ECE 2020 Digital Design

Last time

• Last time
  • positional number systems - conversion between systems
  • addition of signed and unsigned integers
• To be effectively prepared for today you should have:
  • Worked on Homework 4 (due Friday October 31, 2025)
• Exam 3 on Monday November 03, 2025
  • Covering Mixed logic and number systems
• Exam 2 feedback

• Today
  • combinational logic
• Be ready!
  • Take your quizz at 10:15am

Combinational logic building blocks

• A logic circuit is combinational if the output is completely determined by the current inputs
  • the output reacts (almost) immediately to a change of input
  • the circuit has no moemory
• We will study several blocks
  • encoders and decoders
  • multiplexers and demultiplexers
  • adders
  • comparators

Decoders

Encoders

Multiplexers

Until next time

• To be effectively prepared for Monday October 27, 2025, you should:
  • Work on Homework 4