System for monitoring the validity of electrical data fed to a number of n functionally parallel-connected data channels
Railway control signal interlocking systems
Fault tolerant computational system and voter circuit
Dual-channel data processing system for railroad safety purposes
Majority vote circuit
Multi-channel redundant processing systems Patent #: 4497059
ApplicationNo. 06/695636 filed on 01/28/1985
US Classes:714/797, Majority decision/voter circuit714/821Transmission facility
ExaminersPrimary: Fleming, Michael R.
Attorney, Agent or Firm
International ClassesG06F 11/18 (20060101)
G06F 11/36 (20060101)
AbstractA multi-channel redundant processing system having tightly synchronized redundant processor channels wherein one or more additional processors are connected to each of the redundant channels, the redundant outputs being supplied to such additional processors to permit different processing operations to be performed on such redundant outputs. A selected number of added processors can perform the same processing operations and the processed outputs can be supplied to the redundant processor channels to establish a selected degree of reliability while one or more other added processors can be used to perform other processing operations on the redundant outputs in a non-redundant manner. Further, such added processors can be used to detect software programs fault situations in which multiple versions of software programs are used.