LTspice : LTspice/SwitcherCAD III
This group is dedicated for LTspice. will get lot of information here. As well help.
This group is dedicated for LTspice. will get lot of information here. As well help.
my fundamental null circuit could help for single tone - just take the RMS of the residual
http://www.diyaudio.com/forums/software-tools/101810-spice-simulation-37.html#post1333137
for an oscillator circuit you will need a very large ncycles number for any high Q oscillator sim to startup, stabilize
set the plot limits to the last cycle and use the <ctrl>, left click the trace lable in the waveform viewer
or add a .meas directive to print the result in the error log
noise in spice requires added sources in a .TRAN sim
http://www.diyaudio.com/forums/software-tools/101810-spice-simulation-37.html#post1333137
for an oscillator circuit you will need a very large ncycles number for any high Q oscillator sim to startup, stabilize
set the plot limits to the last cycle and use the <ctrl>, left click the trace lable in the waveform viewer
or add a .meas directive to print the result in the error log
noise in spice requires added sources in a .TRAN sim
@Aucosticraft : Thanks
@JCX: Very nice null circuit
Do you mean .Tran does not add N-Sources to passive and active components while simulation. Do I need to add N-Sources to each and every component during .TRAN simulation ? What if active component have noise source in their spice model like LME49860 ?
@JCX: Very nice null circuit
Do you mean .Tran does not add N-Sources to passive and active components while simulation. Do I need to add N-Sources to each and every component during .TRAN simulation ? What if active component have noise source in their spice model like LME49860 ?
I don't use noise analysis in spice, not an expert in that use - the doc claims .NOISE is an AC analysis
for .TRAN I'm pretty certain you have to add your own noise modeling sources
for xtal osc noise sim is going to be "interesting" close in noise requires millions of cycles to evaluate, the measured noise has multiple slopes, unmodeled thermal and acceleration effects become significant
for .TRAN I'm pretty certain you have to add your own noise modeling sources
for xtal osc noise sim is going to be "interesting" close in noise requires millions of cycles to evaluate, the measured noise has multiple slopes, unmodeled thermal and acceleration effects become significant
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