※ 引述《moonshade (翻滾吧！貓咪)》之銘言：
: 既然都這樣說了
: 有空的看看吧...
: This paper presents a greedy refinement technique for IR-drop
: reduction. The authors applied a fast IR drop estimation method
: of a existing work to locate the row with maximum IR-drop, and
(from?) an
: reduces it's IR-drop by moving the cell in that row to other
(to) reduce its cell(s)
: row's with less IR-drop.
rows
: 1.
: a).
: The resistive model for standard cells in this paper is equivalent to
: a VCCS source with
: I = Ps/V + k*V (derived from Equation (4) and (5)
: considering that P=V*I), where Ps is standard power consumption,
: I is the value of the current source,
: V is the voltage difference from power pin and ground pin and
: k is a parameter related to clock rate and etc.. In some situations,
: for example, if the static power consumption larger than dynamic power
is
: consumption, the current will increase while V decrease, which contradicts
decreases ^^^^^for what?
: with the behavior of any existed standard cell.
: b). The resistive model SHOULD not be directed grounded. For constant
: current model the voltage cross a cell and the output current is
,
: independent to each other.
: The current source can be grounded without any problem. But it is not
: the case in the resistive or other any VCCS model. Those resistors
: should connected to both the ground network and the power network.
connect
: Due to the above reasons, the reviewer doubts the accuracy of this model.
: The experimental results should have be verified with commercial tools,
: such as powerrail, voltagestorm, or HSPICE.
: 2. The contribution of this paper is Theorem 1. But it is trivial for
: electronic circuits. Removing a standard cell which consumes current
: will no doubt reduce IR-drop. If removing a standard cell out of a
: row will increase IR-drop, the model of the power/ground network is
: definitely wrong.
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