| ??? 04/05/07 15:37 Read: times |
#136689 - Schmitt trigger for crystal oscillator?? Responding to: ???'s previous message |
Should you really be using a Schmitt trigger for the inverter in the crystal oscillator? Ideally, the feedback resistor biases the inverter at the point of maximum gain.
Some Schmitt triggers these days are actually a RS latch, with set and reset driven by inverters with different thresholds. They will tend to oscillate without a crystal, and may oscillate at the wrong frequency with a crystal. |
| Topic | Author | Date |
| single crystal for two 89c52 | 01/01/70 00:00 | |
| I think you might find it doesnt work like that | 01/01/70 00:00 | |
| Schmitt trigger for crystal oscillator?? | 01/01/70 00:00 | |
| yeah possibly | 01/01/70 00:00 | |
| As it happens ... | 01/01/70 00:00 | |
| I yield to the voice of experience | 01/01/70 00:00 | |
| I was quite surprised, too! | 01/01/70 00:00 | |
| One quartz to | 01/01/70 00:00 | |
| not a good idea | 01/01/70 00:00 | |
| But how much do you save... | 01/01/70 00:00 | |
commentary - corollary | 01/01/70 00:00 |