Accurate PLL Characterization Using Virtuoso Spectre RF Noise ...
Accurate PLL Characterization Using Virtuoso Spectre RF Noise ... Accurate PLL Characterization Using Virtuoso Spectre RF Noise ...
12 Model Overview • • • • • • Noise-Aware PLL flow supports extraction and modeling of Voltage Controlled Oscillator, Phase/Frequency Detector, Charge Pump, Divider VCO Model supports – Single-ended VCO outputs. – Sensitivity to Tuning Voltage, Positive Power Supply, and Negative Power Supply. Phase/Frequency Detector and Charge Pump – P/FD and CP are merged. . Divider model – Divider noise is not extracted. – The divider is merged into the VCO for faster simulation. Models are single-ended, voltage output levels Two types of models are generated – CMI model will not be editable. – Verilog-A model will be editable and designers will be able to extend the model themselves. September 17, 2007
13 Non-Linear VCO Modeling • • Why do we need nonlinear oscillator models? – – September 17, 2007 Oscillators are fundamentally nonlinear systems. Linear oscillator models often fail to accurately predict oscillation amplitude and phase deviations under perturbations [1]. Nonlinear oscillator models can capture the nonlinear dynamics of oscillators such as injection locking, power supply interference, cycle slipping, …
- Page 1 and 2: INVENTIVE Using Spectre RF Noise-Aw
- Page 3 and 4: 3 • • • Introduction Phase lo
- Page 5 and 6: 5 Challenges of PLL Simulation •
- Page 7 and 8: 7 V R Spectre RF Noise-Aware PLL Si
- Page 9 and 10: 9 PLL Model Extraction Flow • •
- Page 11: 11 September 17, 2007 PLL testbench
- Page 15 and 16: 15 Effect of Noise and Perturbation
- Page 17 and 18: 17 SpectreRF’s PPV-based VCO Mode
- Page 19 and 20: 19 • • • Strengths of Spectre
- Page 21 and 22: 21 Using Spectre RF Noise-Aware PLL
- Page 23 and 24: 23 September 17, 2007 PPV versus tr
- Page 25 and 26: 25 PLL Noise-Aware Flow Experimenta
- Page 27 and 28: 27 Conclusions • • • • Cade
- Page 29 and 30: 29 References • • • • • [
12<br />
Model Overview<br />
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<strong>Noise</strong>-Aware <strong>PLL</strong> flow supports extraction and modeling of Voltage<br />
Controlled Oscillator, Phase/Frequency Detector, Charge Pump, Divider<br />
VCO Model supports<br />
– Single-ended VCO outputs.<br />
– Sensitivity to Tuning Voltage, Positive Power Supply, and Negative<br />
Power Supply.<br />
Phase/Frequency Detector and Charge Pump<br />
– P/FD and CP are merged. .<br />
Divider model<br />
– Divider noise is not extracted.<br />
– The divider is merged into the VCO for faster simulation.<br />
Models are single-ended, voltage output levels<br />
Two types of models are generated<br />
– CMI model will not be editable.<br />
– Verilog-A model will be editable and designers will be able to extend the<br />
model themselves.<br />
September 17, 2007
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