Resources Contact Us Home
Peripheral unit controller

Image Number 6 for United States Patent #4428044.

A synchronization scheme is used in a peripheral unit controller which consists of two duplicated units whose outputs are matched. In addition, each duplicated unit contains a pair of microprocessors whose outputs are also matched. The synchronization scheme allows each microprocessor to run its own diagnostics independently, and to synchronize itself with the other microprocessor of the pair. After the synchronization occurs in both microprocessor pairs, the duplicated units are synchronized. Synchronization is achieved by using a real-time clock and the interrupt structure of each microprocessor.

  Recently Added Patents
Hermetically sealed atomic sensor package manufactured with expendable support structure
Electrical converter with variable capacitor
Automobile body
Surveillance apparatus and method for wireless mesh network
Image forming apparatus and method
Systems and methods for sorting particles
Printing control method and printer for printing on a label
  Randomly Featured Patents
Electroactive biopolymer optical and electro-optical devices and method of manufacturing the same
Method for fabricating flash memory device having vertical floating gate
Data exchange processor for distributed computing system
Vehicle frame for trailer coupler system
Semiconductor memory device having netlike power supply lines
Method for mapping logic design memory into physical memory devices of a programmable logic device
Cancer diagnosis and therapy based on mutations in TGF-.beta. receptors
Mass flowmeter
Breath mint dispenser
Security device