Intro to Digital Electronics. Classifications of Electronic Circuits Switching Circuits – by...
-
Upload
randolf-mclaughlin -
Category
Documents
-
view
213 -
download
0
Transcript of Intro to Digital Electronics. Classifications of Electronic Circuits Switching Circuits – by...
![Page 1: Intro to Digital Electronics. Classifications of Electronic Circuits Switching Circuits – by turning electricity on and off. – Figure 1 – Known as the.](https://reader036.fdocuments.in/reader036/viewer/2022070407/56649e425503460f94b351d6/html5/thumbnails/1.jpg)
Intro to Digital Electronics
![Page 2: Intro to Digital Electronics. Classifications of Electronic Circuits Switching Circuits – by turning electricity on and off. – Figure 1 – Known as the.](https://reader036.fdocuments.in/reader036/viewer/2022070407/56649e425503460f94b351d6/html5/thumbnails/2.jpg)
Classifications of Electronic Circuits
• Switching Circuits – by turning electricity on and off. – Figure 1– Known as the digital method.
• Regulating Circuits – controls intensity of current. – Figure 2– Known as the analog method
Figure 1 – Current is On or OffFigure 2 – Increase/Decrease Current
![Page 3: Intro to Digital Electronics. Classifications of Electronic Circuits Switching Circuits – by turning electricity on and off. – Figure 1 – Known as the.](https://reader036.fdocuments.in/reader036/viewer/2022070407/56649e425503460f94b351d6/html5/thumbnails/3.jpg)
What’s Digital and AnalogDigital Analog
ComputersMicroprocessorsWatchesDisplays
Audio AmplifiersRadiosTelevisions – stations have recently gone digital
![Page 4: Intro to Digital Electronics. Classifications of Electronic Circuits Switching Circuits – by turning electricity on and off. – Figure 1 – Known as the.](https://reader036.fdocuments.in/reader036/viewer/2022070407/56649e425503460f94b351d6/html5/thumbnails/4.jpg)
Why Digital?
• Digital electronics are simple, practical, and reliable.
• Combines simple switches and gates to create electrical functions.
• Digital means switching.– HI or 1 (one) or On– LO or 0 (zero) or Off
![Page 5: Intro to Digital Electronics. Classifications of Electronic Circuits Switching Circuits – by turning electricity on and off. – Figure 1 – Known as the.](https://reader036.fdocuments.in/reader036/viewer/2022070407/56649e425503460f94b351d6/html5/thumbnails/5.jpg)
Truth Table of a Digital Circuit
• The operation of the circuit to the right is represented by the table.
• Describes switch and output status.
• Truth tables represent the operation of a circuit.
Truth Table
Switch Bulb
OPEN OFF (LO or 0)
CLOSED ON (HI or 1)
![Page 6: Intro to Digital Electronics. Classifications of Electronic Circuits Switching Circuits – by turning electricity on and off. – Figure 1 – Known as the.](https://reader036.fdocuments.in/reader036/viewer/2022070407/56649e425503460f94b351d6/html5/thumbnails/6.jpg)
Timing Diagrams of a Digital Circuit
• Timing diagrams may also represent a digital circuit operation, in this case resistor voltage.
![Page 7: Intro to Digital Electronics. Classifications of Electronic Circuits Switching Circuits – by turning electricity on and off. – Figure 1 – Known as the.](https://reader036.fdocuments.in/reader036/viewer/2022070407/56649e425503460f94b351d6/html5/thumbnails/7.jpg)
Logic Gates
![Page 8: Intro to Digital Electronics. Classifications of Electronic Circuits Switching Circuits – by turning electricity on and off. – Figure 1 – Known as the.](https://reader036.fdocuments.in/reader036/viewer/2022070407/56649e425503460f94b351d6/html5/thumbnails/8.jpg)
Logic?
• Logic circuits are circuits that make decisions based on the inputs they receive.– Remember what the
digital signals can be?– 1 or 0; HI or LO; On or
Off
![Page 9: Intro to Digital Electronics. Classifications of Electronic Circuits Switching Circuits – by turning electricity on and off. – Figure 1 – Known as the.](https://reader036.fdocuments.in/reader036/viewer/2022070407/56649e425503460f94b351d6/html5/thumbnails/9.jpg)
Logic Indicators
• Logic Indicator is a device that indicates the logic state (either HI or LO) of a certain point in a circuit.– Usually a LED
![Page 10: Intro to Digital Electronics. Classifications of Electronic Circuits Switching Circuits – by turning electricity on and off. – Figure 1 – Known as the.](https://reader036.fdocuments.in/reader036/viewer/2022070407/56649e425503460f94b351d6/html5/thumbnails/10.jpg)
Boolean Algebra
• Conventional Algebra has 4 basic operations– Addition, subtraction, multiplication, division
• Boolean Algebra has 6 basic operations– AND, OR, NAND, NOR, NOT, YES
• Example: Using the AND Gate– Read as “A anded B equals Q”– Also read as A B = Q
• Try using the OR Gate:
QB
A
QB
A
![Page 11: Intro to Digital Electronics. Classifications of Electronic Circuits Switching Circuits – by turning electricity on and off. – Figure 1 – Known as the.](https://reader036.fdocuments.in/reader036/viewer/2022070407/56649e425503460f94b351d6/html5/thumbnails/11.jpg)
The AND Logic Gate
A B Q1 1 11 0 00 1 00 0 0
When is the output of this
gate HI?
