Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1987-07-17
1989-01-24
Hudspeth, David
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307219, 307465, 365230, H03K 19003
Patent
active
048003026
ABSTRACT:
An electronic system having multiple identical subsystems, some of which can be excluded from the system when defective or held as spares. A mapping circuit associated with each subsystem has a first register for storing a physical address of the subsystem and a second register for storing a logical address. To configure the system to include a selection of subsystems, pairs of physical and corresponding logical addresses are transmitted to the subsystem mapping circuits. When a transmitted physical address matches the address stored in the first register, the second register is enabled to receive a transmitted logical address. The mapping of physical to logical address is therefore distributed among all of the subsystems rather than being handled in a central mapping unit. Subsystems that are to remain out of service have a null address stored in their second registers. In normal operation of the entire system, a logical address transmitted to the subsystems is compared with the logical address stored in each second register, and only the matching subsystem is selected for operation.
REFERENCES:
patent: 3860831 (1975-01-01), Goser
patent: 3937936 (1976-02-01), Saporito et al.
patent: 4112502 (1978-09-01), Scheuneman
patent: 4389715 (1983-06-01), Eaton, Jr. et al.
patent: 4551814 (1985-11-01), Moore et al.
Heal Noel F.
Hudspeth David
Keller Robert W.
TRW Inc.
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