OPTIMIZED CHARGE SHARING FOR DATA BUS SKEW APPLICATION

摘要

PROBLEM TO BE SOLVED: To provide a charge sharing function during skewed data bus conditions in an integrated circuit memory. SOLUTION: The charge sharing circuits are coupled to each of capacitive lines in a charge sharing line set to provide a charge recycling function. An extra clock signal becomes active one cycle earlier during a first clock period to trigger an extra drive circuit to generate a voltage difference on a first capacitive line. An extra voltage signal on the first capacitive line takes place earlier than usual and allows for appropriate charge sharing between a second capacitive line and the first capacitive line. Also, an auxiliary control signal triggers a reference reading circuit to generate data and a voltage on the first capacitive lines similar to a voltage present among real data for the appropriate charge sharing. The auxiliary reading and driving circuit blocks are partial copies of the normal reading and driving circuits so that a matching voltage can be generated on an appropriate capacitive signal lines. COPYRIGHT: (C)2008,JPO&INPIT