Small circuits in TTL and RTL we could do intuitively, without any methodology. But what about a complex circuit like 555 timer?
If it was designed using logic gates, it could be easily deduced by using boolean algebra, truth table, k-map, etc. These could be the methodology.
Not intuitive.
The 555 timer was designed with a complex transistor network and some passive components.
I know that transistor building blocks are just what was used to make logic gates, but what methodology used to design the 555 timer, or it was completely intuitive (no methodology?)
555
is a very simple circuit. It is based on parts that are common to different multivibrator configurations and packed in a single package. \$\endgroup\$