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
Communication apparatus, power supply control method, display apparatus, communication method, and computer program product
Toothbrush holder
MOS transistor having combined-source structure with low power consumption and method for fabricating the same
Data processor with virtual machine management
System and method for providing location and access network information support in a network environment
Quantifying the risks of applications for mobile devices
Ignition device in particular for an internal combustion engine, and method for manufacturing same
  Randomly Featured Patents
Garlic press
System and method for efficiently transferring data from an electronic camera device
Production method of composite material and composite material produced by the production method
Sleeping mattress
Reversible gerotor pump
Radiation detecting apparatus and method for manufacturing the same
Surgical cushion for cooling an organ
Auger press
System and method for making an applique
Arrangement and a method for recirculation of exhaust gases of an internal combustion engine