Prev: another semi web site shot to hell?
Next: Jihad needs scientists
From: Robert Baer on 27 Sep 2006 22:56
I do not understand the error message and have no clue to fix it.
The inverter may be the problem; would like it to "emulate" a TPS2818
but do not know how.

From: Jenalee K. on 28 Sep 2006 04:09

Robert Baer a écrit :

> I do not understand the error message and have no clue to fix it.
> The inverter may be the problem; would like it to "emulate" a TPS2818
> but do not know how.

Actually playing with LTspice (V2.17i, May 2006) but not a specialist
at all, I loaded your design and let it run. What error message? I
don't get any. However, I don't think your circuit is doing what you
want it to do... or maybe the simulation is too short.

Thanks,
Jenalee K.

From: Johnny Boy on 28 Sep 2006 05:46

"Jenalee K." <jenaleek(a)yahoo.com> wrote in message
news:1159430963.613705.232810(a)b28g2000cwb.googlegroups.com...

Robert Baer a ?crit :

> I do not understand the error message and have no clue to fix it.
> The inverter may be the problem; would like it to "emulate" a TPS2818
> but do not know how.

Actually playing with LTspice (V2.17i, May 2006) but not a specialist
at all, I loaded your design and let it run. What error message? I
don't get any. However, I don't think your circuit is doing what you
want it to do... or maybe the simulation is too short.

Thanks,
Jenalee K.

The first thing that I noticed is that the op-amps are being powered by a
negative voltage, -12VDV


From: John - KD5YI on 28 Sep 2006 09:57
Johnny Boy wrote:
> "Jenalee K." <jenaleek(a)yahoo.com> wrote in message
> news:1159430963.613705.232810(a)b28g2000cwb.googlegroups.com...
>
> Robert Baer a ?crit :
>
>
>>I do not understand the error message and have no clue to fix it.
>> The inverter may be the problem; would like it to "emulate" a TPS2818
>>but do not know how.
>
>
> Actually playing with LTspice (V2.17i, May 2006) but not a specialist
> at all, I loaded your design and let it run. What error message? I
> don't get any. However, I don't think your circuit is doing what you
> want it to do... or maybe the simulation is too short.
>
> Thanks,
> Jenalee K.
>
> The first thing that I noticed is that the op-amps are being powered by a
> negative voltage, -12VDV
>
>

No, they are powered correctly. He inverted the sources and then specified
them as negative outputs, so they come out right.
From: John - KD5YI on 28 Sep 2006 10:12
Robert Baer wrote:
> I do not understand the error message and have no clue to fix it.
> The inverter may be the problem; would like it to "emulate" a TPS2818
> but do not know how.

(Snip netlist)

Hi, Robert -

I do not get an error message, either. What does the message say?

When you get past the message, you will probably find that you need to
specify Vhigh for A1. And, it would be a good idea to specify its Trise.

Cheers,
John
 |  Next  |  Last
Pages: 1 2 3 4 5 6
Prev: another semi web site shot to hell?
Next: Jihad needs scientists