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Date
Re: Sub circuit heat dissipation not showing
Nit: "there is **no such thing** as 'RMS power'." Well, there is, but you wouldn't find it a useful thing to compute. As you said, it has no physical significance. So nobody ever calculates RMS power.
By Andy · #90124 ·
Re: Sub circuit heat dissipation not showing
Hello Brad, Ctrl left mouse click on the power formula in the waveform window. Then you will get a single number which is the average power. Best regards, Helmut
By Helmut Sennewald · #90140 ·
Re: Sub circuit heat dissipation not showing
Not an answer to your question, but there is **no such thing** as 'RMS power'. The product of RMS voltage and RMS current with zero phase difference is 'average power'. For pedants, one can calculate
By John Woodgate <jmw1937@...> · #90101 ·
Re: "4 GROUP.zip" upload
Thanks Andy, I'm still working on fully understanding your post. Thanks Bordodynov, I added your 2 model.s The BS250P returned and error. "Error on line 602 : .model bs250p vdmos pchan rg=160
By kinarfi · #90236 ·
Re: Need help to design a transimpedance amplifier
Hi there,Please, Please see an Idea I have posted in the Temp Folders of this group. (Photo Amplifier15.asc) Best regards,Michael P Kiwanuka To: LTspice@... From: LTspice@...
By Michael Peter Kiwanuka · #90099 ·
Re: Henry's current transformer problem
From the available data we have not seen Br depending temperature change from 25¡ã C to 100¡ã C. Bordodynov. 05.08.2016, 15:56, "hkafeman@... [LTspice]" <ltspice@...>:
By §¡§Ý§Ö§Ü§ã§Ñ§ß§Õ§â §¢§à§â§Õ§à§Õ§í§ß§à§Ó · #90108 ·
Re: Henry's current transformer problem
Borodoynov Thank you that looks like a good typical material to use. My understanding is then that given that I am operating at only 50Hz with just some high frequency transients, that any core losses
By hkafeman@... · #90097 ·
Re: Henry's current transformer problem
Hello Henry Kafeman. See material N41 BS (25 ¡ãC)=490mT BS (100 ¡ãC)=390mT Hc (25 ¡ãC)=22A/m Hc (100 ¡ãC)=20A/m Br=0.1T Power Transformer (low loss) f<100 kHz N27 (?i = 2000 ) low cost, hi-power N41
By §¡§Ý§Ö§Ü§ã§Ñ§ß§Õ§â §¢§à§â§Õ§à§Õ§í§ß§à§Ó · #90096 ·
Re: Henry's current transformer problem
analogspiceman and Andy Thank you for your replies. I appreciate that there are many different Ferrite materials. I do not know which specific material my CT is made of, so am looking to model a
By HKafeman <hkafeman@...> · #90095 ·
Re: Need help to design a transimpedance amplifier
Thanks for your response Jerry Lee Marcel.. But...I could see this noise everywhere in the circuit.. I mean power supply as well...
By t.obulesu@... · #90093 ·
Re: Need help to design a transimpedance amplifier
I design a lot of TIA type of amp. I don't know what kind of speed you are looking for. But your requirement is very easy, the lowest is 200nA. Any opamp with bias current of less than 10nA will work
By Alan Liu · #90110 ·
Re: Need help to design a transimpedance amplifier
I tried to answer a couple of days ago, but it didn't come through, so I'll write it again: The noise you observe compes from the fact that you have these big 100k resistors in the non-inverting
By Jerry Lee Marcel · #90090 ·
Re: "4 GROUP.zip" upload
I am sorry. .MODEL BS250P .... Bordodynov. 05.08.2016, 09:35, "§¡§Ý§Ö§Ü§ã§Ñ§ß§Õ§â §¢§à§â§Õ§à§Õ§í§ß§à§Ó BordodunovAlex@... [LTspice]" <ltspice@...>:
By §¡§Ý§Ö§Ü§ã§Ñ§ß§Õ§â §¢§à§â§Õ§à§Õ§í§ß§à§Ó · #90089 ·
Re: "4 GROUP.zip" upload
Hi. .model BS170 VDMOS VTO=1.824 RG=270 RS=1.572 RD=1.436 RB=.768 KP=.1233 Cgdmax=20p Cgdmin=3p CGS=28p Cjo=35p Rds=1.2E8 IS=5p Bv=60 Ibv=10u Tt=161.6n .MODEL BS250 VDMOS pchan Rg=160 VTO=-3.193
By §¡§Ý§Ö§Ü§ã§Ñ§ß§Õ§â §¢§à§â§Õ§à§Õ§í§ß§à§Ó · #90088 ·
Re: PWL TRIGGER syntax
TRIGGER V(n003)>1 Without knowing what you have, if you're using the "trigger" keyword with current sources, it doesn't work, only for voltage sources. Vlad ______________________
By Vlad · #90087 ·
Re: BS250 & BS170 SIM
Jeff wrote: "they look like they should work, but the don't, how can I add them to my CMP folder, that is what is the correct model layout." I just noticed you sent this question two days ago. It
By Andy · #90084 ·
Re: Sub circuit heat dissipation not showing
Brad wrote: "I hit SEND but it isn't here ?? I don't understand. Humm.." Yup. Yahoo was having major problems yesterday. Hopefully that is over. File uploads/downloads seemed to be unaffected, but
By Andy · #90080 ·
Re: LTspice IV (NOT RESPONDING)
There is one thing I can do with LTspice on my home computer that causes Windows to think it is not responding. If I turn on Mark Data Points in the waveform display, and if the density of points is
By Andy · #90117 ·
Re: PWL TRIGGER syntax
Hello, The 32 bit version of LTspiceXVII had a problem with PWL in early versions. Do you use the 32 bit version LTspiceXVII.exe(x86)? Please update LTspiceXVII to the latest version. Tools > Sync
By Helmut Sennewald · #90079 ·
Re: "4 GROUP.zip" upload
Jeff asked: "Is there an easy or a standard way to make a model for these transistors that can be included in LIB/cmp/standard.mos?" For the BS250P and BS170 transistor models you used, no, there
By Andy · #90086 ·