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
Electrostatic charger and image forming apparatus
Photovoltaic system with integrated photovoltaic panel and battery
Dynamic rebasing of persisted time information
Delay interferometer using magneto-optic effect of a variable faraday rotator
System and method for providing advice to consumer regarding a payment transaction
Instantaneous single click perpetual date mechanism
  Randomly Featured Patents
Method and apparatus for sharpening scalloped-edge blades
RJ modular connector having printed circuit board having conductive trace to balance electrical couplings between terminals
Closure for container
Subbing layer for antistatic layer on dye-receiving element used in thermal dye transfer
Piezo electric relative motion sensor
Vertical counterflow evaporative cooler
Card processor
Arrangement comprising a magnetic-tape-cassette apparatus with a deck and with a loading mechanism for magnetic-tape cassettes
Delivery system and method for deploying an endovascular prosthesis
Method of making chalogenide memory device