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Method and circuitry for correcting errors in recirculating memories

  • US 4,365,332 A
  • Filed: 11/03/1980
  • Issued: 12/21/1982
  • Est. Priority Date: 11/03/1980
  • Status: Expired due to Term
First Claim
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1. A method for detecting and correcting bit errors in binary data circulating from the output terminal into the input terminal of a first recirculating memory, said method including the steps of:

  • sampling the data bits circulating from the first memory and storing said bits in a second recirculating memory operating in synchronization with the first memory;

    comparing the state of each stored bit circulating from the second memory with the next bit occupying the corresponding location in the first memory as the next corresponding bit circulates from said first memory;

    generating an error detection signal whenever the state of said stored bit differs from that of the next corresponding bit;

    reversing the state of the next corresponding bit in response to said error detection signal; and

    inserting said reversed state next corresponding bit into the data circulating from the first memory at the next recirculating bit location of the next corresponding bit.

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