 技術摘要 / Our Technology： |
本發明的一實施例為一種全數位展頻時脈產生器，利用一時間放大器將接收到的相位差放大後再透過一相位判斷單元進行相位判斷，以避免相位差太小落在相位判斷單元的無輸入範圍（deadzone，又稱死區）時，造成相位判斷單元的判斷錯誤。此外利用一三角積分調變器來增加全數位展頻時脈產生器中的數位控制振盪器的解析度。
An embodiment of the invention relates to an all-digital spread spectrum clock generator comprising a phase detector, a time-to-digital converting unit, a digital loop filter, a delta-sigma modulator and a digital controlled oscillator. The phase detector receives a reference signal and a clock feedback signal to output first and second difference signals. The time-to-digital converting unit comprises timing amplifier to receive and amply the first and second difference signals to generate digital data. The digital loop filter receives and accumulates digital data to output first and second digital data. The delta-sigma modulator receives the second digital data to generate a resolution tuning word. The digital controlled oscillator adjusts its frequency of output clock signal according to the first difference signal, the second difference signal and the first digital data, and adjusts a resolution of the digital controlled oscillator according to the resolution tuning word.
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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