# Phase Difference calculation in cadence.

1. ## Phase Difference calculation in cadence.

Hi,

I am degining a phase shifter in Cadence. I have to find phase difference between two transient waves. I am unable to do it. Can anyone please help me.

Thank you

•

2. ## Re: Phase Difference calculation in cadence.

Originally Posted by Nancy12345
I am degining a phase shifter in Cadence.

•

3. ## Re: Phase Difference calculation in cadence.

For waveforms A & B, create a zero-crossing detector (of upward-going transition).

1) Test begins when waveform A crosses zero. Set timepoint=0.
2) Wait until waveform B crosses zero. Detect timepoint.
3) Test ends when A again crosses zero. Detect timepoint.

To determine phase difference, calculate where a zero-crossing of B occurs between two crossings of A.

•

4. ## Re: Phase Difference calculation in cadence.

What's the actual problem? Verification of your "phase shifter" or designing a phase or flight time measurement system?

Does your "phase shifter" produce frequency independent phase shift, frequency independent delay, or something else (any kind of frequency dependent phase respectively group delay)?

What's the nature of the "transient wave" applied to it, bandwidth, waveform?

--[[ ]]--