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介绍补偿NE5539 SE5539运算放大器闭环增益的方法
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2009-06-04
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The Philips Semiconductors NE/SE5539 ultra-high frequency
operational amplifier is one of the fastest monolithic amplifiers made
today. With a unity gain bandwidth of 350MHz and a slew rate of
600V/ms, it is second to none. Therefore, it is understandable that to
attain this speed, standard internal compensation would have to be
left out of its design. As a consequence, the op amp is not
unconditionally stable for all closed-loop gains and must be
externally compensated for gains below 17dB. Properly done,
compensation need not limit slew rate. The following will explain
how to use the methods available with the NE/SE5539.
operational amplifier is one of the fastest monolithic amplifiers made
today. With a unity gain bandwidth of 350MHz and a slew rate of
600V/ms, it is second to none. Therefore, it is understandable that to
attain this speed, standard internal compensation would have to be
left out of its design. As a consequence, the op amp is not
unconditionally stable for all closed-loop gains and must be
externally compensated for gains below 17dB. Properly done,
compensation need not limit slew rate. The following will explain
how to use the methods available with the NE/SE5539.
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