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參數(shù)資料
| 型號： | LA1867NM |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Car Radio Single-Chip Tuner System |
| 中文描述： | 汽車無線電單芯片調(diào)諧器系統(tǒng) |
| 文件頁數(shù)： | 9/32頁 |
| 文件大?。?/td> | 941K |
| 代理商： | LA1867NM |
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No. 4619-9/32
LA1867NM
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Pin
Function
Equivalent internal circuit
Note
37
FM IF IN
36
IF BYPASS
23
Mute drive output
22
Mute input
33
FM mute ON Adj
Limited amplifier input
Select the capacitor grounding point
carefully.
The muting time constants from the
external CR circuit are determined as
follows.
Attack time T
A
= R
1
×
C
2
Release time T
R
= R
2
×
C
2
Noise convergence adjustment
Divide the V
23
voltage by R
2
when
there is no input at the antenna input,
and input that voltage to pin 22.
Noise convergence will be maximum
when V
22
= 2 V.
The variation range is 5 to 35 dB,
taking the 1 kHz 22.5 kHz dev output
as the reference.
Muting off function
The muting is turned off when pin 22 is
shorted to ground.
The muting on level is adjusted by changing
the external resistance R.
Unit (resistance:
, capacitance:F)
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