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參數(shù)資料
| 型號： | LA75676V-S |
| 廠商： | SANYO SEMICONDUCTOR CO LTD |
| 元件分類： | 接收器 |
| 英文描述： | AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24 |
| 封裝： | 0.275 INCH, SSOP-24 |
| 文件頁數(shù)： | 4/13頁 |
| 文件大小： | 157K |
| 代理商： | LA75676V-S |
JAPAN
f = 58.75 MHz
US
f = 45.75 MHz
PAL
f = 38.9 MHz
VCO coil
Prototype no. V291XCS-3220Z
Prototype no. 291XCS-3188Z
Prototype no. 292GCS-7538Z
The Toko Electric Corporation
SAW filter (SPLIT)
Picture TSF1137U Sound
Picture TSF1241 Sound
Picture TSF5315 Sound
SAW filter (INTER)
TSF5220, TSF5221
TSF5321, TSF5344
Notes on Sanyo SAW Filters
There are two types of SAW filters, which differ in the piezoelectric substrate material used, as follows:
Lithium tantalate (LiTaO3) SAW filter
TSF11
... Japan
TSF12
... 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 low in-band ripple level.
Lithium niobate (LiNbO3) SAW filter
TSF52
... US
TSF53
... 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. 6277-12/13
LA75676V-S
A13285
SAW filter characteristics
The high band
response
is reduced
The high band
is extended
Frequency
S
t=7t
0.12
C=24pF
A13288
S
t=6t
0.12
C=24pF
A13287
S
t=5t
0.12
C=24pF
A13286
Coil Specifications
The Toko Electric Corporation 2-1-17 Higashi Yukigaya Ota-ku, Tokyo Telephone: +81-3-3727-1167
相關PDF資料 |
PDF描述 |
|---|---|
| LA75676V-S | AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24 |
| LA75676VA | AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24 |
| LA75676VA | AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24 |
| LA75676V | AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24 |
| LA75676V | AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LA7567B | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:LA7567B, LA7567BM |
| LA7567BM | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:LA7567B, LA7567BM |
| LA7567EV | 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 |
| LA7567GM | 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 NTSC SPLIT Support |
| 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 |
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