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

Image Number 2 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
Non-volatile semiconductor memory and data processing method in non-volatile semiconductor memory
Apparatus for preventing overcharge of a battery
Snap-engagement structure
Crystalline form of (R)-7-chloro-N-(quinuclidin-3-yl)benzo[b]thiophene-2-carboxamide hydrochloride monohydrate
Magnetoresistive element and manufacturing method of the same
Circuit arrangement having a load transistor and a voltage limiting circuit and method for driving a load transistor
Forming agent for gate insulating film of thin film transistor
  Randomly Featured Patents
Portable cooking and heating stove
Multi-color pad printing apparatus and method
Method for indirect Ion implantation of oxide superconductive films
Semiconductor memory device for storing data comprising of plural bits and method for operating the same
Mismatch endonuclease and its use in identifying mutations in targeted polynucleotide strands
Coriolis mass flow meter
Combination continuously variable transmission and planetary transmission
Packaged food article
Antioxidant dispersant polymer dendrimer
Epichlorohydrin-based flexible elastomer composition