Electrical pulse counters – pulse dividers – or shift registers: c – Systems – Using particular code or particular counting sequence
Patent
1990-05-31
1992-03-17
Heyman, John S.
Electrical pulse counters, pulse dividers, or shift registers: c
Systems
Using particular code or particular counting sequence
377 45, 377106, H03K 2340
Patent
active
050974912
ABSTRACT:
A Gray Code counter is provided having synchronous, modular circuits for each of the three types of bit positions, i.e., least significant bit ("LSB"), most significant bit ("MSB") and middle bit ("MB"). One LSB and MSB circuit each are used with as many MB circuits in between as are necessary to provide a counter having the desired number of bits. The LSB, MSB and MB circuits' designs are truly modular in that duplicate MB circuits can be freely coupled together between an LSB circuit and an MSB circuit to provide the desired number of counter bits without modifying any input or output interfaces between the circuits. The counter can count either up or down in accordance with a normal Gray Code sequence.
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Heyman John S.
National Semiconductor Corporation
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