Sang-ki Lee
Newbie level 5
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- Jun 21, 2013
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I'm fresh designer for PLL.
I want to simulate 'PLL Noise PSD' on transient simulation.
I had been using Analog design environment -> results -> direct plot -> main form.
but I couldn't see funtion of 'PLL Noise PSD'.
When I tried to plot 'PLL noise PSD' on transient analysis, the direct plot window shows the message "The PLL Noise PSD data is not available ...".
In spectre output log, I found the error message - "Error found by spectre. ERROR : PSD can not be calculated for lacking the instance called 'vco_freq' for period measurement! "
If anybody knows how to simulate 'PLL noise PSD' on transient simulation, plz tell me about the method step by step.
I want to simulate 'PLL Noise PSD' on transient simulation.
I had been using Analog design environment -> results -> direct plot -> main form.
but I couldn't see funtion of 'PLL Noise PSD'.
When I tried to plot 'PLL noise PSD' on transient analysis, the direct plot window shows the message "The PLL Noise PSD data is not available ...".
In spectre output log, I found the error message - "Error found by spectre. ERROR : PSD can not be calculated for lacking the instance called 'vco_freq' for period measurement! "
If anybody knows how to simulate 'PLL noise PSD' on transient simulation, plz tell me about the method step by step.