Patent ID: 6466474
Filing Date: 2002-10-15
Classification: G11C

Abstract:
A memory module for storing digital data, the memory module comprising:a plurality of memory cells, each of the memory cells being capable of storing one bit of the digital data; and a voltage source for biasing the memory cells; each of the memory cells comprising: an access transistor electrically connected to a word line and a bit line for receiving the bit from the bit line when the word line turns on the access transistor; a switching circuit electrically connected to the access transistor, wherein the switching circuit turns on or off according to the bit from the access transistor; and a capacitor electrically connected to the switching circuit, wherein the capacitor stores charge supplied by the switching circuit when the switching circuit turns on; and the capacitor stores charge supplied by the voltage source when the switching circuit turns off; wherein when the access transistor turns off, the switching circuit or the voltage source provides charge to the capacitor so as to maintain a voltage level of the capacitor to compensate for charge leakage of the capacitor.