CONTROL CIRCUIT INCLUDING A MEMORY PROVIDING STEP FUNCTIONS
A control circuit comprising a read-only memory (3) has its storage area divided into two areas each containing the same number of addressable words. By arranging that input of a single address signal (An+1) causes a change from addressing a particular word in one area to addressing a corresponding...
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| Main Authors | , |
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| Format | Patent |
| Language | English |
| Published |
16.08.1989
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| Edition | 4 |
| Subjects | |
| Online Access | Get full text |
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| Abstract | A control circuit comprising a read-only memory (3) has its storage area divided into two areas each containing the same number of addressable words. By arranging that input of a single address signal (An+1) causes a change from addressing a particular word in one area to addressing a corresponding word in the other area, and by programming a fixed difference in value between corresponding words in the two areas causes a step function in the output. Using a digital to analogue converter (1) on the output of the circuit permits a step change in a voltage output (1) to be provided to (eg) a voltage controlled oscillator (4). A control circuit using a read-only memory as a voltage comparator is also disclosed. |
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| AbstractList | A control circuit comprising a read-only memory (3) has its storage area divided into two areas each containing the same number of addressable words. By arranging that input of a single address signal (An+1) causes a change from addressing a particular word in one area to addressing a corresponding word in the other area, and by programming a fixed difference in value between corresponding words in the two areas causes a step function in the output. Using a digital to analogue converter (1) on the output of the circuit permits a step change in a voltage output (1) to be provided to (eg) a voltage controlled oscillator (4). A control circuit using a read-only memory as a voltage comparator is also disclosed. |
| Author | HAYES, PAUL MALCOM CORDWELL, BRIAN |
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| Edition | 4 |
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| Notes | Application Number: EP19850309335 |
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| PublicationDate | 19890816 |
| PublicationDateYYYYMMDD | 1989-08-16 |
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| PublicationDecade | 1980 |
| PublicationYear | 1989 |
| RelatedCompanies | PLESSEY OVERSEAS LIMITED |
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| Snippet | A control circuit comprising a read-only memory (3) has its storage area divided into two areas each containing the same number of addressable words. By... |
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| SubjectTerms | AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES BASIC ELECTRONIC CIRCUITRY CALCULATING COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING ELECTRICITY HYBRID COMPUTING ARRANGEMENTS PHYSICS |
| Title | CONTROL CIRCUIT INCLUDING A MEMORY PROVIDING STEP FUNCTIONS |
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