CS 25000 Lecture Notes - Lecture 4: Logic Level

• School: Purdue University
• Department: Computer Sciences
• Course: CS 25000
• Professor: Adams George

Document Summary

Adding and remembering: built on a system of two values, general concept: Active high and active low: assume logic 1 is represented by a higher voltage than logic 0; called active high (positive. If low voltage output signal when push, user input is active low. If high voltage when push, then active high: gate speed is always of interest, propagation delay. Gate specifications: elapsed time from a gate input change until a gate output change, combinatorial logic. Implements functions of logic inputs to generate a result or output: function and circuit behavior depends on history, feedback: connect output to input.