OpAmp
Member level 3
Hi,
I have designed a fully differential (FD) ring oscillator. It has a fairly decent phase noise. I need to convert the FD output of the oscillator to singe-ended (SE). When I use a simple diff pair to do that the phase noise at high frequencies degrades considerably. In other words, the phase noise at the output of the oscillator (input of the FD-to-SE is still good), but the phase noise at the output of the FD-to-SE converter is not good at high frequencies.
I was wondering is there a good FD-to-SE converter which does not add much phase noise/jitter?
Thanks
I have designed a fully differential (FD) ring oscillator. It has a fairly decent phase noise. I need to convert the FD output of the oscillator to singe-ended (SE). When I use a simple diff pair to do that the phase noise at high frequencies degrades considerably. In other words, the phase noise at the output of the oscillator (input of the FD-to-SE is still good), but the phase noise at the output of the FD-to-SE converter is not good at high frequencies.
I was wondering is there a good FD-to-SE converter which does not add much phase noise/jitter?
Thanks