Has anyone seen this front-end before? - Page 67

Dave Zan · 10th July 2012, 05:50 AM

Quote:

Originally Posted by dadod

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

Best wishes
David.

wahab · 10th July 2012, 10:10 AM

It is obvious as well as the phase absolute value is aligned with 0dB gain......

blueskynis · 10th July 2012, 10:31 AM

Quote:

Originally Posted by Dave Zan

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.

Edmond Stuart · 10th July 2012, 11:03 AM

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.

dadod · 10th July 2012, 11:20 AM

Quote:

Originally Posted by Edmond Stuart

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

Edmond Stuart · 11:50 AM

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.

dadod · 10th July 2012, 11:57 AM

Now?
I dn't know how to reduce the number of vertical grid lines.

Edmond Stuart · 10th July 2012, 12:09 PM

I don't know either. Nevertheless it looks better now.
Thanks.

Smiley 09 · 10th July 2012, 12:17 PM

Hello Edmond,

Check - Y G M

Cheers

Dave Zan · 10th July 2012, 12:28 PM

Quote:

Originally Posted by blueskynis

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

10th July 2012, 11:03 AM	#664
Edmond Stuart diyAudio Member Join Date: Nov 2003 Location: Amsterdam	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. __________________ Een volk dat voor tirannen zwicht, zal meer dan lijf en goed verliezen dan dooft het licht…(H.M. van Randwijk)

10th July 2012, 11:30 AM	#666
Edmond Stuart diyAudio Member Join Date: Nov 2003 Location: Amsterdam	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. __________________ Een volk dat voor tirannen zwicht, zal meer dan lijf en goed verliezen dan dooft het licht…(H.M. van Randwijk) Last edited by Edmond Stuart; 10th July 2012 at 11:50 AM.

10th July 2012, 12:09 PM	#668
Edmond Stuart diyAudio Member Join Date: Nov 2003 Location: Amsterdam	I don't know either. Nevertheless it looks better now. Thanks. __________________ Een volk dat voor tirannen zwicht, zal meer dan lijf en goed verliezen dan dooft het licht…(H.M. van Randwijk)

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10th July 2012, 10:10 AM	#662
wahab diyAudio Member Join Date: Nov 2009 Location: algeria/france	It is obvious as well as the phase absolute value is aligned with 0dB gain......

10th July 2012, 12:17 PM	#669
Smiley 09 diyAudio Member Join Date: Sep 2009 Location: at Lake coast	Hello Edmond, Check - Y G M Cheers

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