gaom9
Full Member level 4
Hi,
I am working in a Δ-Σ Fractional-N Frequency Synthesizers, and I want to get some advice about the result of it.
This Δ-Σ Fractional-N Frequency Synthesizers is design for blue-tooth, and I run a 50us tran simulation with reltol 1e-4,vabstol 1e-6, iabstol 1e-12 and conservative setting, the output frequency is set to be 2.450GHz, and here is my result:
output frequency vs time
zoom in figure of the output frequency, and the output dither is about 300k(can this be reduced if I imcrease the tolerances?)
the dft result of the VCO output signal
How about my result, please? And are there any other simulation should I do to analyse it, please?
What should I do next, please? Please give me some advice.
Thank you.
Best regards!
I am working in a Δ-Σ Fractional-N Frequency Synthesizers, and I want to get some advice about the result of it.
This Δ-Σ Fractional-N Frequency Synthesizers is design for blue-tooth, and I run a 50us tran simulation with reltol 1e-4,vabstol 1e-6, iabstol 1e-12 and conservative setting, the output frequency is set to be 2.450GHz, and here is my result:
output frequency vs time
zoom in figure of the output frequency, and the output dither is about 300k(can this be reduced if I imcrease the tolerances?)
the dft result of the VCO output signal
How about my result, please? And are there any other simulation should I do to analyse it, please?
What should I do next, please? Please give me some advice.
Thank you.
Best regards!
