• Wafer Integrated Semiconductor Mass Memory

      Geiderman, William A.; Solomon, Allen L.; McDonnell Douglas Corporation (International Foundation for Telemetering, 1978-11)
      This paper describes a light-weight, small-volume, low-power semiconductor mass memory which will provide high reliability operation in a variety of environments. The memory employs two new technologies: adaptive wafer scale integration where large numbers of memory arrays are interconnected on the wafer substrate using nonvolatile latching circuits; and a nonvolatile charge-coupled device memory element. The nonvolatile charge-coupled devices and peripheral circuitry are fabricated on a single silicon substrate using metal-nitride-oxide-semiconductor (MNOS) transistor structures. The adaptive latching circuits enable malfunctioning arrays to be replaced in situ by spare arrays which are available on the wafer substrate through the use of error detection/ correction circuitry. The paper also describes a specification for a spaceborne mass memory system including peripheral circuits. A memory system with a gigabit data storage capacity (total active storage elements = 1.2 gigabits can be fabricated within 0.6 cubic feet at an estimated weight of 26 pounds.
    • The Wide-Band Signal Processor

      Stiffler, J. J.; Raytheon Company (International Foundation for Telemetering, 1978-11)
      The Wide-Band Signal Processor (WBSP) is a spaceborne communications processor designed to operate as a peripheral to the Fault-Tolerant Spaceborne Computer (FTSC) currently being developed for the U. S. Air Force. Its function is to demodulate and decode received FDM and TDM signals and to re-encode the recovered information and use it to modulate signals for retransmission. The major difference between the WBSP and other processors designed to perform similar functions is in the fact that the WBSP, like the FTSC itself, is designed to survive its own hardware malfunctions.