Resources Contact Us Home
Memory system which enables storage and retrieval of more than two states in a memory cell

Image Number 7 for United States Patent #5808932.

A memory circuit which enables storage of more than two logic states in a memory cell. Since the additional logic states may be used to represent additional information bits, this memory circuit increases the number of bits that may be stored per memory cell, thereby increasing the storage density and reducing the cost per bit. The disclosed memory circuit comprises an analog-to-digital converter coupled to detect a current through a transistor in a memory cell. The current is determined by a charge stored on the transistor's gate. By enabling the current to be detected in discrete increments, it becomes possible to represent more than one bit of information with the charge stored in the memory cell. Usage of additional increments necessitates more precise storage and detection circuitry. In one embodiment, the storage circuitry uses feedback to obtain a greater logic state retrieval accuracy.

  Recently Added Patents
Dynamic web page construction based on determination of client device location
Area efficient through-hole connections
Gaming machine certificate creation and management
Method and apparatus for organizing segments of media assets and determining relevance of segments to a query
Disk array apparatus and firmware update method therefor
Information repository search system
Printed wiring board with reinforced insulation layer and manufacturing method thereof
  Randomly Featured Patents
Fishing lure
Programming interface with an unwrapped 2D view of a stimulation lead with complex electrode array geometry
Aromatic monovinyl alkenyl alphaolefin anhydride terpolymers
Temperature-sensitive and cold-adapted human parainfluenza virus type 2 (HPIV-2) and vaccines based on such virus
Toe kick end cap for cabinets
Illuminant color detection
Topical nepafenac formulations
Counter attachment for product dispensers
Automated utility meter reading system with variable bandwidth receiver
Power control in orthogonal sub-channels in wireless communications