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
Automated difference recognition between speaking sounds and music
Methods and systems for temporarily sharing position data between mobile-device users
Remote management of networked systems using secure modular platform
Systems and methods for assigning a template to an existing network configuration
Process for the preparation of ethylene homopolymers or copolymers in a high-pressure reactor controlled by a model based predictive controller
Epitaxial substrate for electronic device, in which current flows in lateral direction and method of producing the same
Process for recovering and recycling an acid catalyst
  Randomly Featured Patents
Liposome containing immunotherapy agents for treating IgE mediated allergies
Tool for installing threaded knives with lock nuts
Heat-sensitive recording paper having an overcoat layer formed from an aqueous crosslinkable resin dispersion
Motor/gear-train drive unit, particularly motor-vehicle power-window drive
Polymers from phenylterephthalic acid
Golf ball locator
Surfactant-free cleaning compositions and processes for the use thereof
Adhesive of epoxy resin, amine-terminated ban and conductive filler
Air diffuser
Bulkhead for dividing a cargo container into two compartments