Posted by Wayne Parham [ 64.216.178.200 ] on November 14, 2004 at 22:13:49:
In Reply to: What is a posted by wunhuanglo on November 13, 2004 at 09:12:24:
Hi Charlie,
Check out the Tripath data sheets for typical applications, because they will kind of show you what they're doing. It achieves efficiency like a switching supply, only the signal that's switched is the audio signal. The output is a high-current digital pulse train approximation of the input signal. It is sampled at a very high rate so the pulse train is a close approximation. Summing to provide D/A conversion is done in the output circuit.
Wayne
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