Browsing by Author "Rahman, Mohammad Osiur"

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    Display Unit for Bangla Characters
    (CRP, International Islamic University Chittagong, Bangladesh, 2007-12) Rahman, Mohammad Osiur; Khan, Mohammad Aktaruzzaman
    Segmented representation is used in lieu of the dot matrices representation for alphanumeric characters of different languages. Due to concerns of cost, power loss and design complexity, the segmented representation becomes more popular over the dot matrices. There are very limited display units for English, Arabic, and Bangla alphanumeric characters. 18-segments display is normally used to display the entire alphabetic character of English. But there is no standard display unit for Bangla Alphabetic Characters. Although recently different segmented display models for Bangla characters have been proposed, the quality of the characters stay below the mark. In this paper, 26-segments display for Bangla alphabetic character has been proposed. From the review it appears that it is the first proposed display in the world for Bangla Alphabetic Character. Here a grid structure consisting of 26 segments has been discovered. All Bangla characters vowel and consonants can be characterized by using this grid structure. As there can be at least vowels (12), consonants (39), punctuation, and some other symbols to be displayed, 6-bit inputs are used to represent each character. After analyzing which segments will be activated for which character, appropriate logic function and circuits have been derived in order to display each Bangla character. Finally, a comparative analysis is made among the different proposed segmented display models to find out the cost and effectiveness in terms of display quality, power loss, and design complexity.
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    Software for The Minimization of The Logic Functions
    (International Islamic University Chittagong, Bangladesh,, 2021-03-27) Rahman, Mohammad Osiur; Islam, . Md. Nurul
    The design and operation of software based on Karnaug}t mapping method was undertaken to simplifying the logic function and to draw the relevant circuits. In the present software, the user selects the input variable and gives the decimal value of the corresponding minterms. The software constructs the Karnaugh map (K_map) corresponding to the input variable. Entries of J are made in the cells corresponding to the min terms that make the function a J in Sum-of-Product (SOP) form and D's are entered in the remaining cells. The software simplifies the Boolean function by correctly grouping the adjacent 1 's.On simplification the software implement logic circuit automatically. The software convert numbers from one number system to another, perform basic binary arithmetic, evaluate and simplify a Boolean and logic functions. It also analyzes a combinational logic circuit to obtain its switching functions, design a combinational logic circuit, simplify the design, implement the design using SSI, MSI, and programmable logic devices. It further analyzes synchronous sequential logic circuits, design synchronous logic circuits using state diagram and ASM chart, simplify the design circuits,. and implement the design circuits using SSI, MSI, and programmable logic devices. Simulate the design circuits using all software. It is also applicable for Neural Networks software for the minimization of the logical functions and may follow Canonical Binary Functions.