What does actually the “unravel branch wrap” option do to the phase plot in LTspice?
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Below two Bode plots are identical just that in the second one the option "unravel branch wrap" is unticked for the phase plot:
What does this option do to the phase plot?
ltspice phase bode-plot
asked Nov 26 at 9:49
user16307
4,8242396186
add a comment |
up vote
4
down vote
favorite
Below two Bode plots are identical just that in the second one the option "unravel branch wrap" is unticked for the phase plot:
What does this option do to the phase plot?
ltspice phase bode-plot
asked Nov 26 at 9:49
user16307
4,8242396186
Note that +180° == -180°.
– Jonathon Reinhart
Nov 26 at 15:39
add a comment |
up vote
4
down vote
favorite
up vote
4
down vote
favorite
Below two Bode plots are identical just that in the second one the option "unravel branch wrap" is unticked for the phase plot:
What does this option do to the phase plot?
ltspice phase bode-plot
asked Nov 26 at 9:49
user16307
4,8242396186
Below two Bode plots are identical just that in the second one the option "unravel branch wrap" is unticked for the phase plot:
What does this option do to the phase plot?
ltspice phase bode-plot
ltspice phase bode-plot
asked Nov 26 at 9:49
user16307
4,8242396186
asked Nov 26 at 9:49
user16307
4,8242396186
asked Nov 26 at 9:49
user16307
4,8242396186
asked Nov 26 at 9:49
user16307
4,8242396186
asked Nov 26 at 9:49
user16307
4,8242396186
4,8242396186
Note that +180° == -180°.
– Jonathon Reinhart
Nov 26 at 15:39
add a comment |
Note that +180° == -180°.
– Jonathon Reinhart
Nov 26 at 15:39
Note that +180° == -180°.
– Jonathon Reinhart
Nov 26 at 15:39
Note that +180° == -180°.
– Jonathon Reinhart
Nov 26 at 15:39
add a comment |
1 Answer
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down vote
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It adds or subtracts multiples of $2pi$ (360 degrees) to each point in the phase plot so that the phase is plotted continuously rather than having jumps in it.
We know that physically the phase is going to be continuous from frequency to frequency. However as the output of the analysis is a vector gain at each frequency, all angles are reduced to the base range of +/- 180 degrees, so the graph has no way of knowing at any one frequency how many times phase has wrapped around the circle.
answered Nov 26 at 10:20
Neil_UK
72.9k274161
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
8
down vote
accepted
It adds or subtracts multiples of $2pi$ (360 degrees) to each point in the phase plot so that the phase is plotted continuously rather than having jumps in it.
We know that physically the phase is going to be continuous from frequency to frequency. However as the output of the analysis is a vector gain at each frequency, all angles are reduced to the base range of +/- 180 degrees, so the graph has no way of knowing at any one frequency how many times phase has wrapped around the circle.
answered Nov 26 at 10:20
Neil_UK
72.9k274161
add a comment |
up vote
8
down vote
accepted
It adds or subtracts multiples of $2pi$ (360 degrees) to each point in the phase plot so that the phase is plotted continuously rather than having jumps in it.
We know that physically the phase is going to be continuous from frequency to frequency. However as the output of the analysis is a vector gain at each frequency, all angles are reduced to the base range of +/- 180 degrees, so the graph has no way of knowing at any one frequency how many times phase has wrapped around the circle.
answered Nov 26 at 10:20
Neil_UK
72.9k274161
add a comment |
up vote
8
down vote
accepted
up vote
8
down vote
accepted
It adds or subtracts multiples of $2pi$ (360 degrees) to each point in the phase plot so that the phase is plotted continuously rather than having jumps in it.
We know that physically the phase is going to be continuous from frequency to frequency. However as the output of the analysis is a vector gain at each frequency, all angles are reduced to the base range of +/- 180 degrees, so the graph has no way of knowing at any one frequency how many times phase has wrapped around the circle.
answered Nov 26 at 10:20
Neil_UK
72.9k274161
It adds or subtracts multiples of $2pi$ (360 degrees) to each point in the phase plot so that the phase is plotted continuously rather than having jumps in it.
We know that physically the phase is going to be continuous from frequency to frequency. However as the output of the analysis is a vector gain at each frequency, all angles are reduced to the base range of +/- 180 degrees, so the graph has no way of knowing at any one frequency how many times phase has wrapped around the circle.
answered Nov 26 at 10:20
Neil_UK
72.9k274161
edited Nov 26 at 17:08
answered Nov 26 at 10:20
Neil_UK
72.9k274161
answered Nov 26 at 10:20
Neil_UK
72.9k274161
answered Nov 26 at 10:20
Neil_UK
72.9k274161
72.9k274161
add a comment |
add a comment |
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Note that +180° == -180°.
– Jonathon Reinhart
Nov 26 at 15:39