Boolean EquationA B = Q
![Page 12: Intro to Digital Electronics. Classifications of Electronic Circuits Switching Circuits – by turning electricity on and off. – Figure 1 – Known as the.](https://reader036.fdocuments.in/reader036/viewer/2022070407/56649e425503460f94b351d6/html5/thumbnails/12.jpg)
The OR Logic Gate
A B Q1 1 11 0 10 1 10 0 0
When is the output of this
gate HI?
Boolean EquationA + B = Q
![Page 13: Intro to Digital Electronics. Classifications of Electronic Circuits Switching Circuits – by turning electricity on and off. – Figure 1 – Known as the.](https://reader036.fdocuments.in/reader036/viewer/2022070407/56649e425503460f94b351d6/html5/thumbnails/13.jpg)
The NOT (Inverter) Logic Circuit
A Q1 00 1
The NOT logic circuit is also called
the “inverter”.
Boolean EquationA = Q
“A is equal to not Q”
Widely used in many circuits; NAND and NOR gates are created by adding inverters to AND and OR gates.
![Page 14: Intro to Digital Electronics. Classifications of Electronic Circuits Switching Circuits – by turning electricity on and off. – Figure 1 – Known as the.](https://reader036.fdocuments.in/reader036/viewer/2022070407/56649e425503460f94b351d6/html5/thumbnails/14.jpg)
The YES Logic Circuit
A Q1 10 0
The input is the same as the output.
Also used as:Amplifiers – makes a weak
signal strong. Buffers – Isolates delicate
circuits
Boolean EquationA = Q
“A equals Q”
![Page 15: Intro to Digital Electronics. Classifications of Electronic Circuits Switching Circuits – by turning electricity on and off. – Figure 1 – Known as the.](https://reader036.fdocuments.in/reader036/viewer/2022070407/56649e425503460f94b351d6/html5/thumbnails/15.jpg)
Transistors
3904 3906
![Page 16: Intro to Digital Electronics. Classifications of Electronic Circuits Switching Circuits – by turning electricity on and off. – Figure 1 – Known as the.](https://reader036.fdocuments.in/reader036/viewer/2022070407/56649e425503460f94b351d6/html5/thumbnails/16.jpg)
The NOR Logic Gate
A B Q1 1 01 0 00 1 00 0 1
The result of this Gate is always
the opposite of an OR Gate.
Boolean EquationA + B = Q
![Page 17: Intro to Digital Electronics. Classifications of Electronic Circuits Switching Circuits – by turning electricity on and off. – Figure 1 – Known as the.](https://reader036.fdocuments.in/reader036/viewer/2022070407/56649e425503460f94b351d6/html5/thumbnails/17.jpg)
The OR Gate vs. the NOR Gate
The OR Gate The NOR Gate
A B Q1 1 11 0 10 1 10 0 0
A B Q1 1 01 0 00 1 00 0 1
![Page 18: Intro to Digital Electronics. Classifications of Electronic Circuits Switching Circuits – by turning electricity on and off. – Figure 1 – Known as the.](https://reader036.fdocuments.in/reader036/viewer/2022070407/56649e425503460f94b351d6/html5/thumbnails/18.jpg)
The NAND Logic Gate
A B Q1 1 01 0 10 1 10 0 1
The result of this Gate is always
the opposite of an AND Gate.
Boolean EquationA B = Q
![Page 19: Intro to Digital Electronics. Classifications of Electronic Circuits Switching Circuits – by turning electricity on and off. – Figure 1 – Known as the.](https://reader036.fdocuments.in/reader036/viewer/2022070407/56649e425503460f94b351d6/html5/thumbnails/19.jpg)
The AND Gate vs. the NAND Gate
The AND Gate The NAND Gate
A B Q1 1 11 0 00 1 00 0 0
A B Q1 1 01 0 10 1 10 0 0