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參數資料
型號: LA75520K
元件分類: 接收器
英文描述: AM/FM, AUDIO/VIDEO DEMODULATOR, PDIP24
封裝: 0.300 INCH, DIP-24
文件頁數: 11/12頁
文件大小: 134K
代理商: LA75520K
LA75520K
No.A0648-8/12
Pin Functions
Pin No.
Pin name
Function
Equivalent Circuit
1
DE-EMPHASIS C
De-emphasis capacitor connection pin
This is used to switch the equivalent resistance
(5k
Ω or 7.5kΩ) internally in the IC to select the time
constant.
This switching is linked to the SIF input switch.
To disable de-emphasis, disconnect the capacitor.
Connection of an external capacitance of 0.01
μF
enables switching between 50 and 75
μs.
When the FM detector circuit is not to be used, the
FM VCO can be stopped by connecting it to ground
with a resistor of 1k
Ω or less.
1
4k
Ω
0.01
μF
2
SIF AGC FILTER
AGC filter pin for SIF carrier
0.01
μF is recommended for C1.
2
2k
Ω
C1
3
FM PLL FILTER
PLL filter pin of FM detector
This is used to configure an external lag lead filter.
Example: Connect 330pF in parallel with the filter on
the left (0.033
μF + 3.3kΩ).
3
0.033
μF
3.3k
Ω
330pF
3
8k
Ω
4
VCC
Power supply
5
6
EQ OUT
EQ FILTER
Equalizer circuit. This circuit is used to correct the
video signal frequency characteristics.
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 6 and ground.
Equalizer amplifier gain AV =
R1
Z
+ 1
R1 is the IC internal resistance, and is 1k
Ω. 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
R1:1k
Ω
5
2k
Ω
C
L
R
Z
Continued on next page.
相關PDF資料
PDF描述
LA75520K AM/FM, AUDIO/VIDEO DEMODULATOR, PDIP24
LA75520VA AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24
LA75521VA AUDIO/VIDEO DEMODULATOR, PDSO24
LA75521VA AUDIO/VIDEO DEMODULATOR, PDSO24
LA75525AVA AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24
相關代理商/技術參數
參數描述
LA75520KVA 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Monolithic Linear IC IF Signal Processing (VIF+SIF) IC that Supports the PAL Video Standard for TV Sets and VCRs
LA75521VA 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:IF Signal Processing (VIF+SIF) IC that Supports the PAL Video Standard for TV Sets and VCRs
LA75525AVA 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:VIF/SIF Signal-Processing IC
LA75525VA 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Monolithic Linear IC For TV Sets and VCRs VIF/SIF Signal-Processing IC
LA7555 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:IF Signal Processing (VIF+SIF) Cricuit for TV/VCR Use
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