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參數(shù)資料
| 型號(hào)： | LA7565B |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | IF Signal-Processing IC for PAL/NTSC Multi-System Audio TV and VCR Products(用于PAL/NTSC多系統(tǒng)音頻電視機(jī)和VCR產(chǎn)品的IF信號(hào)處理芯片) |
| 中文描述： | 中頻信號(hào)處理集成電路PAL / NTSC制式多系統(tǒng)音頻電視機(jī)和錄像機(jī)產(chǎn)品（用于PAL / NTSC制式多系統(tǒng)音頻電視機(jī)和錄像機(jī)產(chǎn)品的中頻信號(hào)處理芯片） |
| 文件頁(yè)數(shù)： | 10/17頁(yè) |
| 文件大?。?/td> | 292K |
| 代理商： | LA7565B |
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No. 5636-10/17
LA7565B, 7565BM
Pin No.
Pin
Pin function
Equivalent circuit
5
6
7
8
V
CC
EQ amp
V
CC
and ground should be decoupled with as small a
separation as possible.
Connections for the equalizer circuit. This circuit corrects the
frequency characteristics of the video signal.
Pin 8 is the equalizer amplifier input. A 1.5-Vp-p video signal
is input and amplified to 2.0 Vp-p by the equalizer amplifier.
The equalizer amplifier is designed as a voltage-follower
amplifier with a gain of about 2.3 dB. When frequency
characteristic correction is used, a capacitor, an inductor,
and a resistor must be connected in series between pin 7
and ground.
Using the equalizer amplifier
If vi is the input signal and vo is the output signal, then:
R1/Z + 1 (vi + vin) = Vo
×
G
Where,
G: Gain of the voltage follower amplifier
vin: Imaginary short
G: About 2.3 dB
Assuming vin
≈
0:
Then,
AV = voG/vi = R1/Z + 1.
R1 is an IC internal resistor with a value of 1 k
. Simply
select a Z according to the desired characteristics. However,
since the equalizer amplifier is maximum at the Z resonance
point, care is required to prevent distortion from occurring at
that frequency.
Continued from preceding page.
9
APC filter
PLL detector APC filter connection.
The APC time constant is switched internally. When the PLL
is locked, the VCO is controlled over the path marked A in
the figure and the loop gain is lowered. When the PLL is
unlocked and in weak field reception conditions, the VCO is
controlled over the path marked B in the figure and the loop
gain is increased.
We recommend values of:
R = between 150 and 390
, and
C = 0.47 μF
for this APC filter.
Continued on next page.
相關(guān)PDF資料 |
PDF描述 |
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| LA7565KM | IF Signal-Processing IC for PAL/NTSC Multi-System Audio TV and VCR Products |
| 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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LA7565BM | 制造商:SANYO 制造商全稱(chēng):Sanyo Semicon Device 功能描述:IF Signal-Processing IC for PAL/NTSC Multi-System Audio TV and VCR Products |
| LA7565E | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:IF Signal-Processing IC for PAL/NTSC Multi-System Audio TV and VCR Products(292.33 k) |
| LA7565GM | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述: |
| LA7565KM | 制造商:SANYO 制造商全稱(chēng):Sanyo Semicon Device 功能描述:IF Signal-Processing IC for PAL/NTSC Multi-System Audio TV and VCR Products |
| LA7566 | 制造商:SANYO 制造商全稱(chēng):Sanyo Semicon Device 功能描述:VIF/SIF IF Signal-Processing Circuit with TV/VCR PAL and NTSC Multisound Support |
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