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Date
Re: 3rd Party Subcircuit Files
Hello, Although I am not the best person to answer this question I can answer it in part. When it asks you to "copy" the schematic from the library it means to copy the .asy file from the /symbols
By David Glover · #10804 ·
3rd Party Subcircuit Files
I am not understanding where/how to put 3rd party .SUBCKT files into LTSpice. The explaination in the PDF manual seems to have the cart before the horse. I "drew" a schematic using Opamp2. On page 94
By Lawrence Joy · #10803 ·
Re: Exporting group delay data
I would suggest the following approach: Plot -d(im(log(V(out))))/2/pi and export the result as Cartesian data. The real part will be the group delay, the imaginary part will be zero. LTspice is really
By Frank Wiedmann · #10802 ·
Re: SN55ALS195 model
<helmutsennewald@...> wrote:
By dave_flyfisher2000 · #10801 ·
Re: SN55ALS195 model
<david.edmondson@...> wrote: Hello Dave, There are models for the 74HC195 and 7HCT195 in the Files section. Files > Lib > Digital 74HCTxxx Files > Lib > Digital 74HCxxx Maybe the 74HCT195 model is
By Helmut Sennewald · #10800 ·
Re: Exporting group delay data
Hello Varoli, There is no way to directly export group delay in LTspice. You could plot and export the phase ph(V(out). This will require a little bit less work in the external post processing to get
By Helmut Sennewald · #10799 ·
SN55ALS195 model
Does anyone have a model please for a SN55ALS195 or SN75ALS195. Nothing comes up on Google. Regards....Flyfisher
By dave_flyfisher2000 · #10798 ·
Re: help to macromodeling with LTSpice
It looks like the description changed. It used to be limit( x, y, z ) = min( max( x,y ), z ) now it says limit( x, y, z) = intermediate value of x, y, or z At least I don't have to remember the order
By Tammo Heeren <Tammo.Heeren@...> · #10797 ·
Re: help to macromodeling with LTSpice
Hello Tammo, I wouldn't say the help-manual is incorrect. It only doesn't mention all possible cases. I think the description shown in the help pages is the same as in other SPICE programs. Best
By Helmut Sennewald · #10796 ·
Re: help to macromodeling with LTSpice
Hello Tin, You should apply the input voltage to "Vin" in the example below. Therefore you have to replace Vin with V(in). I have made an example for a complete ADC with sample/hold plus a DAC for
By Helmut Sennewald · #10795 ·
Re: how to implement RS232 function !!
As a substitute, you can use a comparator powered between +10 and -10 with the input threshold set at +2.5. It would need to have a totem-pole output , not open collector. You can simulate slew rate
By Jim Wagner <jim_d_wagner@...> · #10794 ·
Re: help to macromodeling with LTSpice
Having said that, I quick simulation clearly shows that all 4 variations of min, max, function work as expected. My apologies to Helmut. He was correct after all. I suppose the manual is incorrect.
By Tammo Heeren <Tammo.Heeren@...> · #10793 ·
Re: help to macromodeling with LTSpice
Helmut, it don't think this statement is quite correct. The manual states that : limit(x,y,z) = min( max(x,y), z) If we go through the permutations: limit( 0, 1, 2 ) = min( max( 0, 1 ), 2 ) = min( 1,
By Tammo Heeren <Tammo.Heeren@...> · #10792 ·
Re: help to macromodeling with LTSpice
hi helmut, really appreciate and grateful for your help as i was given the shortest time possible to finish simulating adc and Ltspice is totally foreign to me >.< right now i could only use the
By tingoose17 · #10791 ·
Exporting group delay data
I need to export group delay data from several circuit simulation for comparison purposes. From plot window i can only export trace data in polar or cartesian format, even if I plot only group delay.
By vincenzovaroli <varoli@...> · #10790 ·
how to implement RS232 function !!
Hi all is there any RS232 Transceiver available in LTspice ?? If so where to locate it or send me its model if someone has developed it personally. Alternatively how could this function be
By engrzmasood <engrzmasood@...> · #10789 ·
Re: help to macromodeling with LTSpice
Hello tin, The limit() function limits the output value. limit(min, max, function) limit(min, function, max) The order of the parameter doesn't matter. I have uploaded an example "limit1.asc" to the
By Helmut Sennewald · #10788 ·
Re: help to macromodeling with LTSpice
hi helmut, may i know how the 'limit' works? my interpretation of it seems to be wrong because the i can't get my circuit working regards, tin <helmutsennewald@...> wrote: <hjzwerver@> wrote: block
By tingoose17 · #10787 ·
Re: How to add variables of two or more .raw files?
Thanks Varoli, appreciate your help. <mailto:LTspice%40yahoogroups.com>, all
By parry_lion <parry_lion@...> · #10786 ·
Re: How to add variables of two or more .raw files?
Thanks Helmut.. Actually 10 was just an example. I am modeling nerve fibers in LTspice and I have around 100 netlists, probably more. No schematics. The result I am looking at is the sum of all the
By parry_lion <parry_lion@...> · #10785 ·