Have you ever wondered how to get the lowest distortion out of an LM13700? Well i did, and now i regret it! i spent the entire summer ripping apart circuits, rebuilding them, scratching my head, building them again, and smacking the test equiptment until i finally understood what was going on under the hood. Seriously, it wasn’t healthy for me or my test equiptment. So, as a public service, i am posting the results here, so no one ever has to do this again.
If you are interested in reducing the distortion in the LM13700, CA3080, BA662, BA6110, CA3280, or any other Operational Transconductance Amplifier (OTA), then this is the paper for you. Just click the link above, and you will be on your way to building cleaner VCAs in no time. And, as an added bonus, completely free to all of us, these methods also reduce the temperature drift of gain. Have fun, and as always, best of luck on your builds!