Xamp-simulations problem_s

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The one and only
Joined 2001
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Mind you, I have nothing against SPICE per se, and you're
right - it's more addictive than Doom.

I use MicroCap - the old DOS only version, and I only use it
to design filters and passive networks. In this sort of application
I have never had any problems. Before that I used the HP
version of CAP (I have the source code, ha ha) which I liked
even better.

Truth be told, I have never simulated an Aleph or an X or a
Zen, and I couldn't tell you how well the models stack up to
the real thing, but I do know that gain devices do not always
match up well enough to the models to reliably predict distortion
figures, even if SPICE was perfect.
 
fig4

hi grataku,

no I didn´t, I don´t see any advantages in fig4 except
copyright issues and more money for InternationalRectifier:devilr:

just kiddin

I got no time so far to build a circuit on breadboard and
manage it to work properly. The matching issue is doubled!

As I´m not a friend of SPICE (except Tabasco sauce!)
I prefer working with real parts and this is time- and
moneyconsuming.

Uli:nod: :nod: :nod:

PS: As our great NP derives his Xes from fig3 too I don´t
see any reason not to do the same.


PPS: btw did you ever try DOOM2??
:clown: :clown: :clown:
 
Re: fig4

uli said:
PS: As our great NP derives his Xes from fig3 too I don´t
see any reason not to do the same

PPS: btw did you ever try DOOM2??
:clown: :clown: :clown: [/B]

PS Figure 3? Really? I just learned something.

PPS Yep, I did it all, my last "shoot them up" game was Half Life which I adored.
That was back when people were not coding the game to go with a movie.
Now they don't even need to think about the plot anymore.
 
lots of figs

As fig1 and fig3 are basically the same (in 3 some sourcefollowers
are added) just as 2 and 4 I don´t understand why your sim
works with fig2 but not with fig4.

You have to take into calculation that those figures are idealized
principle diagrams, not real circuits!
In fig2 (4) you have to add some gate bias voltage to the input
fets or use models for mosfets which are conductive at zero
gate.(or take JFETs like Erno Borbely)
To get this circuit to work properly is a "Sissiphus" task, I bet
you won´t be able to balance all those CCSes !

Because of this issue I would prefer fig3 circuits - they allow
DC coupling (X1000) and support the theory of simplicity
(A. Einstein);)

Uli:nod: :nod: :nod:
 
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