| ??? 08/31/05 13:16 Read: times |
#100344 - Think about the newbies Responding to: ???'s previous message |
Erik said:
For distances to, say 6 ft and speeds to, say, 2MHz the ferrite/ schmitt receiver solution works beautifully,... Erik, I know that you are doing the things right. But keep in mind, that lots of newbies are here, who very quickly read your recommendation as "We don't need this annyoing series termination, a simple ferrite bead does the same job". This is the only thing I wanted to focuse on. You are the one, normally, who insists on stating when a certain solution is not of general validity... Using your ferrite solution is clever, I use similar filters when bandwidth needn't to be very high. But: This is always demanding for very carful measurements, so that finally the things will actually go right. Just ferrites can be very critical, for instance, they come with enormeous tolerances and different values and sometimes, if the signal current is too high, then the ferrite material begins to saturate! Transmitting digital signals over a cable is always the work for a master, and maybe it leads to a more reliable solution to recommend the use of series termination, instead of a special ferrite filter design. Kai |
| Topic | Author | Date |
| driving ribboncabel - ESD precautions | 01/01/70 00:00 | |
| on interconnect | 01/01/70 00:00 | |
| Alternative | 01/01/70 00:00 | |
| comments. | 01/01/70 00:00 | |
| Recommended scheme | 01/01/70 00:00 | |
| 74H? | 01/01/70 00:00 | |
| nope | 01/01/70 00:00 | |
| Don't forget series termination | 01/01/70 00:00 | |
| series termination | 01/01/70 00:00 | |
| re: series termination | 01/01/70 00:00 | |
| an, in my opinion, much better way is to | 01/01/70 00:00 | |
| Series termination is the correct method | 01/01/70 00:00 | |
| both? | 01/01/70 00:00 | |
| Series termination prevents overshot | 01/01/70 00:00 | |
| HUH? | 01/01/70 00:00 | |
| Huh Huh? | 01/01/70 00:00 | |
| read the original post | 01/01/70 00:00 | |
| Think about the newbies | 01/01/70 00:00 | |
| That is exacltly why I always push the u | 01/01/70 00:00 | |
| RS485 is a good alternative, indeed | 01/01/70 00:00 | |
| Use a relay driver and sleep well ... | 01/01/70 00:00 | |
ferite bead, series termination, or | 01/01/70 00:00 |