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參數(shù)資料
| 型號(hào)： | 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(hào)強(qiáng)度因子處理電路與分體式支持NTSC制式 |
| 文件頁(yè)數(shù)： | 9/14頁(yè) |
| 文件大?。?/td> | 185K |
| 代理商： | LA7567GM |
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No. 6803-9/14
LA7567GM
Continued from preceding page.
Pin No.
Pin
Description
Equivalent circuit
6
7
8
EQ amp
Equalizer circuit. This circuit is used to correct the video
signal frequency characteristics.
Pin 8 is the EQ amplifier input. This amplifier amplifies a
1.5-V p-p video signal to 2-V p-p.
Notes on equalizer amplifier design
The equalizer amplifier is designed as a voltage follower
amplifier with a gain of about 0 dB. When used for
frequency characteristics correction, a capacitor, inductor,
and resistor must be connected in series between pin 7
and ground.
Approach used in the equalizer amplifier
If vi is the input signal and vo is the output signal, then:
R1
×
G
2
Where G is the voltage-follower amplifier gain.
Assume:
vin: Imaginary short
G: About 0 dB
vin
≈
0.
Then:
R1
AV = vvi
Z
R1 is the IC internal resistance, and is 1 k
. In the
application design, simply select Z to correspond to the
desired characteristics. However, since the EQ amplifier
gain will be maximum at the resonant point defined by Z,
care is required to assure that distortion does not occur.
6
7
8
2k
200
EQ INPUT
EQ OUTPUT
AGC
C
R
L =Z
1k
A13683
A13684
9
APC FILTER
PLL detector APC filter connection. The APC time constant
is switched internally in the IC. When locked, the VCO is
controlled by loop A and the loop gain is reduced. When
unlocked and during weak field reception, the VCO is
controlled by loop B and the loop gain is increased.
For this APC filter we recommend:
R = 150 to 390
C = 0.47 μF
9
1k
1k
1k
A
B
FROM
APC DET
A13685
C
+
R
Continued on next page.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 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 |
| 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 |
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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