| ??? 04/20/05 17:37 Read: times |
#92006 - not really noise Responding to: ???'s previous message |
Another consideration is the choice between the efficiency of switching supplies such as the PT6302 and the low noise of linear regulators.
The switching frequency would drift over quite long periods of time and either correlate or not with our modulation frequency The problem John describes I would not call noise, I'd call it "biting". If you modulate anything you have to keep all kinds of stuff away. Two experiences: Had to replace a local oscillaotor with a uC clock derived frequency for a chopper stabilized op-amp. Had to totally rework an OCR because the modulation was bitten by the frequency of an Am transmitter on top of the building. Erik |
| Topic | Author | Date |
| What is your favorite... 3.3V source | 01/01/70 00:00 | |
| RE: 3.3V | 01/01/70 00:00 | |
| Me too | 01/01/70 00:00 | |
| Not my fave | 01/01/70 00:00 | |
| All I have is mixed | 01/01/70 00:00 | |
| The real pain of mixed | 01/01/70 00:00 | |
| Linear v switchers | 01/01/70 00:00 | |
not really noise | 01/01/70 00:00 | |
| We've been stepping up | 01/01/70 00:00 |