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參數資料
| 型號： | LA75665M |
| 元件分類： | 接收器 |
| 英文描述： | AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24 |
| 封裝： | MFP-24 |
| 文件頁數： | 11/12頁 |
| 文件大小： | 139K |
| 代理商： | LA75665M |
No. 6227-8/12
LA75665M
Continued from preceding page.
Pin No.
Symbol
Pin function
Equivalent circuit
7
IF AGC
IF AGC filter connection.
The AGC voltage is created at pin 7 from the signal to which
peak detection was applied by the internal AGC detector.
Additionally, the IC includes an internal second AGC filter (a
lag-lead filter) used to create a dual time constant. A 0.022 F
capacitor is used as the external capacitor. The value of this
capacitor must be adjusted according to measurement of the
sag, AGC speed, and other circuit aspects.
7
C1
2 k
1 k
10 k
A12489
8
1st SIF IN
First SIF input.
A DC cut capacitor must be inserted in the input to this circuit.
When a SAW filter is used: The first SIF sensitivity can be
increased by inserting an inductor between the SAW and the IC
to match the SAW output and IC input capacitances.
When an intercarrier system is used: This pin must be
connected to ground through a capacitor.
8
A12490
2 k
2 k
9
RF AGC OUT
RF AGC output.
This output controls the tuner RF AGC. This is an open-
collector output with an inserted 100-
protective resistor.
Determine the value of the external bleeder resistor to match
the tuner specifications.
9
A12491
VCC
100
3 pF
500
10
AFT OUT
AFT output.
The AFT center voltage is created with an external bleeder
resistor. The AFT gain increases as the value of this bleeder
resistor increases. The value of this resistor must not exceed
390 k
. This circuit includes a control function that controls the
AFT voltage to be equal to the center voltage in weak field
reception conditions.
10
1 k
A12492
Continued on next page.
相關PDF資料 |
PDF描述 |
|---|---|
| LA75665NM | AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24 |
| LA75665NM | AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24 |
| LA75665NV | AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24 |
| LA7566 | AM/FM, AUDIO/VIDEO DEMODULATOR, PDIP24 |
| LA75675M-S | AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LA75665NM | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| LA75665NV | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| LA75675M-S | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:VIF/SIF IF Signal-Processing Circuit that Supports NTSC Intercarrier for TV and VCR Products |
| LA75676M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:For TV and VCR Products IF Signal Processor (VIF+SIF) |
| LA75676V | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:For TV and VCR Products IF Signal Processor (VIF+SIF) |
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