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