We control the delay by selecting the r_sel <3:0> bit. When changing the control variable inputs will change the amount of the buffer that the electric current running through it. Each block there are 2 path with the disparity in turn is 2, 4, 8, 16 buffer, so a step delay value is 2 x (buffer delay) = 2x170 = 340 (ps). For example: We have: Delay of path0 = tdb0\Delay of path1 = tdb1\r_sel <3:0> = 1001 = 9 \So we have a difference of delay between two path is: tdl1-tdl0 = 9 x 170 = 1530 (ps). \
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