Titlebook: Counting & Counters; R. M. M. Oberman Textbook 1981Latest edition Macmillan Publishers Limited 1981 computer science.Counting.hardware.log

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Constant-ratio Counters,In the codes which have code words with a constant sum of the non-zero information elements, the number of places . of the information elements is constant. The weights of the information elements may vary from 0 to . (where . is the radix of the number system) and the sum of all the information elements is ..

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Accumulative Counters,The binary up—down counter is an excellent example of an accumulative counter. It operates in accordance with the add-1/subtract-1 algorism . = .. The circuit consists of a special add-1/subtract-1 gate circuit cooperating with an accumulative memory.

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Shift Register Counters,The counters discussed in the preceding chapters were combinational counters with natural binary, reflected binary or other types of code with the weight of the words being equal to the sum of the weights of the various 1 bits in the words. This weight represented the number of the code word in the code.

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Edgar Allan Poe, Charles Baudelaire, the next state of the counter is determined from the present state by means of a mod 2 adding network connected with the outputs of a number of shift register sections. This adder determines the least significant bit of the next state which is shifted into that register while the present state word

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https://doi.org/10.1007/978-1-349-81363-6computer science; Counting; hardware; logic

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