By Lamar West, Scientific-Atlanta, Inc.

CATV system performance has become extremely important in recent times. Previous amplifier technologies have proven inadequate to meet the new performance demands required for competitive system operation. Feedforward technology has matured so that it can now meet these performance demands while offering reliable system operation.

Previous attempts at feedforward have been unable to operate at a sufficient level of reliability to make them practical. One of the most devastating factors limiting reliability was thermal variations. This application note deals with this problem and presents the manner in which modern single hybrid approaches have eliminated it.

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