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Subject: Re: sine wave oscillator

Date: 07/05/01 at 10:10 AM
Posted by: John Dunn - Consultant
E-mail: ambertec@ieee.org
Message Posted:

In Reply to: sine wave oscillator posted by Ajit Pachore on 07/04/01 at 10:15 AM:

Hello, Ajit.

I susepect that your tank circuit has insufficiently high Q in the circuit as you have configured it to suppress the harmonics that result from non-linear behavior of your oscillator's circuit elements.

I have e-mailed a circuit to you that may adaptable to your purposes. Please take a look at it and let me know how you fare with it.

The circuit is a Wein bridge oscillator combined with an AGC loop to keep the oscillator elements themselves operating linearly, with no clipping. As shown, it was used at only 1 KHz, but I think it could be reasonably scaled to 400 KHz if the op-amps are fast enough. The TL082 devices that I used may or may not be capable of this, but I thnk that there is a chance worth pursuing.

Good luck.

John Dunn - President
Ambertec, Inc.
ambertec@ieee.org


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