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參數(shù)資料
| 型號(hào)： | LA7567N |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | 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 |
| 中文描述： | 電視和錄像機(jī)資料表格/中頻信號(hào)強(qiáng)度因子與PAL制式處理電路/ NTSC制式多格式音頻支持 |
| 文件頁數(shù)： | 13/14頁 |
| 文件大?。?/td> | 277K |
| 代理商： | LA7567N |
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
Coil Specifications
With the Tuning Set to the Vicinity of S and C
No. 5765-13/14
LA7567N, 7567NM
Tokyo Parts Industrial Co., Ltd. 236 Hinode Machi, Isezaki Shi, Gunma Prefecture, Japan
TEL: +81-270-23-3731
JAPAN f = 58.75 MHz
US f = 45.75 MHz
PAL f = 38.9 MHz
VCO coil
Test production no. 16991B
Tokyo Parts Industrial Co., Ltd.
Test production no. 16687B
Tokyo Parts Industrial Co., Ltd.
Test production no. 16686B
Tokyo Parts Industrial Co., Ltd.
SAW filter
(SPLIT)
Picture
TSF1137U
Sound
Picture
TSF1241
Sound
Picture
TSF5315
Sound
SAW filter
(INTER)
TSF5220
TSF5221
TSF5321
TSF5344
The high band is reduced
SAW filter
characteristics
The high band is extended
Frequency
Frequency
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LA7567NM | TV and VCR VIF/SIF IF Signal-Processing Circuit with PAL/NTSC Multi-Format Audio Support |
| LA75691 | IF Signal-Processing IC for PAL/NTSC Multichannel Audio TV and VCR Systems |
| LA7570 | TV,VTR IF Signal Processor (Super Split PLL VIF+SIF) |
| LA75710VA | Monolithic Linear IC NTSC Support TV and VCR VIF/SIF Signal Processing IC |
| LA7575 | Super-Split，PLL-II Video and Sound IF Signal Processor(利用鎖相環(huán)處理視頻和音頻信號(hào)的IF信號(hào)處理器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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) |
| LA7570 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:TV,VTR IF Signal Processor (Super Split PLL VIF+SIF) |
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