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Article: Decompensating amplifiers improve performance.
- Article from:
- EDN
- Article date:
- December 3, 2007
CopyrightCOPYRIGHT 2007 Reed Business Information, Inc. (US). This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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by Walter Bacharowski, National Semiconductor
Manufacturers offering unity-gain-stable amplifiers hope to address a wide market and minimize the effort of learning to use the device. Yet these vendors sacrifice a significant portion of the potential ac performance. Learn when to consider decompensated amplifiers and what they can offer you.
Designers often want to minimize amplitude error in sensor-based systems. This goal often leads to specifying the gain error of an amplifier's closed-loop gain over the frequency range of the sensor. Engineers commonly specify the bandwidth of an amplifier in terms of its -3-dB frequency, but, from a gain-accuracy ...