Timeline for Setting current source as active load in LTSpice
Current License: CC BY-SA 4.0
8 events
| when toggle format | what | by | license | comment | |
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| Mar 6, 2021 at 15:02 | vote | accept | KMC | ||
| Jan 8, 2021 at 16:28 | comment | added | a concerned citizen | @KMC It would do you good to know some basics. One of them is that in SPICE, current sources are meant to generate the prescribed current no matter what, even if both ends of the current source are grounded. | |
| Jan 7, 2021 at 15:43 | comment | added | KMC | @SteKulov these lines are wildly confusing. I can set internal resistance for voltage source, but there's no impedance to be set for current source in LTSpice. Shouldn't an ideal current source has 0 impedance anyway? Then that goes back to my question - how could a current source acts as a load - a load should be a resistor | |
| Jan 6, 2021 at 19:38 | answer | added | Ste Kulov | timeline score: 4 | |
| Jan 6, 2021 at 17:53 | comment | added | Ste Kulov |
Did you take a look at the built-in help page for I - Current Source? There's a little blurb in there that says this: "When flagged as a load, the current source starts to deviate from a constant current when the voltage across it drops to 0.5V. The impedance eventually drops to a resistance equal to .25Ω/amp times the value of the current source."
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| Jan 6, 2021 at 16:04 | history | edited | KMC | CC BY-SA 4.0 |
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| Jan 6, 2021 at 15:46 | history | edited | KMC | CC BY-SA 4.0 |
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| Jan 6, 2021 at 12:40 | history | asked | KMC | CC BY-SA 4.0 |