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The exhaustive list of topics in Digital Circuits in which we provide Help with Homework Assignments and Help with Projects is as follows:

  • Number Systems and Codes: Positional number system; Binary, octal and hexadecimal number systems; Methods of base conversions; Binary, octal and hexadecimal arithmetic; Representation of signed numbers; Fixed and floating point numbers; Binary coded decimal codes; Gray codes; Error detection and correction codes - parity check codes and Hamming code.
  • Combinatorial Logic Systems: Truth table; Basic logic operation and logic gates.
  • Boolean Algebra and Switching Functions: Standard representation of logic functions - SOP and POS forms; Simplification of switching functions - K-map and Quine-McCluskey tabular methods; Synthesis of  combinational logic circuits.
  • Logic families: Operational characteristics of BJT in    saturation and cut-off regions; Operational characteristics of MOSFET as switch;    TTL inverter - circuit description and operation; CMOS inverter - circuit description    and operation; Structure and operations of TTL and CMOS gates; Electrical    characteristics of logic gates – logic levels and noise margins, fan-out, propagation delay, transition time, power consumption and power-delay product.
  • Combinational Logic Modules and their applications: Decoders, encoders, multiplexers, demultiplexers and their applications; Parity circuits and comparators; Arithmetic modules- adders, subtractors and ALU.
  • Sequential Logic systems: sequential circuits- latches and flip-flops: SR-latch, D-latch, D flip-flop, JK flip-flop,    T flip-flop; Timing hazards and races; Analysis of state machines using D flip-flops and JK flip-flops; Design of state machines - state table, state assignment.
  • State machine design approach: Designing state machine using ASM charts; Designing state machine using state diagram
  • Sequential logic modules and their applications: Multi-bit latches and registers, counters, shift register, application examples.
  • Memory: Read-only memory, read/write memory - SRAM and DRAM
  • Programmable Logic Devices: PLAs, PALs and their applications; Sequential PLDs and their applications; State-machine design with sequential PLDs; Introduction to field programmable gate  arrays  (FPGAs)