IT 327 - Schweber Chap 15 1

Thought of the Day

  

Happiness is the object and design of our existence; and will be the end thereof, if we pursue the path that leads to it; and this path is virtue, uprightness, faithfulness, holiness, and keeping all the commandments of God.

 Joseph SmithTeachings, p. 255

IT 327 - Schweber Chap 15 2

Schweber, Chap 15:Frequency Synthesizers &

Direct Conversion

Non-Digital Tuning

IT 327 - Schweber Chap 15 3

Physical switching requiredQuite expensiveDrifted with timeRemote control:

Required motor to rotate switch

Very expensive

Non-Digital Tuning: Radio

IT 327 - Schweber Chap 15 4

Home Stereo Car Radio

Digital Tuning

IT 327 - Schweber Chap 15 5

Electronic switching Much less expensiveAlmost no drifting with timeRemote control:

Digital number entryCheap, easy

IT 327 - Schweber Chaps 4, 5 6

AM: Receiver

NOTE: RF = Radio Frequency amplifierLO = Local OscillatorIF = Intermediate FrequencyAF = Audio Frequency

Digital Tuning: Basic Block Diagram, text example

IT 327 - Schweber Chap 15 7

Digital Tuning: Basic Block Diagram, text example

IT 327 - Schweber Chap 15 8

Digital Tuning: Basic Block Diagram, AM example

IT 327 - Schweber Chap 15 9

Digital Tuning: Basic Block Diagram, AM example

IT 327 - Schweber Chap 15 10

Digital Tuning: Basic Block Diagram, AM example

IT 327 - Schweber Chap 15 11

Digital Tuning: Basic Block Diagram, FM example

IT 327 - Schweber Chap 15 12

Digital Tuning: Basic Block Diagram, FM example

IT 327 - Schweber Chap 15 13

Digital Tuning: Basic Block Diagram, FM example

IT 327 - Schweber Chap 15 14

Digital Tuning: Prescaling

IT 327 - Schweber Chap 15 15

Digital Tuning: Undersampling for Direct Demodulation

IT 327 - Schweber Chap 15 16