywords: en,
Abstract :
In this paper, a new dual-frequency LC oscillator is introduced. This new architecture is designed taking the advantage of a Wheatstone-bridge LC resonator concept that enables the oscillator to generate two different frequencies simultaneously. In contrast to previous designs, no transistor switches are incorporated in the structure of this dual-frequency circuit. So, the proposed configuration is suitable for low phase noise applications. The performance of the oscillator has been verified using circuit simulations in 0.18 µm CMOS technology. Circuit simulations show phase noises of -109 dBc/Hz and -105 dBc/Hz for 1.8 GHz and 2.7 GHz frequency bands respectively in 100 kHz offset frequency.
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