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參數資料
| 型號： | LA7565KM |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | IF Signal-Processing IC for PAL/NTSC Multi-System Audio TV and VCR Products |
| 中文描述： | 中頻信號處理集成電路PAL / NTSC制式多系統(tǒng)音頻電視機和錄像機產品 |
| 文件頁數： | 17/18頁 |
| 文件大?。?/td> | 191K |
| 代理商： | LA7565KM |
No. 6100-17/18
LA7565E, 7565KM
Coil Specifications
Toko Co., Ltd.
2-1-17 Higashi-yukigaya, Ohta-ku, Tokyo, Japan TEL: +81-3-3727-1167
Notes on VCO Tank Circuits
1. Built-in capacitor VCO tank circuits
When the power is turned on, the heat generated by the IC is transmitted through the printed circuit board to the VCO
transformer. At this point, the VCO coil frame functions as a heat sink and the IC heat is dissipated. As a result, it
becomes more difficult to transmit heat to the VCO transformer's built-in capacitor, and the influence of drift at
power on is reduced. Therefore, it suffices to design the circuit so that the coil and capacitor thermal characteristics
cancel. Ideally, it is better to use a coil with a core material that has low temperature coefficient characteristics.
2. External capacitor VCO tank circuits
When an external capacitor is used, heat generated by the IC is transmitted through the printed circuit board directly
to the VCO tank circuit external capacitor. While this capacitor is heated relatively early after the power is turned on,
the coil is not influenced as much by this heat, and as a result the power-on drift is increased. Accordingly, a coil
whose core material has low temperature coefficient characteristics must be used. It is also desirable to use a
capacitor with similarly low temperature coefficient characteristics.
Note: Applications that use an external capacitor here must use a chip capacitor. If an ordinary capacitor is used,
problems such as the oscillator frequency changing with the capacitor orientation may occur.
JAPAN
f = 58.75 MHz
US
PAL
f = 45.75 MHz
f = 38.9 MHz
VCO coil
Test production no. V291XCS-3220Z
Toko Co., Ltd.
Test production no. 291XCS-3188Z
Toko Co., Ltd.
Test production no. 292GCS-7538Z
Toko Co., Ltd.
SAW filter (SPLIT)
Picture
TSF1137U
Sound
Picture
TSF1241
Sound
Picture
TSF5315
Sound
SAW filter (INTER)
TSF5220
TSF5221
TSF5321
TSF5344
S
t = 5 t
0.12
C = 24 pF
A12072
S
t = 6 t
0.12
C = 24 pF
A12073
S
t = 7 t
0.12
C = 24 pF
A12074
相關PDF資料 |
PDF描述 |
|---|---|
| LA7566 | VIF/SIF IF Signal-Processing Circuit with TV/VCR PAL and NTSC Multisound Support |
| LA75675M-S | VIF/SIF IF Signal-Processing Circuit that Supports NTSC Intercarrier for TV and VCR Products |
| LA75676V-S | VIF/SIF IF Signal-Processing Circuit for TV and VCR Products |
| LA7567B | LA7567B, LA7567BM |
| LA7567BM | LA7567B, LA7567BM |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LA7566 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:VIF/SIF IF Signal-Processing Circuit with TV/VCR PAL and NTSC Multisound Support |
| LA75665M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| LA75665NM | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| LA75665NV | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| LA75675M-S | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:VIF/SIF IF Signal-Processing Circuit that Supports NTSC Intercarrier for TV and VCR Products |
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