Topic 1(Introduction to digital systems)

Analog system

A combination of devices that manipulate values represented in analog form.

Analog System

The physical quantities or signals may vary continuous values over a specified range.

Digital system

A combination of devices that manipulate values represented in digital form.

Digital System

The physical quantities or signals can assume only discrete value

Analog Signal

Which signal is this graph representing?

Digital signal

Which signal is this graph representing?

Digital Representation

varies in discrete (separate) step. (0, 1)

Digital Representation

Analog Representation

a continuously variable, proportional indicator. (1.1, 1.2, 1.3)

Analog Representation

Analog Representation

Binary Digital Signal

An information variable represented by physical quantity.

For digital systems, the variable takes on discrete values.

Two level, or binary values are the most prevalent value

Logic Gate

is an electronic circuit that performs a specific logical function.

Logic Gate

Works with digital signals like (0 and 1)
Works (symbols) False(F) and True(T)

Integrated Circuit (IC)

also known as a microchip, computer chip, or simply chip,

is a small electronic device made up of multiple interconnected electronic

components such as transistors, resistors, and capacitors. These components are

etched onto a small piece of semiconductor material, usually silicon.

Transistor Transistor Logic

TTL mean?

Complementary Metal Oxide Semiconductor

CMOS mean?

Dual Incline Package

DIP means?

Comparators

is an electronic device that allow an

analog input to produce a digital output.

ADC (Analog Digital Conversion)

The process of converting an analog signal to a digital signal is called?

DAC (Digital Analog Conversion)

The process of converting a digital signal to an analog signal is called?

Comparators

Output is based on the comparison of the input
voltages.

Comparators

The comparators compare the input voltages with
the 5 voltage.

Comparators

Note how the output (green) is +5 volts when the
analog input (blue) exceeds the reference voltage
(red), otherwise the output is zero.

Ease of design, Good for storing information, Accuracy and precision, easy to maintain, less affected by noise, ease of fabrication ic chips, programmable operation

Advantages of Digital Systems

0.1 inches

Pin spacing of IC

True

True or False

Usually, but not always, +Vcc is at upper right, Ground at lower