Today I saw the schematic of a lenovo G480-la-7981p (download or download). On page 6 you can see this part:
In the green box you can see a buffered Reset line. My questions are:
- Why they've used a buffer? To filter noise?
- If so, then why a buffer? why not a simple capacitor?(e.g. 100nf) or an LC filter?
- What's the usage of resistors R32 and R34?
- I'm still diging whole of the schematic but don't get what is the difference between this resistor symbol
and this one
?
Edit: datasheet of SN74LVC1G07DCKR