Sense amplifier circuit for data read=out from memory

摘要

The data are read-out from a selected memory cell (31) coupled to a selected bit line (33). The circuit comprises a capacitor (12), whose one end is coupled to earth and whose capacity is larger than that of a parasitic capacitor (32) of the selected bit line. A current supply portion (34) feeds simultaneously a current to the selected bit line and to the other end of the first capacitor for increasing the potentials of the selected bit line and the other end of this capacitor. A differential amplifier (2-5) determines the data read-out from the memory cell by comparison of the increased potentials and by setting the bit line voltage to a level, at which no current flows.