Telecommunication system controlled by stored program instructions
US4002851A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 19, 1975 |
| Grant date | Jan 11, 1977 |
| Priority date | — |
| Expiry date | May 19, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/226
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A SPC-telecommunication system comprises test points, operating points, data-bus interconnected data storage registers, a phase generator and an access signal generator. The registers include instruction registers for storage of instructions, and an unit-incrementing address register for storage of addresses identifying the instructions. The phase generator produces phase signals by which the processing cycles of the instructions are divided in phases. The access signal generator is controlled by the phase signals, the addresses and the instructions. For producing access signals in order to control the test points, operating points and registers, the access signal generator includes logic arrangements or units. A first logic unit decodes the contents of the address register during the beginning phase of the respective cycle and accesses the instruction register associated with the respective address during the other phases of the cycle. A second logic unit initiates a unit incrementing of the address register during a middle phase of each cycle. A third logic unit allows transfer of an address from one of the registers to the address register only during the end phase of the respec…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.