A symmetrical, flat laminate structure used to minimize variables in a test structure to experimentally gauge white bump sensitivity to CTE mismatch is disclosed. The plunger may have a lip within the fluid path spaced above the central orifice. Further, the base station delays the CDMA burst signal for a delay time equal to the time necessary for the detection of the timing. Likewise, if there is at least one defective column element contained within the second micro-cell, then the column redundancy apparatus generates an internal column address corresponding to the at least one defective column element in the second micro-cell. Further, the integrator is able to integrate both positive and negative input signals regardless of their magnitude.