Abstract: In a static semiconductor memory device including first and second power supply lines for a first voltage, a third power supply line for a second voltage, first and second nodes, and first and second drive transistors connected between the first and second nodes and the third power supply line, a first load resistor is connected between the first power supply line and the first node, and a second load resistor is connected between the second power supply line and the second node.

Abstract: A system collects fluid waste within a closed waste vessel where a waste disposal cycle is determined based upon the pressure level within the waste vessel. In the preferred embodiment, a closed liquid waste vessel accepts waste solutions through conduits having valves controlling conduit fluid communication with treatment vessels. A pressure sensor determines the level of pressure within the waste vessel. A pressurizing device reduces the level of pressure within the vessel. When the pressure within the vessel is lowered to a predetermined level, the valve is opened. When the pressure sensed within the liquid waste vessel then rises above an appointed value, the valve is closed, completing the waste collection of a treated sample. This corresponds to the point in time when the treatment vessel is empty, allowing a sudden rush of air into the waste vessel, raising the vessel pressure to ambient and closing the valve.