4 ms·
Its funny how integration inverted the „BOM“. In discrete systems, transistors were the most expensive components and resistors/caps were dirt cheap, so somethi
by artemonster 3y ago
Its funny how integration inverted the „BOM“. In discrete systems, transistors were the most expensive components and resistors/caps were dirt cheap, so something like r-t-l made sense. On the chip, though, resistors and caps are „expensive“ due to huge area that they require and so its sometimes better/cheaper to emulate resistors and even capacitors with transistors
- CableNinja 3y agoThey dont emulate, they tune the transistor properties to get the required resistance or capacitance. Its pretty wild. They could use inbuilt caps and resistors, but, theres no need when tuning a transistor value yields the same result. Iirc, the capacitance is dealt with by the gap distance of transistors, resistance by the lead
- artemonster 3y agoby emulation I have meant this: https://en.wikipedia.org/wiki/Switched_capacitor https://en.wikipedia.org/wiki/Switched_capacitor