ice:servo-opls
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ice:servo-opls [2019/11/18 23:30] – [Calculating Phase Noise] Michael Radunsky | ice:servo-opls [2019/11/18 23:33] – [Understanding the Transfer Function] Michael Radunsky | ||
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- | The charge pump in the OPLS outputs a signal proportional to the phase-error and the transfer function is as shown in <imgref xferfunc> | + | The charge pump in the OPLS outputs a signal proportional to the phase-error and the transfer function is as shown in <imgref xferfunc> |
=====Calculating Phase Noise ===== | =====Calculating Phase Noise ===== | ||
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The phase-noise specified in Section 1.3 is referenced to the phase frequency detector (PFD) at 1 Hz. To convert that to the noise measured on the actual beat-note, it must be rescaled with the following formula: | The phase-noise specified in Section 1.3 is referenced to the phase frequency detector (PFD) at 1 Hz. To convert that to the noise measured on the actual beat-note, it must be rescaled with the following formula: | ||
- | <WRAP center round box 450px> **D2-135 Phase-Noise Floor = -213 + 20Log(N) + 10Log(F< | + | <WRAP center round box 450px> **D2-135 Phase-Noise Floor = -213 + 20Log(N) + 10Log(ƒ< |
- | where N is the value of the divider and F< | + | where N is the value of the divider and ƒ< |
ice/servo-opls.txt · Last modified: 2021/08/26 15:26 by 127.0.0.1