| ??? 10/03/05 18:47 Read: times |
#101862 - Right. Responding to: ???'s previous message |
What i mean is an oscilattor that i can control with a CC voltage, or perhaps it could be a circuit that i can control in some other way (like i said, adding capacitance to a tank circuit or something) of course this is not voltage controlled, but "capacitance controlled".
I have seen a circuit where the XTAL that is conected to the MCU have a CAP conected to a XTAL pin and to a MCU pin. When this pin is driven input(hi-z) or output, the capacitor is connected to GND or not connected at all. Thus making the running frec, alternate betwewn to values. I need something like this but with more resolution, and running about 20Mhz. I think the best way is go to a VCO driver by a DAC, but perhaps someone have some other idea. Regards Robert. |
| Topic | Author | Date |
| MCU based VCO ?? | 01/01/70 00:00 | |
| VCO | 01/01/70 00:00 | |
| Right. | 01/01/70 00:00 | |
| There you go again | 01/01/70 00:00 | |
| Continous Current.... | 01/01/70 00:00 | |
| Acronyms away ! | 01/01/70 00:00 | |
| Thanks.... | 01/01/70 00:00 | |
| I can answer that | 01/01/70 00:00 | |
| CC ?? yes yes | 01/01/70 00:00 | |
| Of course.... | 01/01/70 00:00 | |
| maths | 01/01/70 00:00 | |
| More details needed | 01/01/70 00:00 | |
| Answers... | 01/01/70 00:00 | |
| 74HC4046 at Vcc=6V | 01/01/70 00:00 | |
| Sounds nice... | 01/01/70 00:00 | |
Interference due to sitting in same p. | 01/01/70 00:00 |