4EC3-DIGITAL ELECTRONICS |
Units: I-NUMBER SYSTEMS, BASIC LOGIC GATES & BOOLEAN ALGEBRA: |
Binary Arithmetic & Radix representation of different numbers. Sign & magnitude representation, Fixed point
representation, complement notation, various codes & arithmetic in different codes & their inter
conversion. Features of logic algebra, postulates of Boolean algebra. Theorems of Boolean algebra.
Boolean function. Derived logic gates: Exclusive-OR, NAND, NOR gates, their block diagrams and
truth tables. Logic diagrams from Boolean expressions and vica-versa. Converting logic diagrams to
universal logic. Positive, negative and mixed logic. Logic gate conversion.
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Units: II-DIGITAL LOGIC GATE CHARACTERISTICS: |
TTL logic gate characteristics. Theory &
operation of TTL NAND gate circuitry. Open collector TTL. Three state output logic. TTL subfamilies.
MOS & CMOS logic families. Realization of logic gates in RTL, DTL, ECL, C-MOS & MOSFET.
Interfacing logic families to one another. |
Units: III-MINIMIZATION TECHNIQUES: |
Minterm, Maxterm, Karnaugh Map, K map upto 4 variables.
Simplification of logic functions with K-map, conversion of truth tables in POS and SOP form.
Incomplete specified functions. Variable mapping. Quinn-Mc Klusky minimization techniques.
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Units: IV-COMBINATIONAL SYSTEMS: |
Combinational logic circuit design, half and full adder,
subtractor. Binary serial and parallel adders. BCD adder. Binary multiplier. Decoder: Binary to Gray
decoder, BCD to decimal, BCD to 7-segment decoder. Multiplexer, demultiplexer, encoder. Octal
to binary, BCD to excess-3 encoder. Diode switching matrix. Design of logic circuits by multiplexers,
encoders, decoders and demultiplexers.
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Units: V-SEQUENTIAL SYSTEMS: |
Latches, flip-flops, R-S, D, J-K, Master Slave flip flops.
Conversions of flip-flops. Counters : Asynchronous (ripple), synchronous and synchronous decade
counter, Modulus counter, skipping state counter, counter design. Ring counter. Counter
applications. Registers: buffer register, shift register.
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