Electrical pulse counters – pulse dividers – or shift registers: c – Shift register – Particular input circuit
Patent
1990-07-19
1991-12-17
Heyman, John S.
Electrical pulse counters, pulse dividers, or shift registers: c
Shift register
Particular input circuit
377 73, G11C 506
Patent
active
050739093
ABSTRACT:
The present invention discloses a method of simulating the state of a TYPE I Linear Feedback Shift Register (LFSR) with information available as a result of a TYPE II LFSR implementation. This is accomplished by clocking a TYPE II LFSR to produce an output sequence. This sequence, or at least a portion thereof, is then stored in a storage medium, such as, for example, a shift register. Cascading a TYPE II LFSR output sequence into a shift register of length N, where N is the number of stages employed by the TYPE II LFSR, is the exact equivalent of a TYPE I LFSR. Accordingly, the shift register's contents will contain data corresponding to the state of a TYPE I LFSR.
REFERENCES:
patent: 3439279 (1969-04-01), Guanella
patent: 3818242 (1974-06-01), Freedman
patent: 4531022 (1985-07-01), Pioli
patent: 4780627 (1988-10-01), Illman
Kotzin Michael D.
Wilson Alan L.
Heyman John S.
Hillman Val Jean F.
Motorola Inc.
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