| ??? 05/07/11 14:42 Read: times |
#182192 - Length of gnd/vcc "bumps" in relation to period difference Responding to: ???'s previous message |
Kai Klaas said:
Per said:
The closer the two frequencies are, the harder it is to manage to filter the supply enough that they will not interfere. The funny thing was, that in my application the frequencies were very different. When the two oscillators locked, the one frequency was an exact multiple of the other. It's enough that the time constants on the bumps on VCC and/or GND spans the period difference between the two oscillators so that when they get close enough in phase, the "bumps" created by the other oscillator still remains and sucks in the first oscillator. So the two oscillators can lock on to each other even with quite large frequency differences between the two, if the frequencies are high or the bounces are long. |
| Topic | Author | Date |
| An excellent demonstration of coupling between oscillators | 01/01/70 00:00 | |
| Many many years ago... | 01/01/70 00:00 | |
| You don't suppose that was for a reason, do you? | 01/01/70 00:00 | |
| Sensitivity since lack of "mass" to uphold frequency | 01/01/70 00:00 | |
| Even in well-filtered applications ... | 01/01/70 00:00 | |
| Ground bounce... | 01/01/70 00:00 | |
| Length of gnd/vcc "bumps" in relation to period difference | 01/01/70 00:00 | |
| That was an interesting problem | 01/01/70 00:00 | |
| Signetics (later as Philips) made 74HC7046 | 01/01/70 00:00 | |
| That's a really nice demo | 01/01/70 00:00 | |
| One of many | 01/01/70 00:00 | |
| On a similar note | 01/01/70 00:00 | |
| No coupling | 01/01/70 00:00 | |
| Very nice... | 01/01/70 00:00 | |
| Easy if they have a screw adjustment + web cam | 01/01/70 00:00 | |
It remembers me... | 01/01/70 00:00 | |
| huh? | 01/01/70 00:00 | |
| Just different location of screw adjustmenton clock pendulum | 01/01/70 00:00 |