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| 型号： | LA1260 |
| 元件分类： | 接收器 |
| 英文描述： | AM/FM, AUDIO SINGLE CHIP RECEIVER, PDIP16 |
| 封装： | DIP-16 |
| 文件页数： | 9/14页 |
| 文件大小： | 594K |
| 代理商： | LA1260 |
LA1260
No.1506-4/14
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.
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.
Stable oscillation occurs at a coil impedance of 5k
Ω or 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.
Unit (capacitance : F)
Figure 1
Figure 2 Domestic (lower local
oscillation) band
Figure 3 Foreign (upper local
oscillation) band
Unit (resistance :
Ω, capacitance : F)
Unit (capacitance : F)
OSC injection voltage at pin 16 – mV
Maximum
sensitivity,
V
S
Usable
sensitivity,
Q
S
–
dB/m
Maximum
sensitivity,
V
S
Usable
sensitivity,
Q
S
–
dB/m
OSC injection voltage at pin 16 – mV
21MHz reception mode
fr=1000kHz reception
Maximum sensitivity
(input at detection
output –30dBm)
Maximum sensitivity
(input at detection
output –30dBm)
Usable sensitivity (S/N=20dB)
Usable sensitivity
(S/N=20dB)
Figure 5
Figure 6
Figure 4
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相关代理商/技术参数 |
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| LA1261 | 制造商:未知厂家 制造商全称:未知厂家 功能描述: |
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| LA1266 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:AM/FM Tuner System Of Electronic Tuning Type |
| LA1267 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:FM/AM Tuner of Electronic Tuning Type |
| LA126B-3-SR | 制造商:LIGITEK 制造商全称:LIGITEK electronics co., ltd. 功能描述:LED ARRAY |
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