Rayat Institute of Engineering
& Information Technology
Approved by AICTE, Affiliated to PTU, Jalandhar.
Digital Circuits & Logic Design Lab

Digital electronics or digital (electronic) circuits are electronics that handle digital signals (discrete bands of analog levels) rather than by continuous ranges as used in analog electronics. All levels within a band of values represent the same information state. Because of this discretization, relatively small changes to the analog signal levels due to manufacturing tolerance, signal attenuation or noise do not leave the discrete envelope, and as a result are ignored by signal state sensing circuitry.

In most cases, the number of these states is two, and they are represented by two voltage bands: one near a reference value (typically termed as "ground" or zero volts), and the other a value near the supply voltage. These correspond to the false and true values of the domain respectively. Digital techniques are useful because it is easier to get an electronic device to switch into one of a number of known states than to accurately reproduce a continuous range of values.

BTCS 308 Digital Circuits & Logic Design Lab

Implementation all experiments with help of Bread- Board:

  1. Study of Logic Gates: Truth-table verification of OR, AND, NOT, XOR, NAND and NOR gates; Realization of OR, AND, NOT and XOR functions using universal gates.
  2. Half Adder / Full Adder: Realization using basic and XOR gates.
  3. HalfSubtractor / Full Subtractor: Realization using NAND gates.
  4. 4-Bit Binary-to-Gray & Gray-to-Binary Code Converter: Realization using XOR gates.
  5. 4-Bit and 8-Bit Comparator: Implementation using IC7485 magnitude comparator chips.
  6. Multiplexer: Truth-table verification and realization of Half adder and Full adder using IC74153 chip.
  7. Demultiplexer: Truth-table verification and realization of Half subtractor and Full subtractor using IC74139 chip.
  8. Flip Flops: Truth-table verification of JK Master Slave FF, T-type and D-type FF using IC7476 chip.
  9. Asynchronous Counter: Realization of 4-bit up counter and Mod-N counter using IC7490 & IC7493 chip.
  10. Synchronous Counter: Realization of 4-bit up/down counter and Mod-N counter using IC74192 & IC74193 chip.
  11. Shift Register: Study of shift right, SIPO, SISO, PIPO, PISO & Shift left operations using IC7495 chip.
  12. DAC Operation: Study of 8-bit DAC (IC 08/0800 chip), obtain staircase waveform using IC7493 chip.
  13. ADC Operations: Study of 8-bit ADC.

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