thatsthebadger
Newbie level 4
Hi all, first post here - hope you might be able to help!
I need to design a 10MHz board level oscillator which has a 1/C frequency dependence (i.e. the 'C' will vary). I'm thinking that a relaxation oscillator would do the trick as its output f is proportional to 1/RC. However, the most important performance spec for this application is the output jitter, and I'm wondering a) whether a relaxation oscillator is 'good' for jitter and b) what would be the lowest jitter implementation if it was? I'm thinking perhaps a really fast comparator would be best, but then maybe a low noise, high frequency opamp might also be good? The output will be going into the inputs of a phase detector, and to confirm this is a PCB design with off the shelf parts.
Any suggestions?
I need to design a 10MHz board level oscillator which has a 1/C frequency dependence (i.e. the 'C' will vary). I'm thinking that a relaxation oscillator would do the trick as its output f is proportional to 1/RC. However, the most important performance spec for this application is the output jitter, and I'm wondering a) whether a relaxation oscillator is 'good' for jitter and b) what would be the lowest jitter implementation if it was? I'm thinking perhaps a really fast comparator would be best, but then maybe a low noise, high frequency opamp might also be good? The output will be going into the inputs of a phase detector, and to confirm this is a PCB design with off the shelf parts.
Any suggestions?