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
Detection of procedural deficiency across multiple business applications
Tricyclic inhibitors of kinases
Compression molding method and reinforced thermoplastic parts molded thereby
Control apparatus for autonomous operating vehicle
Liquid crystal display wherein the data lines covered by each pixel electrode are supplied with data signals of opposite polarities
Resin composition and molded article
Method and apparatus for communicating electronic service guide information in a satellite television system
  Randomly Featured Patents
Inflatable floating chair
Dual capacity hook-lift hoist
Electrical load disconnection detecting apparatus
Treatment of non-hodgkin's lymphomas with multi-arm polymeric conjugates of 7-ethyl-10-hydroxycamtothecin
Method and system for active profile server
Seat cushion and back pad of a chair
Microwave heat treating of manufactured components
Portable phone
Abnormality diagnosis apparatus for internal combustion engine
Orthodontic implement controllable of correction force