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公开(公告)号：CA1148263A
公开(公告)日：1983-06-14
申请号：CA364206
申请日：1980-11-07
Applicant: IBM
Inventor： BREWER JAMES A , LOWY JOHN A
Abstract: A high speed readback check of data transferred to a cyclic memory before the data source is lost. The cyclic memory is organized into a number of data blocks, each interleaved with or simultaneously accessible with the other data blocks. Thus, a long data record comprises several data blocks and therefore several cycles of the memory. A readback check of data transferred from a source into the memory is accomplished by writing data into one data block in a first cycle, writing data into another block on the second cycle while reading back the first data block and calculating a check character therefrom, continuing through the writing of the entire record, and reading the last block of written data and calculating the check character, and then comparing the calculated check character with a character calculated from the source data to detect any error before the source of the record is lost.
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公开(公告)号：CA1071689A
公开(公告)日：1980-02-12
申请号：CA255044
申请日：1976-06-16
Applicant: IBM
Inventor： CARMICHAEL JOHN M , HEARD RODERICK S , HEIBEIN HARRY P , LOWY JOHN A , MCCORNACK RICHARD W
Abstract: INK JET PRINTING SYSTEM WITH PEDESTAL SYNCHRONIZATION An ink jet printing system is provided with synchronization facilities including charging, deflecting, and gutter components and a technique is described for referencing synchronizing pulses to a pedestal voltage level to insure that the ink drop stream clears the gutter during synchronization cycles. ,
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公开(公告)号：FR2412137A1
公开(公告)日：1979-07-13
申请号：FR7832879
申请日：1978-11-16
Applicant: IBM
Inventor： LEWIS JAMES D , LOWY JOHN A
Abstract: A charge coupled device (CCD) serial memory has data read from or written into it at a sub-multiple rate of the data rate. The sub-multiple rate is determined by the number of interleaved blocks into which the CCD serial memory is divided.
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