DATA SENSING APPARATUS OF FLASH MEMORY

摘要

PURPOSE: In order to prevent the malfunction resulting from reduction of a sensing range, a data sensing apparatus of a flash memory is provided to sense a voltage level and varying a sensing range based on the source voltage variations while reading the data stored in a cell array of the flash memory. CONSTITUTION: The data sensing apparatus comprises a main cell load element(35) for controlling the load of a main cell bias element(25) for biasing a main cell(15), a reference cell load element(30) for controlling the load of a reference bias element(20) for biasing a reference cell(10), a source voltage sensor(60) for sensing a voltage level of source voltage, a load controller(40) for controlling a load value of the reference cell load element based on a sensing value of the source voltage sensor and a control signal, and sense amplifier(50) for sensing and determining the difference of the currents flowing in the reference cell bias element and in the main cell bias element.