Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)
- 2005.11a
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- Pages.841-844
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- 2005
Multi-output VC-TCXO for WCDMA(UMTS)
WCDMA(UMTS)용 다중출력 VC-TCXO
- Jeong, Chan-Yong (SAMSUNG Electro-Mechanics Co., Ltd) ;
- Lee, Hai-Young (Ajou University, Electronics Engineering Department)
- Published : 2005.11.26
Abstract
Multi-output VC-TCXO (Voltage Controlled-Temperature Compensated Crystal Oscillator) for WCDMA has integrated the additional CMOS inverter, so it can be normal clipped sinewave output and additional CMOS output and it can be satisfied the VC-TCXO Characteristics that WCDMA system required. In this paper, however 26MHz is used for reference frequency, similarly and practically, it is usable from 10MHz to 40MHz, Most important factor to integrate CMOS inverter internally is the isolation between normal output and additional output. For this, it is separated in package design, due to this, when it isn't used additional output, it shows the same electrical performance, when it is used additional output, it has minimum-rized the interference. and then the important characteristics in reference oscillator are met to WCDMA system's requirements, like phase noise and frequency short term stability.
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