Timeline for Adding two termination resistors on the same node?
Current License: CC BY-SA 4.0
6 events
when toggle format | what | by | license | comment | |
---|---|---|---|---|---|
Nov 27, 2021 at 1:17 | history | edited | Kevin White | CC BY-SA 4.0 |
added 356 characters in body
|
Nov 27, 2021 at 1:00 | history | edited | Kevin White | CC BY-SA 4.0 |
added 613 characters in body
|
Nov 27, 2021 at 1:00 | comment | added | Kevin White | @JoeyB - when a signal transition reaches the end of the line it will reflect if the termination does not match the characteristic impedance of the line (120 ohm). The reflection will then travel back down the line to the other end. If the other end of the line is terminated with 60 ohm there will be a smaller reflection there as the reflection amplitude is determined by the difference between the line impedance (120) and the termination (60 ohm in this case). The reflection will bounce back and forth until it is absorbed by losses | |
Nov 27, 2021 at 0:41 | comment | added | JoeyB | How does the circuit know where the termination resistor is placed in order to cause these reflections | |
Nov 27, 2021 at 0:40 | comment | added | JoeyB | So why are they reflections in the wire even after I measure 60ohms on the bus? How does the electrons know where the termination resistor is placed? Why does the placement of the termination resistor matter in longer or more than two nodes matter, especially since the electrons flowing only sees 60os resi | |
Nov 27, 2021 at 0:30 | history | answered | Kevin White | CC BY-SA 4.0 |