Questions about SAS coefficients' configuration

Yupengfei (B) yu.yupengfei at hisilicon.com
Mon Mar 16 19:50:05 PDT 2015


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Hi All,

I have questions needing your help.

In SAS-3R06¡¯s Figure 131 -- ¡°Minimum and maximum coefficient ranges at
maximum peak to peak voltage¡±,

it defines the minimum range and maximum range of C1 and C3 with different
Vpp_noeq.

Question 1:

Whether the value of C1 and C3 is the total value surrounding by the purple
solid line when Vpp_noeq = 1200mv?

If so, does it mean the value of C1 and C3 in purple solid line satisfied
equation ¡°VMA>=80mv¡± when Vpp_noeq=1200mv?

Question 2:

Do we need a constraint like ¡°C2-|C1|-|C3|>=Fixed Value¡± to ensure
¡°VMA>=80mv¡± when Vpp_noeq is variable between 850mv and 1200mv?

If yes, when we constraint ¡°C3>=-0.3¡± and ¡°C1>=-0.15¡±(the range
surrounding by the red dotted line shown in Figure 131, which is the minimum
range we should support), we do not need the constraint ¡°C2-|C1|-|C3|>=Fixed
Value¡± or any other constraint of C2 to ensure the minimum value of VMA,
right?

Best Regards,

Pengfei Yu

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