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Subject: Re: OpAmp stability when driving transistor load

Date: 04/21/03 at 5:44 PM
Posted by: Sidney Chi
E-mail: sidney.chi@qualitau.com
Message Posted:

In Reply to: Re: OpAmp stability when driving transistor load posted by Russ Kincaid on 04/18/03 at 1:21 PM:

Hello,
thank for the info.
There are addition info which I haven't mention that might be of importance. The cable I am using has 10 twisted pair conductors. Each of the pair is connected to one opamp and loaded with one transistor. Oscillation doesn't occur when only one transistor is loaded, but there are oscillation when there is more than one transistor connected. Could there be interference between pairs within the cable? How can I fix the oscillation? Could the solution you mention (50 ohm in series with each of the conductor) applies here also?

thanks for your help.
Sidney


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