Repository navigation
Archive the J-Series fast-output equivalent circuit (spice/) - #30
Merged
Merged
Conversation
Add the ngspice deck (spice/jseries_fastout.cir) and a README documenting the MicroFJ-30020 fast-output equivalent circuit and how its two RC time constants map onto the --shape fast / --shape bench kernel parameters (tauLoad = R_L*N*C_f, tauRecovery = the loaded recovery constant). This gives the bipolar fast-output shaper added in #28 a datasheet-traceable provenance instead of hand-picked time constants. The fitted-kernel pipeline that consumes this deck is the follow-up (#29). Generated transient dumps (spice/*_tran.txt) are gitignored. Relates to #29.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
First of two stacked PRs giving the
--shape fastkernel a circuit provenance.This PR (archive): adds the ngspice deck
spice/jseries_fastout.cir(Onsemi J-Series fast-output equivalent circuit, MicroFJ-30020 values, datasheet Fig. 9 topology) plusspice/README.mddocumenting it and how its two RC time constants map onto the shaper parameters:tauLoad = R_Lfast · N · C_f— the fast-rail RC (≈ 2.5 ns here);tauRecovery— the loaded recovery constant of the fast tail (≈ 24.5 ns).So
--shape fast(added in #28) is a two-pole reduction of this circuit, and the time constants stop being hand-picked. Generated transient dumps (spice/*_tran.txt) are gitignored.Follow-up PR (#29):
spice → kernelpipeline — a script that runs this deck and emits the fittedtauLoadas a ready-to-runparams.json. It is stacked on this branch.Based on
fast-output-shaping(#28) because the README references the kernel that PR adds; merge #28 first, then this, then the pipeline. Relates to #29.