How to change logic levels in LTSPice?

[Helmut Sennewald]

Thanks, Helmut. I just got mail from a reader of these groups and he
suggested the same. Works!



That's what I tried at first. Well, at least no smoke came out of the PC.
In real life it would have been phssst ... BANG



I'll have to see whether I can get that group through gmane. The Yahoo
interface is such a pain.

Hello Joerg,

I highly recommend to use a web browser. There are so many goodies
on the group's webpage. You would miss them all if you use
any simple message viewer.
After you have registered the for the group, set your email account to "No
email".
Otherwise your email account would be flooded with 500 messages per month.

http://tech.groups.yahoo.com/group/LTspice/

Best regards,
Helmut

 

[Joerg]

First time for me to do mixed mode sims on LTSpice. How do you change
the voltage level of behavioral logic such as "AND" from the default 1V
to some other voltage?

Maybe even other parameter such as rise/fall times, prop delays?

 

[Helmut Sennewald]

First time for me to do mixed mode sims on LTSpice. How do you change the
voltage level of behavioral logic such as "AND" from the default 1V to
some other voltage?

Maybe even other parameter such as rise/fall times, prop delays?

Hello Joerg,

Right-mouse-click on the device in your schematic. A dialog will be shown.
Enter the parameter(s) into any field from "Value" to "SpiceLine2".

Vhigh=5 Vlow=0 Ref=1.5
Trise=5n Tfall=5n Td=5n

"Ref" is the threshold. Default is (Vhigh+Vlow)/2

Don't connect anything to unused inputs!

You want or need examples?
http://tech.groups.yahoo.com/group/LTspice/files/ Tut/Digital A-Devices/

Best regards,
Helmut

 

[Joerg]

Hello Joerg,

Right-mouse-click on the device in your schematic. A dialog will be shown.
Enter the parameter(s) into any field from "Value" to "SpiceLine2".

Vhigh=5 Vlow=0 Ref=1.5
Trise=5n Tfall=5n Td=5n

"Ref" is the threshold. Default is (Vhigh+Vlow)/2

Thanks, Helmut. I just got mail from a reader of these groups and he
suggested the same. Works!

Don't connect anything to unused inputs!

That's what I tried at first. Well, at least no smoke came out of the
PC. In real life it would have been phssst ... BANG

You want or need examples?
http://tech.groups.yahoo.com/group/LTspice/files/ Tut/Digital A-Devices/

I'll have to see whether I can get that group through gmane. The Yahoo
interface is such a pain.

 

[Joerg]

Hello Joerg,

I highly recommend to use a web browser. There are so many goodies
on the group's webpage. You would miss them all if you use
any simple message viewer.
After you have registered the for the group, set your email account to "No
email".
Otherwise your email account would be flooded with 500 messages per month.

http://tech.groups.yahoo.com/group/LTspice/

Well, I am signed up since a while. Another ID and password to remember,
sometimes it won't recognize me, and so on. If at least the message
board itself would be a newsgroup. So much more efficient.

 

[JosephKK]

Hello Joerg,

I highly recommend to use a web browser. There are so many goodies
on the group's webpage. You would miss them all if you use
any simple message viewer.
After you have registered the for the group, set your email account to "No
email".
Otherwise your email account would be flooded with 500 messages per month.

http://tech.groups.yahoo.com/group/LTspice/

Best regards,
Helmut

What a nutter. I use a real news reader and i do not have any problem
wading through 1000 posts a month. They do not appear in my email
inbasket. But about 200 spams a month do arrive past my ISP's
filters, but they are not the same.