| ??? 09/30/05 12:44 Modified: 09/30/05 12:46 Read: times |
#101772 - Transformer in DAA Responding to: ???'s previous message |
Reza,
First you should read some basics of telephone line interfacung. http://www.tkk.fi/Misc/Elec...ioproblems http://www.epanorama.net/circuits/...lator.html Here you will find some information on transformer isolation. If you plan to use a line isolation transformer, make sure it is 1:1 600 ohm type. What are you actually trying to design? Are you just tapping DTMF from telephone line? I can't understand why there is a bridge in your design. Can you explain please? You are using bridge, on the other hand you have used differential configuration on MT8870. |
| Topic | Author | Date |
| MT8870 & MAX232 Compatibility!!! | 01/01/70 00:00 | |
| Ground | 01/01/70 00:00 | |
| Unanimous! | 01/01/70 00:00 | |
| Earthing! | 01/01/70 00:00 | |
| Thanks! | 01/01/70 00:00 | |
| DAA for MT8870 | 01/01/70 00:00 | |
| Thanks Ijaz | 01/01/70 00:00 | |
| Schematic! | 01/01/70 00:00 | |
| To Ijaz | 01/01/70 00:00 | |
| Re: Schematic | 01/01/70 00:00 | |
| Thanks! | 01/01/70 00:00 | |
| Another Question! | 01/01/70 00:00 | |
| The answer is obvious! | 01/01/70 00:00 | |
| Erik,Andy,Ijaz,Russell | 01/01/70 00:00 | |
| Transformer in DAA | 01/01/70 00:00 | |
| Transformer in DAA | 01/01/70 00:00 | |
| Is relay a good choice! | 01/01/70 00:00 | |
| sure, but what would that accomplish? yo | 01/01/70 00:00 | |
| You'll need something like this : | 01/01/70 00:00 | |
| Thanks, | 01/01/70 00:00 | |
| congratulation! | 01/01/70 00:00 | |
| I have used this way too,Reza! | 01/01/70 00:00 | |
similar | 01/01/70 00:00 |