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Tech Tutorial: Design considerations for 500W Class D automotive subwoofer amplifiers

Output filter design
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The Speaker Guy
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re: Tech Tutorial: Design considerations for 500W Class D automotive subwoofer amplifiers
The Speaker Guy   8/4/2008 5:18:33 AM
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I don't agree that Class AB has a high output impedance. If it is a source (emitter) follower output design, the ZOUT is low, then made even lower by the loop gain. If the output is common source (emitter), then the ZOUT statement is true.

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