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
System and method for access of user accounts on remote servers
High productivity single pass scanning system
Mobile terminal based on W-CDMA system having receive diversity function and system thereof
Non-volatile memory cell containing a nano-rail electrode
Adjustable voltage regulator with dynamic voltage compensation
Floribunda rose plant named `KORamflusa`
Toner cartridge and image forming apparatus including the same
  Randomly Featured Patents
Nut cracking device
Process for preparing ammine salts of aluminum iodide
Image processing apparatus, image reading apparatus, image formation apparatus, control method thereof, and storage medium
Control method for direct current motor
Preparation of high solids, low viscosity carbonless paper gelatin base microcapsules
Combined ultrasonic and rotating eddy current probe and method of non-destructive testing of materials
Fiber optic multi-port organizer
Cross stretch measuring system
Methods and apparatus for wellbore construction and completion
Precision article molding methods and apparatus