Hello.
I am working on a bus driven system, and I want confirmation on something I think is true.
Should I terminate a bus on both its ends if there are various tri-state devices connected to it, and only one receiver at one of the ends?
So at one of the ends I have a CMOS gate, and the other end right now is open ended.
There are various CMOS gates attached to the bus, and various CMOS outputs into the bus, one driving it at a time.
When one of them drives the bus, the signal hits both ends and reflects, causing ringing.
By terminating at both ends I ensure reflections are swallowed at both ends. I am looking at parallel termination at both ends, so that the 5V wave arrives and gets to 5V in one shot.
Here's an image of a simple simulation of a transmission line:
As you can see, no reflections at any time from either end.
Can anyone confirm this ?
I am working on a bus driven system, and I want confirmation on something I think is true.
Should I terminate a bus on both its ends if there are various tri-state devices connected to it, and only one receiver at one of the ends?
So at one of the ends I have a CMOS gate, and the other end right now is open ended.
There are various CMOS gates attached to the bus, and various CMOS outputs into the bus, one driving it at a time.
When one of them drives the bus, the signal hits both ends and reflects, causing ringing.
By terminating at both ends I ensure reflections are swallowed at both ends. I am looking at parallel termination at both ends, so that the 5V wave arrives and gets to 5V in one shot.
Here's an image of a simple simulation of a transmission line:
As you can see, no reflections at any time from either end.
Can anyone confirm this ?