 技術摘要 / Our Technology： |
本發明揭露一種應用雜訊濾波技巧的非整數頻率合成器及其操作方法。本發明之非整數頻率合成器主要包含一濾波器、一頻率校正迴路、一相位校正迴路以及一數位控制延遲線。濾波器接收第一除頻信號並產生濾波信號。頻率校正迴路,耦接至濾波器,並產生第一控制訊號。相位校正迴路,耦接至濾波器以及頻率校正迴路,並產生第二控制訊號。數位控制延遲線,耦接至相位校正迴路並接收第二控制訊號。如此,非整數頻率合成器的量化雜訊將可被降低,使非整數頻率合成器的相位雜訊能獲得改善,且訊號經由濾波器輸出後,系統仍保持鎖定。
The present invention discloses a noise filtering fractional-n frequency synthesizer and an operating method thereof. The noise filtering fractional-n frequency synthesizer comprises a filter, a frequency calibration loop, a phase calibration loop and a digitally controlled delay line. The filter receives a first frequency division signal and generates a filtered signal. The frequency calibration loop is coupled to the filter and generates a first control signal. The phase calibration loop is coupled to the filter and the frequency calibration loop, and generates a second control signal. The digitally controlled delay line is coupled to the phase calibration loop and receives the second control signal. Thus, quantization noise of the fractional-n frequency synthesizer can be reduced, and phase noise of the fractional-n frequency synthesizer can be improved. In addition, the system remains locked after the filter outputs the signal.
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| 專利簡述 / Intellectual Properties： |
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聯繫方式 / Contact： |
| 臺大產學合作總中心 / Center of Industry-Academia Collaboration, NTU |
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| Email：ordiac@ntu.edu.tw |
電話/Tel：02-3366-9945 |
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專利行銷平台