Hi S.

As I recall, the title of the text is "Communications Circuits and......,"
either Prentice Hall or McGraw Hill. You might scan their offerings.

I've done what you are looking for before but it has been some time. Source
voltage drives a varacap (to ground) through a resistor. The cathode of the
varacap is then connected in series with the crystal and an adjustable
coil, feeding the base of a Colpitts osc. Add a buffer stage with emitter
follower. If you have a fax number, I can fax a copy of my schematic.

Phil Anderson
Alden McDuffie Consulting.



On Sunday, August 20, 2000 2:55 PM, Saurabh Sinha [SMTP:ssinha@IEEE.ORG]
wrote:
> Hi,
>
> I am looking for a good site on frequency modulation (more theoretical
> site - covering basics) using vericaps (varactors).
>
> Thank you.
>
> Regards,
>
> S. Sinha
> Tel/Fax: (012) 343-4912
> E.Mail: ssinha@IEEE.ORG
> VIsit: http://home.mweb.co.za/si/sinha
> ICQ: 82010326
>
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