Virtuoso Spectre Circuit Simulator RF Analysis User Guide

7. Click Plot.
Virtuoso Spectre Circuit Simulator RF Analysis User Guide
Modeling Transmitters
Cycle to cycle jitter for the 581.5p event time displays.
In the Direct Plot form, make the following changes.
1. Highlight Append for Plot Mode.
2. In the Event Time cyclic field select 187.3p.
3. Click Plot.
Cycle to cycle jitter displays for both event times.
Jitter at the up and down crossings is very close. The primary difference is the amount of
noise at the lower frequency range, which does not matter after integration. In addition, the
slope at the crossing, which we are using, is slightly different.
The Integration Limits display at the bottom of the Direct Plot form. In this instance the Start
Frequency is 10 Hz and the Stop Frequency is 500M Hz.
Plot Jc for Both Event Times
In the Direct Plot form, plot Jc jitter.
1. Highlight Replace for Plot Mode.
June 2007 549 Product Version 6.2