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Multi-output VC-TCXO having CMOS inverter for WCDMA(UMTS)  

Jeong Chan-Yong (Mobile RF R&D Group, Samsung Electro-Mechanics Co., Ltd.)
Lee Hai-Young (Department of Electrical Engineering, Ajou University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.43, no.8, 2006 , pp. 6-12 More about this Journal
Abstract
Recently, according to the rapid development of mobile system, the development of relative mobile components has been required, and especially, with the miniaturization of mobile component, the complex with nearby components has been progressed. In this paper, multi-output VC-TCXO (Voltage Controlled-Temperature Compensated Crystal Oscillator) for WCDMA integrates the additional CMOS inverter, so it can be the normal clipped sinewave output and additional CMOS output, and also it can be satisfied the VC-TCXO's requirements for WCDMA system. And the important characteristics of reference oscillator, like phase noise and frequency short term stability, are satisfied with WCDMA(UMTS) system's requirement In this paper, however, 25MHz is used for reference frequency, similarly and practically, we think that it can be used from 10MHz to 40MHz.
Keywords
Multi-output; TCXO; Crystal oscillator; Reference oscillator;
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