Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Logic circuit with a test capability










Image Number 7 for United States Patent #4424581.

A flip-flop circuit receives a portion of a multiple bit output from a combinational logic circuit to be tested, and feeds back a plurality of bits to comprise a portion of the multiple bit input to the combinational logic circuit. The flip-flop circuit includes a plurality of master and slave flip-flops with the master flip-flops being operable in parallel to receive the output from the combinational logic circuit or in series as a shift register, and the slave flip-flops being operable either in parallel to receive outputs from the master flip-flops or in series as a shift register. The occurrence of a fault in a combinational logic circuit can be determined by examining the contents of either the master or slave flip-flops at a particular clock cycle.








 
 
  Recently Added Patents
Image forming apparatus, control method and computer-readable medium for stopping a print job during printing by a printer
Data unit receiver and sender control method
Multi-wired antenna for mobile apparatus
Optical switching device and communications system
Methods and systems for distributing broadcast messages on various networks
Method and system for shared high speed cache in SAS switches
Method for manufacturing a magnet coil configuration using a slit band-shaped conductor
  Randomly Featured Patents
Vehicle luggage carrier
Developing apparatus, apparatus unit, and image forming method
Ultrahard sintered carbide particles in hardfacing for earth-boring bit
Dynamic multimedia document
CFTR genes and proteins for cystic fibrosis gene therapy
Wind direction indicator
External aquarium filter
Method and apparatus for obtaining marketing information through the playing of a maze based game
Method of making permanent magnets and product
Circular pegboard strategy game