WORK PRINCIPLE OF FM RADIO RECEIVER

Competency :

Repairing of Radio Receiver

Teknologi dan Rekayasa

Pengeras suara

Pengeras suara

Penguat RF

Antena

Pencampur PenguatIF

Penuluh Peng-aksen

Dekoder stereo

Penguat audio

Penguat audioOsilator

lokal

AGC

AFC

Detektor FM

Diagram blok penerima FM Stereo

Teknologi dan Rekayasa

FM Superheterodyne Receiver circuit

Teknologi dan Rekayasa

RF Amplifier with FET

OutputInput

0

0

+V12V

1 1cv

1np

1C

1C 1C

1C

2N4393

R1

R2

R3

Sample Image circuit RF Amplifier With Active Components FET

Teknologi dan Rekayasa

RF Amlpifier with MOSFET

output

input

optional AGC.1C4

15V

0

0

.1C4 91k

33k

00

1CV1

1000pf

1CV21CV2

1RFC

1L3

1L2

2N3796

0

.1C4

WITH RF amplifier MOSFET: A dual gate (double gate) Common Source MOSFET RF amplifiers

Teknologi dan Rekayasa

Limitter Circuit

Rangk.LIMITER

output

input

15V

.1C40

00

0

.1C4

.1C4.1C4

R1

R2 R3

R4

1CV11CV1

NPN

1CV1

.1

.1

.1.1

Discriminator: functions retrieve information from a high frequency carrierDeemphasis: is a series of paired after the detector that functions return a high frequency of the frequency of intelligence (information) back to the amplitude level equal to the low frequency

Teknologi dan Rekayasa

Principle of FM modulasi

FM band of the electromagnetic spectrum lies between 88 MHz and 108 MHz

Teknologi dan Rekayasa

Frekuensi on FM

Changes in large-scale frequency is proportional to the amplitude of the signal information. FM radio carrier around 100 MHz is limited to the modulation of + / - 0.1 MHz

Diagram blok FM simple

Teknologi dan Rekayasa

Modulasi sinyal FM

Teknologi dan Rekayasa

Band pass filter

Teknologi dan Rekayasa

Teknologi dan Rekayasa

THE END

By. Setyo Harmadi,ST SMK Muhammadiyah 3 Yogyakarta