Arrangement in a data processing system to reduce the cycle time

Details Arrangement in a data processing system to reduce the cycle time Arrangement in a data processing system to reduce the cycle time

1982-02-26

1984-11-06

Zache, Raulfe B.

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G06F 104

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044815751

ABSTRACT:
The cycle time of a data processing system should always be determined in such a manner that data from a source register, after having been propagated through, if necessary, several transfer sections and line drivers, and through a chain of logic circuits for the respective processing steps, can be stored in the result or sink register safely and even with the worst case propagation tolerance of all elements involved. The ideal cycle time therefore, which is dependent on the processing speed of the slowest chain of logic circuits, has to have added time segments for the worst case of unprecise clocking.
A reduction of the cycle time by the above mentioned added time segments, and if necessary by the propagation delays in the transfer sections and in the line drivers, is achieved when the chain of logic circuits and thus its delay time is divided into two partial chains with the partial delays and if the sink register is arranged between the two partial chains. By thus splitting the chain of logic circuits into two partial chains, the logic partial functions can be executed during that time segment which is composed of the above mentioned added time segments.

REFERENCES:
patent: 4110822 (1978-08-01), Porter et al.
patent: 4187539 (1980-02-01), Eaton
patent: 4270181 (1981-05-01), Tanakura et al.
patent: 4305124 (1981-12-01), Marro et al.
"Effective Pipelining of Digital Systems", J. R. Jump et al., IEEE Transactions on Computers, vol. C-27, No. 9, pp. 855-865, Sep. 1978.
"Maximal Rate Pipelined Solutions to Recurrence Problems", P. M. Kogge, Proceedings of Annual Symposium on Computer Architecture, 9th-11th Dec. 1973, IEEE 1973, pp. 71-76.

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