Puppet123
Full Member level 6
I want to measure the SNDR and SFDR of a sample and hold.
The clocks are at 2GHz. Input Frequency is 50MHz.
For coherent sampling to calculate this in Cadence Spectre for the DFT
fin=K*FS/N.
So I pick k=1023, N=2048, FS=2GHz. Then FIN = 999.0234375MHz.
Then run the simulation for 2048/FS or 1.024uS.
Calculate the DFT on this waveform.
What strobe period do I put in the transient options ? 2G/2048 ?
Is this the correct approach ?
The clocks are at 2GHz. Input Frequency is 50MHz.
For coherent sampling to calculate this in Cadence Spectre for the DFT
fin=K*FS/N.
So I pick k=1023, N=2048, FS=2GHz. Then FIN = 999.0234375MHz.
Then run the simulation for 2048/FS or 1.024uS.
Calculate the DFT on this waveform.
What strobe period do I put in the transient options ? 2G/2048 ?
Is this the correct approach ?
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