In the semiconductor memory device which has nonvolatile memory cells, the bit lines which are typified by high capacitances, are isolated from the input/output nodes of the corresponding sense amplifiers during the amplifying operation of the sense amplifier. A flip-flop circuit, such as a CMOS latch...http://www.google.de/patents/US5978271?utm_source=gb-gplus-sharePatent US5978271 - Semiconductor nonvolatile memory device in which high capacitance bit lines are isolated from sense amplifier input/output nodes during amplifying operation of sense amplifier
