Fast-sensing amplifier for flash memory

(57) The high-speed detection amplifier for flash memories which consists of floating gate memory apparatus of summary plurality, and has the column line alternatively combined with the memory apparatus is indicated. A column line is discharged to a ground, before reading bias / amplifying circuit carries out the pull-up of the column line to the reading bias potential in a quickly specific memory apparatus. This potential is compared with detection standard potential by the differential amplifier in a high-speed detection amplifier. The binary state of a memory apparatus specific as an output of a high-speed detection amplifier is given.