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參數(shù)資料
| 型號： | LA7567GM |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | TV and VCR VIF/SIF IF Signal-Processing Circuit with NTSC SPLIT Support |
| 中文描述： | 電視和錄像機(jī)資料表格/中頻信號強(qiáng)度因子處理電路與分體式支持NTSC制式 |
| 文件頁數(shù)： | 13/14頁 |
| 文件大小： | 185K |
| 代理商： | LA7567GM |
Notes on Sanyo SAW Filters
There are two types of SAW filters, which differ in the piezoelectric substrate material, as follows:
Lithium tantalate (LiTaO3) SAW filter
TSF11
I
I
I
I
... Japan
TSF12
I
I
I
I
... US
Although lithium tantalate SAW filters have the low temperature coefficient of –18 ppm/°C, they suffer from a large
insertion loss. However, it is possible, at the cost of increasing the number of external components required, to
minimize this insertion loss by using a matching circuit consisting of coils and other components at the SAW filter
output. At the same time as minimizing insertion loss, this technique also allows the frequency characteristics, level,
and other aspects to be varied, and thus provides increased circuit design flexibility. Also, since the SAW filter
reflected wave level is minimal, the circuit can be designed with a small in-band ripple level.
Lithium niobate (LiNbO3) SAW filter
TSF52
I
I
I
I
... US
TSF53
I
I
I
I
... PAL
Although lithium niobate SAW filters have the high temperature coefficient of –72 ppm/°C, they feature an insertion
loss about 10 dB lower than that of lithium tantalate SAW filters. Accordingly, there is no need for a matching circuit
at the SAW filter output. Although the in-band ripple is somewhat larger than with lithium tantalate SAW filters, since
they have a low impedance and a small field slew, they are relatively immune to influences from peripheral circuit
components and the geometry of the printed circuit board pattern. This allows stable out-of-band trap characteristics to
be acquired. Due to the above considerations, lithium tantalate SAW filters are used in applications for the US and
Japan that have a high IF frequency, and lithium niobate SAW filters are used in PAL and US applications that have a
low IF frequency.
Notes on SAW Filter Matching
In SAW filter input circuit matching, rather than matching the IF frequency, flatter video band characteristics can be
acquired by designing the tuning point to be in the vicinity of the audio carrier rather than near the chrominance carrier.
The situation shown in figure on the right makes it easier to acquire flat band characteristics than that in figure on the
left.
With the Tuning Set to the IF frequency
With the Tuning Set to the Vicinity of S and C
No. 6803-13/14
LA7567GM
A13698
Coil Specifications
The high band is reduced
SAW filter
characteristics
The high band is extended
Frequency
Frequency
Toko Co., Ltd. 2-1-17 Higashi-yukigaya, Ohta-ku, Tokyo, Japan
TEL: +81-3-3727-1167
JAPAN f = 58.75 MHz
US f = 45.75 MHz
PAL 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
A12048
S
t = 6 t
0.12
C = 24 pF
A12049
S
t = 7 t
0.12
C = 24 pF
A12050
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PDF描述 |
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| LA7567N | EB Melody & Chime Series; Mounting Style: Panel mount; Functions: Melody & Chime; Rated Voltage: 120V AC; Style: Box style; Color: Beige Enclosure; Diameter: 133mm square; Applicable Model: EB |
| LA7567NM | TV and VCR VIF/SIF IF Signal-Processing Circuit with PAL/NTSC Multi-Format Audio Support |
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| LA7570 | TV,VTR IF Signal Processor (Super Split PLL VIF+SIF) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LA7567N | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:TV and VCR VIF/SIF IF Signal-Processing Circuit with PAL/NTSC Multi-Format Audio Support |
| LA7567NM | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:TV and VCR VIF/SIF IF Signal-Processing Circuit with PAL/NTSC Multi-Format Audio Support |
| LA75691 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:IF Signal-Processing IC for PAL/NTSC Multichannel Audio TV and VCR Systems |
| LA75694M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:For Use in TV/VTR Applications IF Signal Processing (VIF/SIF for Hi-Fi) |
| LA75695VA | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:For Use in TV/VTR Applications IF Signal Processing (VIF+SIF+SIF converter) |
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