From: Jim Thompson
Subject: Re: can measure VCO spectrum in SPICE directly without MATLAB? ( truncation problem)
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Date: Tue, 17 Dec 2002 15:53:30 GMT
NNTP-Posting-Date: Tue, 17 Dec 2002 10:53:30 EST
Organization: Cox Communications
On 17 Dec 2002 06:14:47 -0800,
In Newsgroup: sci.electronics.design,
Entitled: "can measure VCO spectrum in SPICE directly without MATLAB?
( truncation problem)",
Wrote the following:
|I have got VCO output data at different frequncy. (do it by hand...)
|I copy data to a txt file - out.txt (contain time data )
|it shows undesired figure. ( not like a normal VCO spectrum ).
It looks like you're using HSpice, I'm so sorry ;-)
With PSpice, you'd do it in Probe. Limit the Data Range so you don't
include startup and reaching equilibrium; then set Fourier; all these
items are in Plot/Axis Settings/X-axis.
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| Jim-T@analog_innovations.com Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |
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