This document discusses electronic circuits and communication systems. It covers topics such as basic circuit theory, electronic circuit design, transmission and reception methods for analog and digital systems, and examples of AM, FM, and radio wave receivers. Diagrams are provided to illustrate transmitter and receiver components as well as integrated circuits used in FM radios and TVs.

1. Electronic Circuit &
Communication
System
Yong Heui Cho @ Mokwon University

2. 2
Electronic Circuit Design
2. Basic Circuit Theory
3. Basic Electronic Circuit
4. Electronic Ckt & Commo
System
5. Basic Measurement System

3. 3
Communication Tx
• Tx: transmitter
 )cos()cos(
2
1
)cos()cos( yxyxyx 
BBf BBLO ff  BBLO ff 

← RFDH.com

4. 4
Communication Rx
• Rx: receiver
 )cos()cos(
2
1
)cos()cos( yxyxyx 
BBfBBIF ff BBLO ff 
IFLO fff  IFff 

← RFDH.com

5. 5
Analog System

6. 6
Digital System

7. 7
AM Receiver

8. 8
FM Receiver

9. 9
FM Receiver with IC
• One IC for FM radio and TV
– TDA7000: 70~120 MHz
TDA7000
block diagram

10. 10
Radio Wave Detector