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App note: Driving capacitive loads fast by paralleling op-amps and transmission lines

Posted on Sunday, December 9th, 2012 in app notes by DP

Here’s a video from Linear Technology describing how to drive capacitive loads fast. The proposed solutions is to use multiple op-amps in a parallel configuration to achieve the high-speed requirements.

Certain video and other technologies require driving planar conductive surfaces fast. Unfortunately, the surfaces can have high capacitance, which means that driving them fast takes high currents. This complicates the amplifier design but the situation extends beyond just the amplifier. Between the amplifier and the capacitive load, there is necessarily some length of transmission line.

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