Hi,

I am working on VCO based ADC with cadence IC 6.1.6.

I am doing simulation for veriloga model of VCO connected with veriloga model of phase sampler. My ADC output is continuous waveform (as attached in the figure)

I am doing trans simulation to measure THD, SNDR, ENOB for my ADC.

I went through this post

http://www.designers-guide.org/Forum/YaBB.pl?num=1296932568 to measure the parameters.

My simulation parameters are:

Input: Sin wave of freq 500 KHz ( I know that I have to choose input freq such that clock is not an integral multiple of input freq, but that depends on choosing number of samples)

Clock: 50MHz

My ADC output is continuous waveform

I have few questions regarding the post. I would really appreciate if anyone could help me with my questions.

1) How to choose number of samples.

2) How to determine Input freq.

3) How to set SKIPSTART, SKIPSTOP, STROBEPERIOD.

Please help me with this.

Thanks in advance !!!