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Setting Up An Analysis<br />

Transient Noise Analysis<br />

The plot of the VCO control node is shown in Figure 6-18 and Figure 6-19 (green<br />

curves). The plot of the PLL output will be used to compute the phase noise spectrum.<br />

Figure 6-19. VCO Control Node - Restarted Transient Noise Analysis<br />

3. The Waveform Calculator in EZwave is used to compute the Phase Noise spectrum<br />

from the transient noise analysis results. The post-processing function<br />

noisetrantophasenoise() (located in the RF functions menu) is applied on the VCO<br />

output waveform V(VCO_OUT) between 6μs and 100μs.<br />

262<br />

Eldo® User's Manual, 15.3

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