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Old 10th July 2012, 05:50 AM   #661
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Quote:
Originally Posted by dadod View Post
Something like this?
dado
No, sorry it was not clear. What I meant was that the 0 dB line should be -180 phase (= 0 PM). Not 200 phase as in this plot. In the previous post it varies between plots. In the middle it's -200 but the others are -240. Inconsistency makes comparisons harder.
A consistent use of 0 dB = 0 PM would make it instantly obvious if an amp was stable

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David.
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Old 10th July 2012, 10:10 AM   #662
wahab is offline wahab  Algeria
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It is obvious as well as the phase absolute value is aligned with 0dB gain......
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Old 10th July 2012, 10:31 AM   #663
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Quote:
Originally Posted by Dave Zan View Post
In these discussions of comparative stability it is easier if plots have the 0 dB line as also the 0 phase margin.
Is there a convenient way to force this in LTSpice?

David
When the plot windows is focused, press CTRL+A and type "1" into Expression field, without quotation marks.
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Old 10th July 2012, 11:03 AM   #664
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Default nicer pictures

To all LT spice user:

In order to enhance the readability, also change the background color of the graphs from black to white and regarding schematics from grey also to white and without grid.
Thank you.

Cheers,
E.
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Old 10th July 2012, 11:20 AM   #665
dadod is offline dadod  Croatia
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Quote:
Originally Posted by Edmond Stuart View Post
To all LT spice user:

In order to enhance the readability, also change the background color of the graphs from black to white and regarding schematics from grey also to white and without grid.
Thank you.

Cheers,
E.
I do not think this is more readable, only better for the printer toners.
dado
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Old 10th July 2012, 11:30 AM   #666
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To me the schematic looks much better, the graph however, is too much cluttered with grid lines. Is it possible to reduce the number of vertical grid lines?

Cheers,
E.

edit: I don't like books either printed on grey or black paper.
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Last edited by Edmond Stuart; 10th July 2012 at 11:50 AM.
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Old 10th July 2012, 11:57 AM   #667
dadod is offline dadod  Croatia
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Now?
I dn't know how to reduce the number of vertical grid lines.
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Old 10th July 2012, 12:09 PM   #668
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I don't know either. Nevertheless it looks better now.
Thanks.
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Old 10th July 2012, 12:17 PM   #669
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Hello Edmond,

Check - Y G M

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Old 10th July 2012, 12:28 PM   #670
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Quote:
Originally Posted by blueskynis View Post
When the plot windows is focused, press CTRL+A and type "1" into Expression field, without quotation marks.
That doesn't alter the phase axis scale.
It just plots a constant value of 1 with the associated phase of 0.

Best wishes
David
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