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參數(shù)資料
| 型號： | LA1805 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | AM/FM-IF/MPX Tuner System for Radio-Casette Recorders, Music Centers |
| 中文描述： | 調(diào)幅/調(diào)頻中頻/盈豐調(diào)諧器系統(tǒng)的無線電Casette錄像機(jī)，音樂中心 |
| 文件頁數(shù)： | 5/13頁 |
| 文件大小： | 1006K |
| 代理商： | LA1805 |
LA1805
No.2887-5/13
5. FM muting pin
The external resistor connected to pin 12 can be used to vary the muting level (Figure 9). The abnormal sound at the
time of side peak reception at the FM mode can be reduced by weak signal muting.
Input – dBμ
Figure 9
LA1186N+LA1805 Muting Characteristics
N
Detuning frequency, f – kHz
Figure 10
LA1186N+LA1805 Attenuation – Detuning Frequency
A
Noise
6. The following method can be used to change the LED ON sensitivity at the FM mode (Figure 11). The data on the
LED ON sensitivity setting resistance and LED ON sensitivity is shown in Figure 12.
7. AM-FM selection
The FM mode is entered with pin 11 open as shown in
Figure 13. When pin 11 and pin 21 are made to be at
the same potential in terms of DC, the AM mode is
entered. It should be noted that the dynamic range is
narrowed whether the potential at pin 11 is lower or
higher than that at pin 21.
8. If a noise appears in the detection output when the tuning LED goes ON at the AM mode, connect a capacitor across
pin 8 and GND to eliminate the noise.
Resistance, R –
Figure 12
LED ON Sensitivity – R
L
Reference (R=Open)
Figure 11 Method to Change the LED ON
Sensitivity at the FM Mode
Unit (capacitance : F)
Figure 13
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LA1806 | AM/FM-IF/MPX Tuner System for Radio-Cassette Recorders, Music Centers |
| LA1810 | AM/FM/MPX Tuner System for Radio-Cassette Recorders, Music Centers |
| LA1816 | Single-Chip AM/FM, MPX Tuner System for Headphone Stereos, Radio-Cassette Recorders |
| LA1816M | Single-Chip AM/FM, MPX Tuner System for Headphone Stereos, Radio-Cassette Recorders |
| LA1823 | Single-Chip Tuner IC for Use in Radio Cassette Recorder |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LA1806 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:AM/FM-IF/MPX Tuner System for Radio-Cassette Recorders, Music Centers |
| LA1810 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:AM/FM/MPX Tuner System for Radio-Cassette Recorders, Music Centers |
| LA1811 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Consumer IC |
| LA1815 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Consumer IC |
| LA1816 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Single-Chip AM/FM, MPX Tuner System for Headphone Stereos, Radio-Cassette Recorders |
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