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Coaxial_line_driver

2014-11-22 23:41  
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Coaxial_line_driver
This circuit shows a 9911 used to drive long coaxial lines in a 50- or 75-Ω system, such as those found in test equipment and other applications. The 9911 is a high-current voltage follower and, in this application, is capable of driving long cables (and thus large capacitances) without instabilities. Remember that the 9911 provides 0.96 gain, which can drop to 0.90 when the chip is heavily loaded. RL should match the cable impedance (typically 50 or 75Ω).