no it's not negative values, cause you've to think in mathematical logic:
- * + = -
- * - = +
+ * + = +
so vtt*GTLref1-value=vtt*GTLref2
for example:
VTT=1.20 V
ideal GTLvalue 0.667% (or 0.67x)...
* = Quadcore needs a bit more max 0.7%
^ =Dualcore needs a bit less max. 0.635%
looking for idealvalue...
GTLref1= * for Quad, ^ for Dual
GTLref2 = ideal GTLvalue
1.2V*0.7x - value = 1.2V*0.667x
value = 1.2*0.7-1.2*0.667 = 1.2*(0.7-0.667) = +33 mV Quadcore
.................................................. ........... = -32mV Dualcore




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