Abstract: A device includes a memory array, bit line pairs, word lines, a modulation circuit and a control signal generator. The memory array has bit cells arranged in rows and columns. Each bit line pair is connected to a respective column of bit cells. Each word line is connected to a respective row of bit cells. The modulation circuit is coupled with at least one bit line pair. The control signal generator is coupled with the modulation circuit. The control signal generator includes a tracking wiring with a tracking length positively correlated with a depth distance of the word lines. The control signal generator is configured to produce a control signal, switching to a first voltage level for a first time duration in reference with the tracking length, for controlling the modulation circuit. A method of controlling aforesaid device is also disclosed.

Abstract: A device includes a memory array, bit line pairs, word lines, a modulation circuit and a control signal generator. The memory array has bit cells arranged in rows and columns. Each bit line pair is connected to a respective column of bit cells. Each word line is connected to a respective row of bit cells. The modulation circuit is coupled with at least one bit line pair. The control signal generator is coupled with the modulation circuit. The control signal generator includes a tracking wiring with a tracking length positively correlated with a depth distance of the word lines. The control signal generator is configured to produce a control signal, switching to a first voltage level for a first time duration in reference with the tracking length, for controlling the modulation circuit. A method of controlling aforesaid device is also disclosed.

Abstract: The present invention relates to a process for preparing open-cell microcellular polystyrene foam by adding suitable polyamide as nucleating agent into the process to produce polystyrene foam having microcellular open-cell. The process comprises the steps of blending polystyrene and a polyamide polymer to give a homogeneous mixture, adding a foaming agent into the mixture and blending to give a polymer foaming solution, and finally extruding and foaming the polymer foaming solution in an extruder. The present invention also relates to the open-cell microcellular polystyrene foam prepared by the process.

Abstract: The invention provides open-cell microcellular polystyrene foams and a method for making the same. The method includes: adding a mixture comprising polystyrene and 8˜14 wt % of additive agent to a double screw extruder for blending; adding the blended mixture with a 2.0˜5.1 wt % of foaming agent to a single screw extruder for blending and foaming to obtain polystyrene foam. Average cell size of the polystyrene foam is equal to or less than 60 &mgr;m. Open cell content of the polystyrene foam is equal to or greater than 60%.