Re: Overriding a library diode's internal parameter(s)
Does it matter if it's "rs", "RS", or "Rs"? It being windows probably not?
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Richard Andrews
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#159760
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Re: Overriding a library diode's internal parameter(s)
Actually, I meant: LTspice XVII doesn't recognize rs as a//parameter of a diode /model/, which cannot be true. But what really matters is why the error occurs and how can it be fixed. -- Be
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John Woodgate
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#159759
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Re: Overriding a library diode's internal parameter(s)
No, that is actually correct.? Here is what a Diode element line should look like, according to LTspice's Help: Notice there is no parameter named Rs.? The only listed parameters are Area, "off", M,
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Andy I
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#159758
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Re: Overriding a library diode's internal parameter(s)
Actually, defining something twice (or more) is usually OK in most SPICE programs.? I think it was designed to work that way. In LTspice, sometimes you get a warning message, sometimes not.? And in
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Andy I
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#159757
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Re: Overriding a library diode's internal parameter(s)
FYI, another way you can do that, which might work reasonably well, is this: * Edit the .MODEL command to make its Rs=0. * Add a discrete resistor in series with the diode, with resistance = Rs. There
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Andy I
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#159756
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Re: Overriding a library diode's internal parameter(s)
When you use "Pick New Diode", you select from the diodes in your standard.dio (and/or user.dio).? Therefore, open standard.dio in Notepad/Wordpad or your editor of choice, or in LTspice itself.?
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Andy I
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#159755
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Re: Overriding a library diode's internal parameter(s)
I have to think on that, Andy! Please see the file AD_PV_Sim 250410.zip I just uploaded. Dave Sent: Thursday, April 10, 2025 12:10 PM To: [email protected] Subject: EXTERNAL: Re: [LTspice] Overriding
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Bell, Dave
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#159753
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Re: Overriding a library diode's internal parameter(s)
Ah, that would means that LTspice XVII doesn't recognize rs as a parameter of a diode, which cannot be true. Can you try another diode, just to see if you get the same error? You could also upload
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John Woodgate
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#159752
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Re: Overriding a library diode's internal parameter(s)
In case it matters, ... Be careful with diode parameter 'N'. 'N' in the .model statement means Emission Coefficient. 'N' in the diode element line is the diode multiplier. This is a SPICE thing that
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Andy I
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#159751
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Re: How to simulate the gate charge characteristic given in the datasheet of a mosfet?
Ankit, I will try to address your questions. 3) All measurements made by the .meas statements are done after the simulation has ended. They are done by a post processing step and have access to all
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Dennis
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#159750
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Re: Overriding a library diode's internal parameter(s)
Well defining it twice is no good.
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Richard Andrews
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#159749
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Re: How can I create a continuously (kind of) varying duty cycle in one simulation
I absolutely LOVE the TimerBlox line! SO many components rolled into one ddevice¡ Sent: Thursday, April 10, 2025 11:41 AM To: [email protected] Subject: EXTERNAL: Re: [LTspice] How can I create a
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Bell, Dave
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#159748
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Re: Overriding a library diode's internal parameter(s)
OK, correcting my confusings¡ N={Ns} was a typo; I have N={N}, and that ¨C by itself ¨C works correctly. It¡¯s the second parameter, rs={Rs} that causes a fault: Error on line 3 : d1 vpv 0 mur460
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Bell, Dave
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#159747
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Re: How can I create a continuously (kind of) varying duty cycle in one simulation
Answer: Use LTC6992 Voltage Controlled PWM Peter Sent from AT&T Yahoo Mail on Android
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PK
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#159746
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Re: Overriding a library diode's internal parameter(s)
Hello, Richard. I'm not running the sim, that is Dave Bell. I think N={N} is wrong because there is already N={Ns}; it can't be defined twice.
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John Woodgate
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#159745
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Re: Overriding a library diode's internal parameter(s)
Hello John, Not that it matters, but N={N} Rs={Rser} looks right to me. What version of LTspice are you running? What exactly does the log file say?
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Richard Andrews
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#159744
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Re: Overriding a library diode's internal parameter(s)
I don't understand this line: I tried adding an override of rs by ¡°N={N} Rs={Rser}¡±, What is N={N} for? I don't think you need it: Rs is in every instance of the diode already. Do you have a line
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John Woodgate
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#159743
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Overriding a library diode's internal parameter(s)
I was working with the recently linked AD PV Cell sim. It uses a MUR460 library diode, multiple in series, to simulate the cell/string's forward voltage. The default series resistance seems too high,
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Bell, Dave
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#159742
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Re: Classic Menu vs Keyboard shortcuts
See this post on ADI's EZone: https://ez.analog.com/design-tools-and-calculators/ltspice/f/q-a/577705/i-would-like-to-use-the-legacy-pre-ltspice-24-ltspice-gui
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Voegeli, Benjamin
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#159741
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Re: NCS2001
I get "timestep too small". Is that NOT the error you see? Andy
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Andy I
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#159740
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