CompliantParts.zip, on the Device Models & Subcircuits Page of my
website, has been updated to include subcircuit representations...
making it easier to import into LTspice...

Spice devices IDC, F and G are replaced by devices IDCLC, FLC and GLC

These current-output devices exhibit real-world behavior... they will
not pull their outputs to negative infinity. They stop pulling
current at a voltage defined by COMPLIANCE with a transition to zero
current over a span defined by TRANSITION.

All derivatives exist and are continuous... thus no convergence
problems.

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: skypeanalog | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

On Wed, 15 Apr 2015 13:42:45 -0700, Jim Thompson
wrote:

CompliantParts.zip, on the Device Models & Subcircuits Page of my
website, has been updated to include subcircuit representations...
making it easier to import into LTspice...

Spice devices IDC, F and G are replaced by devices IDCLC, FLC and GLC

These current-output devices exhibit real-world behavior... they will
not pull their outputs to negative infinity. They stop pulling
current at a voltage defined by COMPLIANCE with a transition to zero
current over a span defined by TRANSITION.

Negative resistance?


All derivatives exist and are continuous... thus no convergence
problems.

...Jim Thompson

LT Spice allows a current source to have the "active load" attribute,
where it can't generate power. There is also a "load" component, which
looks like a current source to me, just a different symbol.


--

John Larkin Highland Technology, Inc
picosecond timing precision measurement

jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com

On Wed, 15 Apr 2015 14:50:31 -0700, John Larkin
wrote:

On Wed, 15 Apr 2015 13:42:45 -0700, Jim Thompson
wrote:

CompliantParts.zip, on the Device Models & Subcircuits Page of my
website, has been updated to include subcircuit representations...
making it easier to import into LTspice...

Spice devices IDC, F and G are replaced by devices IDCLC, FLC and GLC

These current-output devices exhibit real-world behavior... they will
not pull their outputs to negative infinity. They stop pulling
current at a voltage defined by COMPLIANCE with a transition to zero
current over a span defined by TRANSITION.

Negative resistance?

No. As the headroom reduces so does the available current drive...
just like a real current sink.



All derivatives exist and are continuous... thus no convergence
problems.

...Jim Thompson

LT Spice allows a current source to have the "active load" attribute,
where it can't generate power. There is also a "load" component, which
looks like a current source to me, just a different symbol.

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: skypeanalog | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.