I use LTSpice, but I'd like to take simulations to the next level.
In all my current Spice modelling the power-supply is an ideal-world kind of thing. No noise, no surges, no impedance/inductance or capacitance... no real-life artifacts at all.😡
I need some more real-life added to the simulations, therefore this question:
Is there a possibility in the current symbols to add these aspects in an easy way, or do I need new model-based components to achieve this?
Being an absolute illiterate in Spice parameters, I need some help!
In all my current Spice modelling the power-supply is an ideal-world kind of thing. No noise, no surges, no impedance/inductance or capacitance... no real-life artifacts at all.😡
I need some more real-life added to the simulations, therefore this question:
Is there a possibility in the current symbols to add these aspects in an easy way, or do I need new model-based components to achieve this?
Being an absolute illiterate in Spice parameters, I need some help!
The LTSpice voltage sources let you specify an equivalent series resistance. That's a start.
You can also add a series inductance, followed by a shunt capacitor. (Your real design almost certainly has bypass capacitors anyway.) Both of the LTSpice reactances have been "enhanced" from the basic SPICE circuit elements by allowing you to specify a full suite of parasitic element values, so you can build up a rather complex model of power supply output plus circuit interconnect wiring with just a single component showing on your simulation schematic. (According to Mike Englehardt, the architect and author of LTSpice, these reactances with 3 or 4 parasitic components actually simulate faster and more accurately than specifying each basic circuit element separately.)
If you are very thorough you could even build an entire power supply and regulator as a hierarchical block and include it in the simulation of your amplifier. You'll probably have to pre-set some initial conditions to their steady-state values to avoid dealing with long start-up times in the simulation.
Dale
You can also add a series inductance, followed by a shunt capacitor. (Your real design almost certainly has bypass capacitors anyway.) Both of the LTSpice reactances have been "enhanced" from the basic SPICE circuit elements by allowing you to specify a full suite of parasitic element values, so you can build up a rather complex model of power supply output plus circuit interconnect wiring with just a single component showing on your simulation schematic. (According to Mike Englehardt, the architect and author of LTSpice, these reactances with 3 or 4 parasitic components actually simulate faster and more accurately than specifying each basic circuit element separately.)
If you are very thorough you could even build an entire power supply and regulator as a hierarchical block and include it in the simulation of your amplifier. You'll probably have to pre-set some initial conditions to their steady-state values to avoid dealing with long start-up times in the simulation.
Dale
Dale,
thanks for your reply. What you pointed out is exactly what I'm looking for. Some guidance from experienced Spice users (who also master the black Art of parameters) is what I also need.
But I guess I have to be more precise regarding the requirements for such models.
thanks for your reply. What you pointed out is exactly what I'm looking for. Some guidance from experienced Spice users (who also master the black Art of parameters) is what I also need.
But I guess I have to be more precise regarding the requirements for such models.
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