ETRI Journal
- 제30권2호
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- Pages.344-346
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- 2008
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- 1225-6463(pISSN)
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- 2233-7326(eISSN)
A Co-design Study of Filters and Oscillator for Low Phase Noise and High Harmonic Rejection
- Zhang, Bing (College of Physics and Electronics, Shanxi University) ;
- Zhang, Wenmei (College of Physics and Electronics, Shanxi University) ;
- Ma, Runbo (College of Physics and Electronics, Shanxi University) ;
- Zhang, Xiaowei (College of Physics and Electronics, Shanxi University) ;
- Mao, Junfa (Department of Electronic Engineering, Shanghai JiaoTong University)
- 투고 : 2007.12.22
- 발행 : 2008.04.30
초록
In this paper, we present a novel oscillator (OSC) design. Bandpass filters, which can suppress harmonics, are incorporated into a co-design with an OSC to improve the OSC phase noise and harmonic rejection. The proposed OSC/bandpass filter co-design achieves a phase noise of -130.1 dBc/Hz/600 kHz and harmonic rejection of 37.94 dB and 40.85 dB for the second and third harmonics, respectively, as compared to results achieved by the OSC before co-design of -101.6 dBc/Hz/600 kHz and 21.28 dB and 19.68 dB. Good agreement between the measured and simulated results is achieved.