Unit 3: Computer Circuits
What is a digital circuit?
A group of electronic components that uses binary signals to perform some task.
What is an integrated circuits?
A "chip" that contains many components in microscopic circuits.
A group of electronic components that uses binary signals to perform some task.
What is an integrated circuits?
A "chip" that contains many components in microscopic circuits.
Basic Terminology
1. Analog signal: one whose output varies continually in step with the input.
2. Digital signal: one whose output varies at discrete voltage levels commonly called HIGH or LOW (1s and 0s).
3. Number system: code using symbols that refer to a number of items.
4. Decimal number system: uses ten symbols base (10 system)
5. Binary system: uses 1s (HIGH) and 0s (LOW)
2. Digital signal: one whose output varies at discrete voltage levels commonly called HIGH or LOW (1s and 0s).
3. Number system: code using symbols that refer to a number of items.
4. Decimal number system: uses ten symbols base (10 system)
5. Binary system: uses 1s (HIGH) and 0s (LOW)
Binary/Hex numbers
Computers and many other identical machines work on the principle of number manipulation. Inside the computer the numbers are represented in bits and bytes. The binary numbering system uses 1s (HIGHs) and 0s (LOWs). The other major numbering system used by computers is the hexadecimal, also known as base 16. In this systems, the numbers are counted from 0 to 9, then letters A to F before adding another digit. The letter A through F represent decimal numbers 10 through 15.
Logic Gates/Boolean
A logic gates is an elementary building block of a digital circuit. Most logic gates have two inputs and one output. At any given moment, every terminal is in one of the two binary conditions of HIGH (1s) or LOW (0s). There are 7 basic logic gates which are; AND, OR, XOR, NAND, NOR, XNOR AND NOT. Each one of these gates have a boolean equation and symbol. For example the equation for AND gate is A x B = Y (x represents multiplication).