ywguo
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neoflash,
I guess a and b all independent inputs. Y is the output. As the quantized output Y is not fed back to the input, the quantization noise is not modulated actually. What I have derived is shown below.
Y(Z)=a(Z)(z-1/(1-z-1)) + E(Z); if Y(Z-1)<0 Y(Z)=b(Z)(z-1/(1-z-1)) + E(Z); if Y(Z-1)>0
Yawei
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