A Co-design Study of Filters and Oscillator for Low Phase Noise and High Harmonic Rejection

ETRI Journal

关键词: harmonic rejection;    phase noise;    bandpass filter;    oscillator;    Co-design;   

Others  :  1185711
DOI  :  10.4218/etrij.08.0207.0292

【 摘 要 】

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.

   

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