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Installing and using LTspice IV. From beginner to advanced.
Installing and using LTspice IV. From beginner to advanced.
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Old 10th October 2017, 02:54 PM   #841
FdW is offline FdW  Netherlands
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Installing and using LTspice IV. From beginner to advanced.
And one more
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Old 13th October 2017, 01:54 PM   #842
mr2racer is online now mr2racer  United States
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Installing and using LTspice IV. From beginner to advanced.
Hello!
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Old 26th October 2017, 09:30 AM   #843
jazbo8 is offline jazbo8
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Installing and using LTspice IV. From beginner to advanced.
Is there a way to display sub grid lines for the Y-axis when using the Log scale?
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Old 26th October 2017, 10:30 AM   #844
Mooly is offline Mooly  United Kingdom
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Installing and using LTspice IV. From beginner to advanced.
You know more than me on all this

In what context do you mean ? What view do you want grid lines to display on.
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Old 26th October 2017, 10:56 AM   #845
jazbo8 is offline jazbo8
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Installing and using LTspice IV. From beginner to advanced.
It's something so simple, but why is the tick gray out for the Y-axis log scale?!
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Old 26th October 2017, 11:18 AM   #846
martyh is offline martyh  United States
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Quote:
Originally Posted by FdW View Post
And one more
Not sure how I missed your posts before this morning but thank you for the help. Very cool stuff
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Old 26th October 2017, 12:13 PM   #847
Mooly is offline Mooly  United Kingdom
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Installing and using LTspice IV. From beginner to advanced.
Dunno on that one. It is the same in LTXVII, greyed out.

'Tick' is the scaling isn't it ? so log scaling isn't a constant increment like 10, 20, 30 etc, if that makes sense.
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Old 26th October 2017, 12:34 PM   #848
jazbo8 is offline jazbo8
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Installing and using LTspice IV. From beginner to advanced.
The spacing on the log scale isn't constant, but surely the software can figure it out, since the X-axis ticks work just fine. Must be a "feature" of LTSpice.
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Old 26th October 2017, 03:01 PM   #849
Mooly is offline Mooly  United Kingdom
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Installing and using LTspice IV. From beginner to advanced.
X axis is greyed out for me when selecting log (last image). I can't see how you could enter a setting for 'log' because ech increment goes up by a power of ten. You can set the upper and lower limits though.

Some of the other settings seem a bit odd, as if it doesn't like some values
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Old 13th November 2017, 01:31 PM   #850
jan.didden is offline jan.didden  Europe
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Default Node 0 in subcircuit converted?

Almost all subcircuits have an internal node 0 as the 'ground' node for that particular circuit.

But what happens when you use for instance an opamp that floats with Vcc=200V and Vee=170V? In real world that would work fine (assuming the input/output signal common mode is respected).

I had some problems with such a circuit in my previous sim as it kept some internal subcircuit bias R's and generators referred to gnd which now is 170+V away of course.

In LTspice is seems to work, so I wonder is LTspice *somehow* modifies the internal node 0 to *some* circuit node that can float with power supply?

Anyone knows about this?

Jan
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