| ??? 02/08/05 11:44 Read: times |
#86886 - not this way Responding to: ???'s previous message |
While the PC817 is rather slow and yes, its speed varies with the load (and VCE); I would never use it for explicit noise supression. trise/tfall maximum is guaranteed, not minimum => "low pass" property is not guaranteed.
Further, RF noise gets "through" the optocoupler thanks to quite significant capacitive coupling. Use proper noise rejection techniques - snubbers, transils/transorbs, filters, ferrite beads etc. Jan Waclawek |
| Topic | Author | Date |
| PC817 optocoupler design aspects | 01/01/70 00:00 | |
| For AC i use the PC814 | 01/01/70 00:00 | |
| not this way | 01/01/70 00:00 | |
| PC817 | 01/01/70 00:00 | |
| assorted comments | 01/01/70 00:00 | |
| Optocoupler | 01/01/70 00:00 | |
| Opto Coupler Design Guide | 01/01/70 00:00 | |
So far so good.. | 01/01/70 00:00 |