Re: Re: [SI-LIST] : Jitter measurement

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From: SHRIPADARAJ AD (adsraj@rediffmail.com)
Date: Tue Mar 20 2001 - 19:57:16 PST


I am simulating an oscillator(a VCO infact) circuit using spectre and hspice. How should I do jitter measurement in such a simulation environment ? I didnot find any material or toolset in Cadence help guide.

Can anyone throw some light on this ?

Thanks and Regards

Shripad

------------- Original Message --------------
David Bengtson <dbengtson@pobox.com> wrote:
To:"Mikhail Matusov" <matusov@squarepeg.ca>
From:David Bengtson <dbengtson@pobox.com>
Date:Tue, 20 Mar 2001 20:11:08 -0500
CC:"si-list" <si-list@silab.eng.sun.com>
Subject:Re: [SI-LIST] : Jitter measurement

Microwaves and RF Magazine Magazine (www.mwrf.com) has a 2 part
article in january 2001 and Feb 2001 that seems to cover this
material. The author is Boris Drakhlis, the title is "Calculate
Oscillator Jitter by using Phase-Noise Analysis"

Dave

On Mon, 19 Mar 2001 17:07:18 -0500, you wrote:

>Paul,
>
>Can you recommend a good source on this jitter mathematics that you
>mentioned? I've been looking for some information on relationship =
between
>phase noise and jitter for a long time...
>
>Thanks,
>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D
>Mikhail Matusov
>Hardware Design Engineer
>Square Peg Communications
>Tel.: 1 (613) 271-0044 ext.231
>Fax: 1 (613) 271-3007
>http://www.squarepeg.ca
>
>
>
>----- Original Message -----
>From: Paul Levin <levinpa@earthlink.net>
>To: Sunil Kumar <sunilb@cdotb.ernet.in>; si-list =
<si-list@silab.eng.sun.com>
>Sent: Monday, March 19, 2001 11:39 AM
>Subject: Re: [SI-LIST] : Jitter measurement
>
>
>> Dear Sunil,
>>
>> Better than either of these would be to get your hands on a good,
>> old-fashioned analog spectrum analyzer. Center your display on
>> the nominal frequency and then decrease your resolution bandwidth
>> (and everything that goes along with it) so that you can see the
>> detail in the first few KHz on either side of the center frequency.
>>
>> You'll have to study up on jitter mathematics and dBc offsets, but
>> once you've got that straight, you can integrate the flanks of your
>> oscillator between any f1 and f2 and determine the likely jitter
>> arising from noise in that frequency range.
>>
>> Paul Levin
>> Senior Principal Engineer
>> Logic Innovations
>> __________________
>
>
>
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