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US3774157A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of and arrangement for the distribution of timing pulses in an electronic data processor

Assignee: International Business Machines Corp
•
Filing: 1971-11-26
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Granted: 1973-11-20
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Expires: 1991-11-26
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Abstract

Abstract This specification describes a system for distributing timing pulses in an electronic data processor which minimizes differences in propagation time delays between timing pulses in a timing bus system and data pulses in a data bus system. The system involves first determining the direction of transmission of the data pulses and thereafter transmitting the timing pulses in the same direction.

Inventors

  • 👤 F Tsui

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 10:28
CPC Classifications
G; G06; G06F; G06F1/00; G06F1/04; G06F1/10

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 222 words
A system for the distribution of timing pulses in a data processing system having a plurality of processing units connected to each other and at least one memory along lines in both the data pulse bus and timing pulse bus networks, comprising: a timing pulse generator means; control gate pair means for coupling the timing pulse generator means to the individual lines of the timing pulse bus network with one control gate in each gate pair linking one end of a line of the timing pulse bus network to the timing pulse generator and the other gate in that pair linking the other end of the same line to the timing pulse generator; latch circuit means coupled to said gate pair means to provide a gating signal to only one gate in each pair to open the gate to timing pulses from the timing pulse generator; and transmission control means for controlling the production of the gating signal by the latch circuit means in response to the direction of transmission of the data signals on the data bus and causing the latch means to provide a signal to the gates in the gate pair that permits transmission of timing signals along the timing pulse bus network in the same direction as the data is being transmitted along the data pulse bus network.
Claim 2
Independent Claim 222 words
A system for the distribution of timing pulses in a data processing system having a plurality of processing units connected to each other and at least one memory along lines in both the data pulse bus and timing pulse bus networks, comprising: a timing pulse generator means; control gate pair means for coupling the timing pulse generator means to the individual lines of the timing pulse bus network with one control gate in each gate pair linking one end of a line of the timing pulse bus network to the timing pulse generator and the other gate in that pair linking the other end of the same line to the timing pulse generator; latch circuit means coupled to said gate pair means to provide a gating signal to only one gate in each pair to open the gate to timing pulses from the timing pulse generator; and transmission control means for controlling the production of the gating signal by the latch circuit means in response to the direction of transmission of the data signals on the data bus and causing the latch means to provide a signal to the gates in the gate pair that permits transmission of timing signals along the timing pulse bus network in the same direction as the data is being transmitted along the data pulse bus network.
Claim 3
Dependent Claim 21 words
The system of claim 1 wherein the timing bus system and the data bus system have essentially identical propagation time characteristics.
Claim 4
Dependent Claim 24 words
The system of claim 2 including feed line means coupling the timing pulse generator to the control gate pairs by electrically equally distant paths.

References Cited (Backward Citations)

US3453607A Cited
US3576396A Cited
US3575752A Cited
US3609698A Cited
US3576570A Cited
US3560934A Cited
US3648256A Cited
US3643223A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-11-19 1977-05-21 1977-11-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-11-19 1981-05-21 1981-11-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-11-19 1985-05-21 1985-11-20 $7700.00 Window Closed / Lapsed

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