Merge branch 'main' of https://github.com/lhrodovalho/sky130sbcs

README.md

diff --git a/README.md b/README.md
index 2ddc653..d1af3c0 100644
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 Status and Issues
 ============
 
+* There are no schematics. All simulations are from extracted netlists.
+* This project also contains a CMOS only voltage reference based on the main current-source, but there is no documentation available.
+* There is a second version of the same current source, but using high-voltage transistors. Only the layer types were replaced.
 * Documentation is extremely incomplete.
 
 Team members