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A comment on Reverse-engineering a vintage power supply chip from die photos. Parent comment

Re:Reverse-engineering a vintage power supply chip from die ... by msandford on Wednesday August 18, 2021 @10:01PM (#28229505)
N type and p type have different resistance so to get a balanced transistor you need different area proportions of each. If memory serves that is.
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Re:Reverse-engineering a vintage power supply chip from die ... by userbinator on Wednesday August 18, 2021 @10:15PM (#28229593)
Holes have lower mobilty than electrons, so P-doped areas must be larger for the same equivalent resistance.
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