资料介绍
OA-20_current feedback myths debunkedCurrent-Feedback Myths Debunked
Current-Feedback Myths Debunked
Introduction
Mystery needlessly surrounds the operation and use of current feedback operational amplifiers. Many engineers refuse to design with these op amps due to misunderstandings which are easily rectified. Much has been written to date on the internal circuitry of current feedback op amps. These open-loop “tutorials” obfuscate how current feedback works in a closed-loop circuit. Practical op amp circuits are closed-loop feedback systems which yield to classical control theory analysis. Analog circuit designers are comfortable with voltage feedback op amps in a closed-loop circuit and with the familiar ideal op amp approximations feedback affords. It will be shown that current feedback op amps can be analyzed in an analo