Noise Shaping Sigma Delta DACs - ESS Technology, Inc.
Noise Shaping Sigma Delta DACs - ESS Technology, Inc.
Noise Shaping Sigma Delta DACs - ESS Technology, Inc.
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The Trick is “<strong>Noise</strong> <strong>Shaping</strong>”<br />
• This method of making the error average out to zero is<br />
called “<strong>Noise</strong> <strong>Shaping</strong>”<br />
– It is so called because it does not just ignore the quantization<br />
noise: it keeps track of it, and reduces the average to zero<br />
• In the “Gas Price” example, the cashier adds up the error<br />
and gives you back a penny every now and again to stop<br />
the error accumulating<br />
ΣΔ/HyperStream 10 of<br />
44
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