DatasheetQ Logo
Electronic component search and free download site.
Transistors,MosFET ,Diode,Integrated circuits

LA1260 View Datasheet(PDF) - SANYO -> Panasonic

Part Name
Description
Manufacturer
LA1260 Datasheet PDF : 14 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
LA1260
How to apply FM AFC
The S curve at the FM output pin (pin 8) is as shown in Figure 1. Therefore, the domestic (Japan) band (lower local
oscillation) use and foreign band (upper local oscillation) use differ as shown in Figures 2 and 3.
Figure 1
Figure 2 Domestic (lower local
oscillation) band
Figure 3 Foreign (upper local
oscillation) band
Unit (resistance : , capacitance : F)
AM local oscillation
Since the LA1260 contains an ALC circuit, the oscillation level at pin 16 can be limited to 60 to 150mV in the
following applications where a coil is used.
Unit (capacitance : F)
Stable oscillation occurs at a coil impedance of 5kor greater viewed from across pins 16 and 15. Turn ratio n and
QO must be determined so that the oscillation level at pin 16 becomes 75mV or greater for MW use and 60mV or
greater for SW use.
If turn ratio n is increased more than needed, the oscillation level at pin 16
drops, thereby lowering the maximum sensitivity as shown in Figure 5 and 6.
Figure 7 shows the relation between turn ratio n and oscillation level at pin
16 in the MW band.
Figure 4
Unit (capacitance : F)
Figure 5
21MHz reception mode
Maximum sensitivity
(input at detection
output –30dBm)
Usable sensitivity (S/N=20dB)
Figure 6
fr=1000kHz reception
Usable sensitivity
(S/N=20dB)
Maximum sensitivity
(input at detection
output –30dBm)
OSC injection voltage at pin 16 – mV
OSC injection voltage at pin 16 – mV
No.1506-4/14
 

Share Link: 

datasheetq.com  [ Privacy Policy ]Request Datasheet ] [ Contact Us ]