Resources Contact Us Home
Semiconductor memory device having test pattern generating circuit

Image Number 7 for United States Patent #4821238.

A semiconductor memory device comprises an internal circuit including a memory circuit; a test pattern generating circuit; an element for receiving external signals supplied from the outside; and an input switching circuit connected between the test pattern generating circuit and the receiving element, for switching the input supplied to the internal circuit between output signals generating from the test pattern generating circuit and the external signals, the output signals generated from the test pattern generated circuit being input to the internal circuit through the input switching circuit in a test mode, the external signals being input to the internal circuit through the input switching circuit in a usual mode; the test pattern generating circuit, the input switching circuit, and the internal circuit being provided on the same chip.

  Recently Added Patents
Information processing apparatus and method
Fragrance compounds
Power management method for reducing power of host when turning off main monitor and computer system applying the same
Biometric data display system and method
Array substrate including thin film transistor and method of fabricating the same
Primed stem cells and uses thereof to treat inflammatory conditions in joints
Header rail for a shower screen or the like
  Randomly Featured Patents
One-piece roof vent device and methods of constructing and utilizing same
Ignition timing control system for internal combustion engine
Sulfide mineral concentrate bioleaching
System for communication of health care data
Anthraquinone dyes
Treatment of tumors with 5-radioiodo-2'-deoxyuridine
Self programmable shared bist for testing multiple memories
Method for data input on a touch-sensitive screen
Vertical transistor structure for use in semiconductor device and method of forming the same
Relativistic semiconductor plasma wave frequency up-converter with energized portion